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EnglishVehicle Care -> Vehicle Checks for your Chevrolet Silverado 1500 2018-2025
334
Vehicle Care
Damage to suspension components caused
by modifying vehicle height outside of
factory settings will not be covered by the
vehicle warranty.
Caution
Warning (Continued)
Even small amounts of contamination can
cause damage to vehicle systems. Do not
allow contaminants to contact the fluids,
reservoir caps, or dipsticks.
or parts. Always follow owner’s manual
procedures and consult the service
manual for your vehicle before doing any
service work.
Damage to vehicle components resulting
from modifications or the installation or use
of non-GM certified parts, including control
module or software modifications, is not
covered under the terms of the vehicle
warranty and may affect remaining
Hood
If doing some of your own service work, use
the proper service manual. It tells you much
more about how to service the vehicle than
this manual can. To order the proper service
manual, see Publication Ordering
Warning
{
warranty coverage for affected parts.
For vehicles with auto engine stop/start,
turn the vehicle off before opening the
hood. If the vehicle is on, the engine will
start when the hood is opened. You or
others could be injured.
GM Accessories are designed to complement
and function with other systems on the
vehicle. See your dealer to accessorize the
vehicle using genuine GM Accessories
installed by a dealer technician.
Information 0 437.
This vehicle has an airbag system. Before
attempting to do your own service work,
see Servicing the Airbag-Equipped Vehicle
0 68.
Also, see Adding Equipment to the
Airbag-Equipped Vehicle 0 68.
If equipped with remote vehicle start, open
the hood before performing any service
work to prevent remote starting the vehicle
accidentally. See Remote Vehicle Start 0 18.
Warning
{
Components under the hood can get hot
from running the engine. To help avoid
the risk of burning unprotected skin,
never touch these components until they
have cooled, and always use a glove or
towel to avoid direct skin contact.
Vehicle Checks
Keep a record with all parts receipts and list
the mileage and the date of any service
work performed. See Maintenance Records
0 424.
Doing Your Own Service Work
Warning
{
It can be dangerous to work on your
vehicle if you do not have the proper
knowledge, service manual, tools,
(Continued)
Clear any snow from the hood before
opening.
Vehicle Care
335
To open the hood:
To close the hood:
1. Pull the hood release lever with the
i symbol. It is on the lower left side
of the instrument panel.
1. Before closing the hood, be sure all filler
caps are on properly, and all tools are
removed.
2. Pull the hood down until the strut
system is no longer holding up the hood.
3. Allow the hood to fall. Check to make
sure the hood is latched completely.
Repeat this process with additional force
if necessary.
Warning
{
Do not drive the vehicle if the hood is
not latched completely. The hood could
open fully, block your vision, and cause a
crash. You or others could be injured.
Always close the hood completely before
driving.
2. Go to the front of the vehicle and locate
the secondary release lever under the
front center of the hood. Push the
secondary hood release lever to the right
to release.
The Driver Information Center (DIC) will
display a message if the hood is not fully
closed, and the vehicle is moving. Stop and
turn off the vehicle, check the hood for
obstructions, and close the hood again.
Check to see if the message still appears on
the DIC.
3. After you have partially lifted the hood,
the gas strut system will automatically
lift the hood and hold it in the fully
open position.
336
Vehicle Care
Engine Compartment Overview
2.7L L4 Engine (L3B)
Vehicle Care
337
1. Remote Negative (–) Location. See Jump
Starting - North America 0 399.
2. Positive (+) Terminal (Under Cover). See
Jump Starting - North America 0 399.
3. Battery - North America 0 352.
4. Engine Compartment Fuse Block 0 362.
5. Engine Cooling Fans (Out of View). See
Cooling System 0 343.
6. Engine Oil Fill Cap. See “When to Add
Engine Oil” under Engine Oil 0 339.
7. Engine Oil Dipstick. See “Checking Engine
Oil” under Engine Oil 0 339.
8. Coolant Surge Tank and Pressure Cap.
See Cooling System 0 343.
9. Engine Air Cleaner/Filter 0 342.
10. Brake Fluid Reservoir. See Brake Fluid
0 351.
11. Windshield Washer Fluid Reservoir. See
“Adding Washer Fluid” under Washer
Fluid 0 349.
338
Vehicle Care
5.3L V8 Engine (L84) Shown, 6.2L V8 Engine (L87) Similar
1. Remote Negative (–) Location. See Jump
Starting - North America 0 399.
5. Engine Oil Dipstick. See “Checking Engine
Oil” under Engine Oil 0 339.
8. Coolant Surge Tank and Pressure Cap.
See Cooling System 0 343.
2. Positive (+) Terminal (Under Cover). See
Jump Starting - North America 0 399.
6. Engine Cooling Fans (Out of View). See
Cooling System 0 343.
9. Engine Air Cleaner/Filter 0 342.
10. Brake Fluid Reservoir. See Brake Fluid
0 351.
3. Battery - North America 0 352.
7. Engine Oil Fill Cap. See “When to Add
Engine Oil” under Engine Oil 0 339.
4. Engine Compartment Fuse Block 0 362.
Vehicle Care
339
11. Windshield Washer Fluid Reservoir. See
“Adding Washer Fluid” under Washer
Fluid 0 349.
dipstick, wipe it with a clean paper towel
or cloth, then push it back in all the way.
Remove it again, keeping the tip down,
and check the level.
Checking Engine Oil
Check the engine oil level regularly, every
650 km (400 mi), especially prior to a long
trip. The engine oil dipstick handle is a loop.
See Engine Compartment Overview 0 336 for
the location.
