ABS GMC TERRAIN 2021 User Guide

GMC Terrain/Terrain Denali Owner Manual(GMNA-Localizing-U.S./Canada/
Mexico-14420055) - 2021 - CRC - 11/13/20
266 Vehicle Care
How to Inspect/Replace the Engine Air
Cleaner/Filter
Do not start the engine or have the engine
running with the engine air cleaner/filter
housing open. Before removing the engine
air cleaner/filter, make sure that the engine
air cleaner/filter housing and nearby
components are free of dirt and debris. Do
not clean the engine air cleaner/filter or
components with water or compressed air.
1. Screws
2. Air Duct Clamp
3. Electrical Connector
To inspect or replace the engine air cleaner/
filter:1. Open the hood. See Hood0259.
2. Loosen the screw on the air duct clamp (2) and remove the air duct hose
from the cover.
3. Remove the four screws (1) and remove the air cleaner/filter cover, keeping the
wiring harness electrical connector (3)
connected to the sensor.
4. Pull straight up on the cover, and while holding the cover, remove the 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.
5. Inspect or replace the air cleaner/filter.
How to Reinstall the Engine Air Cleaner/
Filter
1. Align the air cleaner/filter with the indicated point on the base of the air
cleaner/filter housing and install the air