Engine Oil
When to Add Engine Oil
To ensure proper engine performance and
long life, careful attention must be paid to
engine oil. Following these simple, but
important steps will help protect your
investment:
Warning
{
The engine oil dipstick handle may be
hot; it could burn you. Use a towel or
glove to touch the dipstick handle.
.
Use engine oil approved to the proper
specification and of the proper viscosity
grade. See “Selecting the Right Engine
Oil” in this section.
If the oil is below the cross-hatched area at
the tip of the dipstick and the engine has
been off for at least 15 minutes, add 1 L
(1 qt) of the recommended oil and then
recheck the level. See “Selecting the Right
Engine Oil” later in this section for an
explanation of what kind of oil to use. For
engine oil crankcase capacity, see Capacities
and Specifications 0 426.
If a low oil Driver Information Center (DIC)
message displays, check the oil level.
.
Check the engine oil level regularly and
maintain the proper oil level. See
“Checking Engine Oil” and “When to Add
Engine Oil” in this section.
Follow these guidelines:
.
To get an accurate reading, park the
vehicle on level ground. Check the engine
oil level after the engine has been off for
at least two hours. Checking the engine
oil level on steep grades or too soon after
engine shutoff can result in incorrect
readings. Accuracy improves when
.
.
Change the engine oil at the appropriate
time. See Engine Oil Life System 0 341.
Always dispose of engine oil properly. See
“What to Do with Used Oil” in this
section.
Caution
checking a cold engine prior to starting.
Remove the dipstick and check the level.
Do not add too much oil. Oil levels above
or below the acceptable operating range
shown on the dipstick are harmful to the
engine. If the oil level is above the
operating range (i.e., the engine has so
(Continued)
.
If unable to wait two hours, the engine
must be off for at least 15 minutes if the
engine is warm, or at least 30 minutes if
the engine is not warm. Pull out the
340
Vehicle Care
Engine Oil Additives/Engine Oil Flushes
Caution (Continued)
Do not add anything to the oil. The
recommended oils meeting the dexos1
specification are all that is needed for good
performance and engine protection.
much oil that the oil level gets above the
cross-hatched area that shows the proper
operating range), the engine could be
damaged. Drain the excess oil or limit
driving of the vehicle, and seek a service
professional to remove the excess oil.
Engine oil system flushes are not
recommended and could cause engine
damage not covered by the vehicle
warranty.
Caution
Failure to use the recommended engine
oil or equivalent can result in engine
damage not covered by the vehicle
warranty.
See Engine Compartment Overview 0 336 for
the location of the engine oil fill cap.
What to Do with Used Oil
Add enough oil to put the level somewhere
in the proper operating range. Push the
dipstick all the way back in when through.
Used engine oil contains certain elements
that can be unhealthy for your skin and
could even cause cancer. Do not let used oil
stay on your skin for very long. Clean your
skin and nails with soap and water, or a
good hand cleaner. Wash or properly
dispose of clothing or rags containing used
engine oil. See the manufacturer's warnings
about the use and disposal of oil products.
Viscosity Grade
Use SAE 0W-20 viscosity grade engine oil for
the 5.3L and 6.2L V8 engines.
Selecting the Right Engine Oil
Selecting the right engine oil depends on
both the proper oil specification and
viscosity grade. See Recommended Fluids
and Lubricants 0 421.
Use SAE 5W-30 viscosity grade engine oil for
the 2.7L L4 engine. Cold Temperature
Operation: In an area of extreme cold,
where the temperature falls below −29 °C
(−20 °F), an SAE 0W-30 oil may be used. An
oil of this viscosity grade will provide easier
cold starting for the engine at extremely
low temperatures.
Specification
Used oil can be a threat to the environment.
If you change your own oil, be sure to drain
all the oil from the filter before disposal.
Never dispose of oil by putting it in the
trash or pouring it on the ground, into
sewers, or into streams or bodies of water.
Recycle it by taking it to a place that
collects used oil.
Use full synthetic engine oils that meet the
dexos1 specification. Engine oils that have
been approved by GM as meeting the
dexos1 specification are marked with the
dexos1 approved logo.
When selecting an oil of the appropriate
viscosity grade, it is recommended to select
an oil of the correct specification. See
“Specification” earlier in this section.
Vehicle Care
341
will perform this work and reset the system.
It is also important to check the oil regularly
over the course of an oil drain interval and
keep it at the proper level.
The oil life system can also be reset as
follows:
Engine Oil Life System
When to Change Engine Oil
1. Display the oil life percentage on the
DIC. See Driver Information Center (DIC)
(Base Level) 0 127 or Driver Information
Center (DIC) (Uplevel) 0 128.
This vehicle has a computer system that
indicates when to change the engine oil and
filter. This is based on a combination of
factors which include engine revolutions,
engine temperature, and miles driven. Based
on driving conditions, the mileage at which
an oil change is indicated can vary
considerably. For the oil life system to work
properly, the system must be reset every
time the oil is changed.
If the system is ever reset accidentally, the
oil must be changed at 5 000 km (3,000 mi)
since the last oil change. Remember to reset
the oil life system whenever the oil is
changed.
2. Fully press the accelerator pedal slowly
three times within five seconds.
3. If the display changes to 100%, the
system is reset.
How to Reset the Engine Oil Life System
If the vehicle has a CHANGE ENGINE OIL
SOON message and it comes back on when
the vehicle is started and/or the oil
life percentage is near 0%, the engine oil
life system has not been reset. Repeat the
procedure.
Reset the system whenever the engine oil is
changed so that the system can calculate
the next engine oil change. Always reset the
engine oil life to 100% after every oil
change. It will not reset itself. To reset the
engine oil life system:
On some vehicles, when the system has
calculated that oil life has been diminished,
a CHANGE ENGINE OIL SOON message comes
on to indicate that an oil change is
1. Display the oil life percentage on the
DIC. See Driver Information Center (DIC)
(Base Level) 0 127 or Driver Information
Center (DIC) (Uplevel) 0 128.
necessary. Change the oil as soon as
Automatic Transmission Fluid
possible within the next 1 000 km (600 mi).
It is possible that, if driving under the best
conditions, the oil life system might indicate
that an oil change is not necessary for up to
a year. The engine oil and filter must be
changed at least once a year and, at this
time, the system must be reset. For vehicles
without the CHANGE ENGINE OIL SOON
message, an oil change is needed when the
REMAINING OIL LIFE percentage is near 0%.
Your dealer has trained service people who
When to Check and Change Automatic
Transmission Fluid
2. Press the thumbwheel on the steering
wheel, or the trip odometer reset stem if
the vehicle does not have DIC controls,
for several seconds. When the
confirmation message displays, select
YES. The oil life will change to 100%.
It is usually not necessary to check the
transmission fluid level. The only reason for
fluid loss is a transmission leak or
overheated transmission. This vehicle is not
equipped with a transmission fluid level
dipstick. There is a special procedure for
checking and changing the transmission fluid
in these vehicles. Because this procedure is
342
Vehicle Care
difficult, this should be done at the dealer.
Contact the dealer for additional information
or the procedure can be found in the service
manual. See Publication Ordering
Select Reset then press the thumbwheel
or press the reset stem for several
seconds.
When to Change the Engine Air Filter
When the Driver Information Center (DIC)
displays a message to replace the engine air
filter at the next oil change, follow this
timing.
4. Press the thumbwheel or the reset stem
to confirm the reset.
Information 0 437.
Caution
When the DIC displays a message to replace
the engine air filter soon, replace the engine
air filter at the earliest convenience.
Engine Air Cleaner/Filter
The engine air cleaner/filter is on the driver
side of the engine compartment. See Engine
Compartment Overview 0 336.
Use of the incorrect automatic
transmission fluid may damage the
vehicle, and the damage may not be
covered by the vehicle warranty. Always
use the correct automatic transmission
fluid. See Recommended Fluids and
Lubricants 0 421.
The system must be reset after the engine
air filter is changed.
When to Inspect the Engine Air Cleaner/
Filter
If the DIC displays a message to check the
engine air filter system, see your dealer.
If the vehicle is not equipped with the
engine air filter life system see Maintenance
Schedule 0 417 for intervals on inspecting
and replacing the engine air cleaner filter.
How to Reset the Engine Air Filter Life
System
Change the fluid and filter at the scheduled
maintenance intervals listed in Maintenance
Schedule 0 417. Be sure to use the
transmission fluid listed in Recommended
Fluids and Lubricants 0 421.
To reset:
1. Place the vehicle in P (Park).
How to Inspect/Replace the Engine Air
Cleaner/Filter
2. Display the Air Filter Life on the DIC. See
Driver Information Center (DIC) (Base
Level) 0 127 or Driver Information Center
(DIC) (Uplevel) 0 128.
Do not start or run the engine with the
engine air cleaner/filter housing open.
Before removing the engine air cleaner/
filter, clear any dirt and debris away from
the engine air cleaner/filter housing and
nearby components. Remove the engine air
cleaner/filter. Lightly tap and shake the
engine air cleaner/filter (away from the
vehicle), to release loose dust and dirt.
Engine Air Filter Life System
If equipped, this feature provides the engine
air filter’s remaining life and best timing for
a change. The timing to change an engine
air filter depends on driving and
3. Press T on the steering wheel, or press
the trip odometer reset stem if the
vehicle does not have DIC controls, to
move to the Reset/Disable display area.
environmental conditions.
Vehicle Care
Warning
343
Inspect the engine air cleaner/filter for
damage; replace if damaged. Do not clean
the engine air cleaner/filter or components
with water or compressed air.
3. Remove the three screws on top of the
cover of the housing, then slide and lift
the cover.
{
Operating the engine with the air
cleaner/filter off can cause you or others
to be burned. Use caution when working
on the engine. Do not start the engine or
drive the vehicle with the air cleaner/
filter off, as flames may be present if the
engine backfires.
4. Lift and remove the engine air cleaner/
filter.
To inspect or replace the engine air cleaner/
filter:
Warning
{
If part replacement is necessary, the part
must be replaced with one of the same
part number or with an equivalent part.
Use of a replacement part without the
same fit, form, and function may result
in personal injury or damage to the
vehicle.
Caution
If the air cleaner/filter is off, dirt can
easily get into the engine, which could
damage it. Always have the air cleaner/
filter in place when driving.
5. Lightly tap and shake the engine air
cleaner/filter, away from the vehicle, to
release loose dust and dirt. Replace the
engine air filter if damaged.
Cooling System
5.3L V8 Engine (L84) Shown, 2.7L L4 Engine
(L3B), and 6.2L V8 Engine (L87) Similar.
If the vehicle has the Duramax diesel
engine, see the Duramax diesel supplement.
6. Reverse Steps 2–5 to reinstall the engine
air cleaner/filter cover housing.
The cooling system allows the engine to
maintain the correct working temperature.
1. Air Duct Clamp
2. Screws
7. If equipped, reset the engine air filter life
system after replacing the engine air
filter. See Engine Air Filter Life System
0 342.
1. Locate the air cleaner/filter assembly.
See Engine Compartment Overview
0 336.
2. Disconnect the outlet duct by loosening
the air duct clamp (1).
344
Vehicle Care
1. Engine Electric Cooling Fans (Out
of View)
2. Coolant Surge Tank and Pressure Cap
The following explains the cooling system
and how to check and add coolant when it
is low. If there is a problem with engine
overheating, see Engine Overheating 0 347.
Warning
{
What to Use
An underhood electric fan can start up
even when the engine is not running and
can cause injury. Keep hands, clothing,
and tools away from any underhood
electric fan.
Warning
{
Plain water, or other liquids such as
alcohol, can boil before the proper
coolant mixture will. With plain water or
the wrong mixture, the engine could get
too hot but there would not be an
overheat warning. The engine could catch
fire and you or others could be burned.
2.7L L4 Engine (L3B)
Warning
{
Do not touch heater, radiator, a/c pipes
or hoses, or other engine parts. They can
be very hot and can burn you. Do not
run the engine if there is a leak; all
coolant could leak out. That could cause
an engine fire and can burn you. Fix any
leak before driving the vehicle.
Use a 50/50 mixture of clean, drinkable
water and DEX-COOL coolant. This mixture:
Gives freezing protection down to −37 °C
(−34 °F), outside temperature.
Gives boiling protection up to 129 °C
(265 °F), engine temperature.
Protects against rust and corrosion.
Will not damage aluminum parts.
.
.
Engine Coolant
.
.
.
The cooling system in the vehicle is filled
with DEX-COOL engine coolant. This coolant
is designed to remain in the vehicle for
5 years or 240 000 km (150,000 mi),
whichever occurs first.
Helps keep the proper engine
temperature.
5.3L V8 Engine (L84) Shown, 6.2L V8 Engine
(L87) Similar
Vehicle Care
345
Automatic Coolant Service Fill
Instructions (L3B Engine)
Caution
Do not use anything other than a mix of
DEX-COOL coolant that meets GM
Standard GMW3420 and clean, drinkable
water. Anything else can cause damage
to the engine cooling system and the
vehicle, which would not be covered by
the vehicle warranty.
This feature assists in filling and removing
air from the cooling system after service of
components or when coolant is added after
being too low.
To activate the fill and air removal process:
1. Remove the coolant surge tank pressure
cap when the cooling system, including
the coolant surge tank pressure cap and
upper radiator hose, is no longer hot.
Turn the pressure cap; slowly
counterclockwise about one full turn. If a
hiss is heard, wait for that to stop.
A hiss means there is still some
pressure left.
Never dispose of engine coolant by putting
it in the trash, or by pouring it on the
ground, or into sewers, streams, or bodies of
water. Have the coolant changed by an
authorized service center, familiar with legal
requirements regarding used coolant
disposal. This will help protect the
All Engines
Check to see if coolant is visible in the
coolant surge tank. If the coolant inside the
coolant surge tank is boiling, wait until it
cools down. The coolant level should be at
or above the indicated mark. If it is not,
there may be a leak in the cooling system.
environment and your health.
2. Keep turning the pressure cap slowly,
and remove it.
Checking Coolant
3. Fill the coolant surge tank with the
proper mixture to the indicated mark.
The coolant surge tank is in the engine
compartment on the driver side of the
vehicle. See Engine Compartment Overview
0 336.
If coolant is visible but the coolant level is
not at or above the indicated mark, see the
following sections on how to add coolant to
the coolant surge tank following.
4. Connect the vehicle to a battery charger.
5. Set the ignition to service mode, see
Ignition Positions 0 211.
The vehicle must be on a level surface when
checking the coolant level.
6. Turn off the air conditioning.
7. Set the parking brake.
346
Vehicle Care
8. At the same time, press the accelerator
and the brake for automatic vehicles for
two seconds, then release.
Caution
Warning
{
Failure to follow the specific coolant fill
procedure could cause the engine to
overheat and could cause system
damage. If coolant is not visible in the
surge tank, contact your dealer.
Spilling coolant on hot engine parts can
burn you. Coolant contains ethylene
glycol and it will burn if the engine parts
are hot enough.
9. Listen for pump activation and
movement of the control valves while
watching the level of the coolant in the
surge tank. Add fluid as the level drops
below the indicated mark on the surge
tank. Allow 15 minutes for the fill and air
removal process to complete.
If no coolant is visible in the surge tank, add
coolant.
Warning
{
Plain water, or other liquids such as
alcohol, can boil before the proper
10. Reinstall the surge tank cap.
coolant mixture will. With plain water or
the wrong mixture, the engine could get
too hot but there would not be an
overheat warning. The engine could catch
fire and you or others could be burned.
If the tank empties, turn the ignition off,
allow the Electronic Control Module (ECM) to
go to sleep, about two minutes, refill to the
indicated mark, and repeat Steps 5–9.
How to Add Coolant to the Coolant
Surge Tank for Gasoline Engines
Except L3B
1. Remove the coolant surge tank pressure
cap when the cooling system, including
the coolant surge tank pressure cap and
upper radiator hose, is no longer hot.
Warning
{
If the vehicle has a diesel engine, see
“Cooling System” in the Duramax diesel
supplement for the proper coolant fill
procedure.
Steam and scalding liquids from a hot
cooling system are under pressure.
Turning the pressure cap, even a little,
can cause them to come out at high
speed and you could be burned. Never
turn the cap when the cooling system,
including the pressure cap, is hot. Wait
for the cooling system and pressure cap
to cool.
Turn the pressure cap slowly
counterclockwise about one full turn. If a
hiss is heard, wait for that to stop.
A hiss means there is still some
pressure left.
2. Keep turning the pressure cap slowly,
and remove it.
3. Fill the coolant surge tank with the
proper mixture to the full cold mark.
Vehicle Care
347
4. With the coolant surge tank pressure cap
off, start the engine and let it run until
the engine coolant temperature gauge
indicates approximately 90 °C (195 °F).
2.7L L4, 5.3L V8, and 6.2L V8 Engines
Caution
Check to see if the engine cooling fans are
running. If the engine is overheating, the
fans should be running. If they are not, do
not continue to run the engine and have the
vehicle serviced.
Do not run the engine if there is a leak
in the engine cooling system. This can
cause a loss of all coolant and can
damage the system and vehicle. Have
any leaks fixed right away.
By this time, the coolant level inside the
coolant surge tank may be lower. If the
level is lower, add more of the proper
mixture to the coolant surge tank until
the level reaches the indicated mark.
If the engine or transmission detects an
impending hot fluid condition, then the
transmission may force upshifts to limit
temperatures. Downshifts may also be
prevented in this instance. Normal operation
may continue unless the display indicates
there is a hot condition and engine should
be idled.
The vehicle has several indicators to warn of
engine overheating.
5. Replace the pressure cap tightly.
There is a coolant temperature gauge in the
vehicle's instrument cluster. See Engine
Coolant Temperature Gauge 0 113.
6. Verify coolant level after the engine is
shut off and the coolant is cold.
If necessary, repeat coolant fill procedure
Steps 1–6.
In addition, there are ENGINE OVERHEATED
STOP ENGINE, ENGINE OVERHEATED IDLE
ENGINE, and ENGINE POWER IS REDUCED
messages in the Driver Information
Center (DIC).
If Steam is Coming from the Engine
Compartment
Caution
If the pressure cap is not tightly installed,
coolant loss and engine damage may
occur. Be sure the cap is properly and
tightly secured.
Warning
{
If the decision is made not to lift the hood
when this warning appears, get service help
right away. See Roadside Assistance Program
0 433.
Steam and scalding liquids from a hot
cooling system are under pressure.
Turning the pressure cap, even a little,
can cause them to come out at high
speed and you could be burned. Never
turn the cap when the cooling system,
including the pressure cap, is hot. Wait
for the cooling system and pressure cap
to cool.
Engine Overheating
If the vehicle has the Duramax diesel
engine, see the Duramax diesel supplement.
If the decision is made to lift the hood,
make sure the vehicle is parked on a level
surface.
348
Vehicle Care
3. When it is safe to do so, pull off the
road, shift to P (Park) or N (Neutral) and
let the engine idle.
If No Steam is Coming from the Engine
Compartment
Overheated Engine Protection
Operating Mode
The ENGINE OVERHEATED STOP ENGINE or
the ENGINE OVERHEATED IDLE ENGINE
message, along with a low coolant
If an overheated engine condition exists and
the ENGINE POWER IS REDUCED message
displays, an overheat protection mode which
alternates firing groups of cylinders helps to
prevent engine damage. In this mode, a loss
in power and engine performance will be
noticed. This operating mode allows the
vehicle to be driven to a safe place in an
emergency. Driving extended distances and/
or towing a trailer in the overheat
If the temperature overheat gauge is no
longer in the overheat zone or an overheat
warning no longer displays, the vehicle can
be driven. Continue to drive the vehicle
slowly for about 10 minutes. Keep a safe
vehicle distance from the vehicle in front.
If the warning does not come back on,
continue to drive normally and have the
cooling system checked for proper fill and
function.
condition, can indicate a serious problem.
The 2.7L L4 engine will shut down
automatically if the ENGINE OVERHEATED
STOP ENGINE message displays.
If there is an engine overheat warning, but
no steam is seen or heard, the problem may
not be too serious. Sometimes the engine
can get a little too hot when the vehicle:
protection mode should be avoided.
If the warning continues, pull over, stop, and
park the vehicle right away.
If the engine or transmission detects an
impending hot fluid condition, then the
transmission may force upshifts to limit
temperatures. Downshifts may also be
prevented in this instance. Normal operation
may continue unless the display indicates
there is a hot condition and engine should
be idled.
.
.
.
.
Climbs a long hill on a hot day.
Stops after high-speed driving.
Idles for long periods in traffic.
Tows a trailer; see Trailer Towing 0 303.
If there is still no sign of steam and the
vehicle is equipped with an engine driven
cooling fan, push down the accelerator until
the engine speed is about twice as fast as
normal idle speed for at least five minutes
while the vehicle is parked. If the warning is
still there, turn off the engine and get
everyone out of the vehicle until it
cools down.
If the ENGINE OVERHEATED STOP ENGINE or
the ENGINE OVERHEATED IDLE ENGINE
message appears with no sign of steam, try
this for a minute or so:
Caution
1. Turn the air conditioning off.
After driving in the overheated engine
protection operating mode, the engine oil
will be severely degraded. Any repairs
performed before the engine is cool may
(Continued)
2. Turn the heater on to the highest
temperature and to the highest fan
speed. Open the windows as necessary.
If there is no sign of steam, idle the engine
for five minutes while parked. If the warning
is still displayed, turn off the engine until it
cools down.
Vehicle Care
Caution
349
Washer Fluid
Caution (Continued)
.
.
.
Do not use washer fluid that contains
any type of water repellent coating.
This can cause the wiper blades to
chatter or skip.
cause engine damage. Allow the engine
to cool before attempting any repair.
Repair the cause of coolant loss, change
the oil, and reset the oil life system. See
Engine Oil 0 339.
What to Use
When windshield washer fluid needs to be
added, be sure to read the manufacturer's
instructions before use. Use a fluid that has
sufficient protection against freezing in an
area where the temperature may fall below
freezing.
Do not use engine coolant (antifreeze)
in the windshield washer. It can
damage the windshield washer system
and paint.
Engine Fan
If the vehicle has the Duramax diesel
engine, see the Duramax diesel supplement.
Adding Washer Fluid
Do not mix water with ready-to-use
washer fluid. Water can cause the
solution to freeze and damage the
washer fluid tank and other parts of
the washer system.
The vehicle has a low washer fluid message
on the DIC that comes on when the washer
fluid is low. The message is displayed for
15 seconds at the start of each ignition cycle.
When the WASHER FLUID LOW ADD FLUID
message displays, washer fluid will need to
be added to the windshield washer fluid
reservoir.
The vehicle has electric cooling fan(s). The
fans may be heard spinning at low speed
during most everyday driving. The fans may
turn off if no cooling is required. Under
heavy vehicle loading, trailer towing, high
outside temperatures, or operation of the air
conditioning system, the fans may change
to high speed and an increase in fan noise
may be heard. This is normal and indicates
that the cooling system is functioning
properly. The fans will change to low speed
when additional cooling is no longer
required.
.
.
When using concentrated washer fluid,
follow the manufacturer instructions
for adding water.
Fill the washer fluid tank only
three-quarters full when it is very cold.
This allows for fluid expansion if
freezing occurs, which could damage
the tank if it is completely full.
Brakes
The electric engine cooling fans may run
after the engine has been turned off. This is
normal and no service is required.
Open the cap with the washer symbol on it.
Add washer fluid until the tank is full. See
Engine Compartment Overview 0 336 for
reservoir location.
Disc brake linings have built-in wear
indicators that make a high-pitched warning
sound when the brake linings are worn and
350
Vehicle Care
new linings are needed. The sound can come
and go or can be heard all the time when
the vehicle is moving, except when applying
the brake pedal firmly.
Brake pads should be replaced as complete
axle sets.
When the system has determined that the
brake pads need to be replaced, a message
will display, which may include mileage
remaining.
Brake Pedal Travel
See your dealer if the brake pedal does not
return to normal height, or if there is a
rapid increase in pedal travel. This could be
a sign that brake service may be required.
Brake pads should always be replaced as
complete axle sets.
Warning
{
The brake wear warning sound means
that soon the brakes will not work well.
That could lead to a crash. When the
brake wear warning sound is heard, have
the vehicle serviced.
How to Reset the Brake Pad Life System
The system will automatically detect when
significantly worn brake pads are replaced.
When the ignition is turned on after new
pads and wear sensors are installed, a
message will display. Follow the prompts to
reset the system.
Replacing Brake System Parts
Always replace brake system parts with
new, approved replacement parts. If this is
not done, the brakes may not work
properly. The braking performance can
change in many ways if the wrong brake
parts are installed or if parts are improperly
installed.
Caution
Continuing to drive with worn-out brake
linings could result in costly brake
repairs.
The brake pad life system can also be
manually reset:
1. Display Brake Pad Life on the DIC. See
Driver Information Center (DIC) (Base
Level) 0 127 or Driver Information Center
(DIC) (Uplevel) 0 128.
Brake Pad Life System
Some driving conditions or climates can
cause a brake squeal when the brakes are
first applied, clearing up following several
applications. This does not mean something
is wrong with the brakes.
When to Change Brake Pads
This vehicle has a system that estimates the
remaining life of the front and rear brake
pads. Brake pad life is displayed in the
Driver Information Center (DIC), along with
a percentage for each axle. The system must
be reset every time the brake pads are
changed.
2. Press the thumbwheel or the trip
odometer reset stem if the vehicle does
not have DIC buttons. Select front or rear
pads as appropriate.
Properly torqued wheel nuts are necessary
to help prevent brake pulsation. When tires
are rotated, inspect brake linings for wear
and evenly tighten wheel nuts in the proper
sequence to torque specifications. See
Capacities and Specifications 0 426.
3. Select YES on the confirmation message,
or press the trip odometer reset stem on
a base level DIC. Repeat for pads on the
other axle if they were also replaced.
Vehicle Care
351
Always clean the brake fluid reservoir cap
and the area around the cap before
removing it.
How to Disable the Brake Pad Life
System
Brake Fluid
The brake pad life system can be turned off.
This may be necessary if aftermarket brake
pads without wear sensors are installed.
When the system is turned off, the front
and rear brake pad life percentages will not
display. However, the built-in wear
indicators that make a high-pitched warning
sound when the brake pads are worn can
still determine when the pads should be
replaced. See Brakes 0 349.
Do not top off the brake fluid. Adding fluid
does not correct a leak. If fluid is added
when the linings are worn, there will be too
much fluid when new brake linings are
installed. Add or remove fluid, as necessary,
only when work is done on the brake
hydraulic system.
The brake master cylinder reservoir is filled
with GM approved DOT 4 brake fluid as
indicated on the reservoir cap. See Engine
Compartment Overview 0 336 for the
location of the reservoir.
Warning
{
If too much brake fluid is added, it can
spill on the engine and burn, if the
engine is hot enough. You or others could
be burned, and the vehicle could be
damaged. Add brake fluid only when
work is done on the brake hydraulic
system.
To turn off the brake pad life system:
Checking Brake Fluid
1. Display Brake Pad Life on the DIC. See
Driver Information Center (DIC) (Base
Level) 0 127 or Driver Information Center
(DIC) (Uplevel) 0 128.
With the vehicle in P (Park) on a level
surface, the brake fluid level should be
between the minimum and maximum marks
on the brake fluid reservoir.
2. Select DISABLE.
There are only two reasons why the brake
fluid level in the reservoir may go down:
To turn the brake pad life system back on,
follow the above steps but select ENABLE in
Step 2.
When the brake fluid falls to a low level,
the brake warning light comes on. See Brake
System Warning Light 0 119.
.
Normal brake lining wear. When new
linings are installed, the fluid level goes
back up.
Brake fluid absorbs water over time which
degrades the effectiveness of the brake fluid.
Replace brake fluid at the specified intervals
to prevent increased stopping distance. See
Maintenance Schedule 0 417.
.
A fluid leak in the brake hydraulic system.
Have the brake hydraulic system fixed.
With a leak, the brakes will not
work well.
352
Vehicle Care
What to Add
Stop/Start System
Vehicle Storage
Use only GM approved DOT 4 brake fluid
from a clean, sealed container. See
Recommended Fluids and Lubricants 0 421.
Vehicles equipped with a 2.7L L3B, , 5.3L L84
or 6.2L L87 are equipped with a Stop/Start
system to shut off the engine to help
Warning
{
Batteries have acid that can burn you and
gas that can explode. You can be badly
hurt if you are not careful. Always wear
eye protection. See Jump Starting - North
America 0 399 for tips on working
conserve fuel. See Stop/Start System 0 214.
Warning
{
Vehicles with the Stop/Start system have an
Absorbed Glass Mat (AGM) 12-volt battery.
Installation of a standard 12-volt battery will
result in reduced 12-volt battery life. When
using a 12-volt battery charger on the 12-volt
AGM battery, some chargers have an AGM
battery setting on the charger. If available,
use the AGM setting on the charger to limit
charge voltage to 14.8 volts. Follow the
charger manufacturer’s instructions.
The wrong or contaminated brake fluid
could result in damage to the brake
system. This could result in the loss of
braking leading to a possible injury.
Always use the proper GM approved
brake fluid.
around a battery without getting hurt.
Infrequent Usage: Remove the black,
negative (−) cable from the battery to keep
the battery from running down.
Extended Storage: Remove the black,
negative (−) cable from the battery or use a
battery trickle charger.
Caution
If brake fluid is spilled on the vehicle's
painted surfaces, the paint finish can be
damaged. Immediately wash off any
painted surface.
Warning
{
Negative Battery Cable Disconnection
WARNING: Battery posts, terminals and
related accessories can expose you to
chemicals including lead and lead
compounds, which are known to the
State of California to cause cancer and
birth defects or other reproductive harm.
Wash hands after handling. For more
information go to
Warning
{
Before disconnecting the negative battery
cable, turn off all features, turn the
ignition off, and remove the key,
if equipped, from the vehicle. If this is
not done, you or others could be injured,
and the vehicle could be damaged.
Battery - North America
The original equipment battery is
maintenance free. Do not remove the cap
and do not add fluid.
Refer to the replacement number shown on
the original battery label when a new
battery is needed. See Engine Compartment
Overview 0 336 for battery location.
See California Proposition 65 Warning 0 1.
Vehicle Care
353
1. Loosen and remove the negative battery
cable nut (1) at the battery sensor
connection.
3. Cover the negative battery cable clamp,
and negative battery post with a
non-conductive material to prevent any
contact with the negative battery cable.
Caution
If the battery is disconnected with the
ignition on or the vehicle in Retained
Accessory Power (RAP), the OnStar
back-up battery will be permanently
discharged and will need to be replaced.
2. Remove the negative battery cable (2)
from the battery sensor stud.
Negative Battery Cable Reconnection
3. Cover the negative battery cable
terminal, battery sensor stud, and
negative battery post with a
non-conductive material to prevent any
contact with the negative battery cable.
Caution
When reconnecting the battery:
1. Make sure the lamps, features, and
accessories are turned off.
.
Use the original nut from the vehicle
to secure the negative battery cable.
Do not use a different nut. If you
need a replacement nut, see your
dealer.
2. Turn the ignition off and remove the
key, if equipped.
For vehicles not equipped with the Stop/
Start system:
For vehicles equipped with the Stop/Start
system:
.
Tighten the nut with a hand tool. Do
not use an impact wrench or power
tools to tighten the nut.
The vehicle could be damaged if these
guidelines are not followed.
Caution
Do not use paints, lubricants, or corrosion
inhibitors on the nut that secures the
negative battery cable to the vehicle. This
could damage the vehicle.
1. Loosen the negative battery cable nut (1).
2. Remove the negative battery cable
clamp (2) from the negative battery post.
354
Vehicle Care
For vehicles equipped with the Stop/Start
system:
What to Use
Refer to Recommended Fluids and Lubricants
0 421 to determine what kind of lubricant
to use.
1. Install the negative battery cable to the
battery sensor stud.
2. Install the negative battery cable nut to
the battery sensor stud and tighten.
Front Axle
When to Check Lubricant
3. Turn the ignition on.
It is not necessary to regularly check the
front axle fluid unless a leak is suspected or
an unusual noise is heard. A fluid loss could
indicate a problem. Have it inspected and
repaired. This service can be complex. See
your dealer.
For vehicles not equipped with the Stop/
Start system:
1. Install the negative battery cable clamp
to the negative battery post.
2. Tighten the negative battery cable nut.
3. Turn the ignition on.
1. Fill Plug
2. Drain Plug
Do not directly power wash the transfer
case and/or front/rear axle output seals.
High pressure water can overcome the seals
and contaminate the fluid. Contaminated
fluid will decrease the life of the transfer
case and/or drive axles and should be
replaced.
To get an accurate reading, the vehicle
should be on a level surface.
Four-Wheel Drive
Transfer Case
If the level is below the bottom of the fill
plug (1) hole, located on the transfer case,
some lubricant will need to be added. Add
enough lubricant to raise the level to the
bottom of the fill plug (1) hole. Use care not
to overtighten the plug.
When to Check Lubricant
Refer to Maintenance Schedule 0 417 to
determine when to check the lubricant.
Rear Axle
When to Check Lubricant
When to Change Lubricant
It is not necessary to regularly check the
rear axle fluid unless a leak is suspected or
an unusual noise is heard. A fluid loss could
Refer to Maintenance Schedule 0 417 to
determine how often to change the
lubricant.
Vehicle Care
355
indicate a problem. Have it inspected and
repaired. This service can be complex. See
your dealer.
3. With the engine off, turn the ignition on,
but do not start the engine. Without
applying the regular brake, try to move
the shift lever out of P (Park) with
normal effort. If the shift lever moves
out of P (Park), contact your dealer for
service.
foot pressure from the regular brake
pedal. Do this until the vehicle is held by
the parking brake only.
To check the P (Park) mechanism's holding
ability: With the engine running, shift to
P (Park). Then release the parking brake
followed by the regular brake.
.
Do not directly power wash the transfer
case and/or front/rear axle output seals.
High pressure water can overcome the seals
and contaminate the fluid. Contaminated
fluid will decrease the life of the transfer
case and/or drive axles and should be
replaced.
Contact your dealer if service is required.
Park Brake and P (Park)
Mechanism Check
Wiper Blade Replacement
Windshield wiper blades should be replaced
periodically. See Maintenance Schedule
0 417.
Automatic Transmission Shift Lock
Control Function Check
(Mechanical Shifter)
Warning
{
When you are doing this check, the
vehicle could begin to move. You or
others could be injured and property
could be damaged. Make sure there is
room in front of the vehicle in case it
begins to roll. Be ready to apply the
regular brake at once should the vehicle
begin to move.
Replacement blades come in different types
and are removed in different ways. For
proper type and length, see Maintenance
Replacement Parts 0 422.
Warning
{
When you are doing this inspection, the
vehicle could move suddenly. If the
vehicle moves, you or others could be
injured.
Caution
Allowing the wiper arm to touch the
windshield when no wiper blade is
installed could damage the windshield.
Any damage that occurs would not be
covered by the vehicle warranty. Do not
allow the wiper arm to touch the
windshield.
Park on a fairly steep hill, with the vehicle
facing downhill. Keeping your foot on the
regular brake, set the parking brake.
To check the parking brake's holding
ability: With the engine running and the
transmission in N (Neutral), slowly remove
1. Before starting this check, be sure there
is enough room around the vehicle.
It should be parked on a level surface.
.
2. Apply the parking brake. Be ready to
apply the regular brake immediately if
the vehicle begins to move.
356
Vehicle Care
Front Wiper Blade Replacement
Glass Replacement
Gas Strut(s)
To replace the wiper blade:
If the windshield or front side glass must be
replaced, see your dealer to determine the
correct replacement glass.
Your vehicle may be equipped with gas
strut(s) to provide assistance in lifting and
holding open the hood/trunk/liftgate system
in full open position.
1. Pull the wiper assembly away from the
windshield.
Windshield Replacement
Warning
{
HUD System
If the gas struts that hold open the hood,
trunk, and/or liftgate fail, you or others
could be seriously injured. Take the
vehicle to your dealer for service
If equipped, the windshield is part of the
HUD system. If the windshield must be
replaced, get one that is designed for HUD
or the HUD image may look out of focus.
immediately. Visually inspect the gas
struts for signs of wear, cracks, or other
damage periodically. Check to make sure
the hood/trunk/liftgate is held open with
enough force. If struts are failing to hold
the hood/trunk/liftgate, do not operate.
Have the vehicle serviced.
Driver Assistance Systems
If the windshield needs to be replaced and
the vehicle is equipped with a front camera
sensor for the Driver Assistance Systems, a
GM replacement windshield is
recommended. The replacement windshield
must be installed according to GM
2. Lift up on the latch in the middle of the
wiper blade where the wiper arm
attaches.
specifications for proper alignment. If it is
not, these systems may not work properly,
they may display messages, or they may
not work at all. See your dealer for proper
windshield replacement.
3. With the latch open, pull the wiper blade
down toward the windshield far enough
to release it from the J-hooked end of
the wiper arm.
Caution
Do not apply tape or hang any objects
from gas struts. Also do not push down
or pull on gas struts. This may cause
damage to the vehicle.
4. Remove the wiper blade.
5. Reverse Steps 1–3 for wiper blade
replacement.
See Maintenance Schedule 0 417.
Vehicle Care
357
Bulb Replacement
For the proper type of replacement bulbs,
or any bulb changing procedure not listed in
this section, contact your dealer.
Caution
Do not replace incandescent bulbs with
aftermarket LED replacement bulbs. This
can cause damage to the vehicle electrical
system.
Hood
Liftgate
Halogen Bulbs
Warning
{
Headlamp Aiming
Halogen bulbs have pressurized gas inside
and can burst if you drop or scratch the
bulb. You or others could be injured. Be
sure to read and follow the instructions
on the bulb package.
Front Headlamp Aiming
Headlamp aim has been preset and should
need no further adjustment.
If the vehicle is damaged in a crash, the
headlamp aim may be affected.
If adjustment to the headlamps is necessary,
see your dealer.
LED Lighting
This vehicle has several LED lamps. For
replacement of any LED lighting assembly,
contact your dealer.
Trunk
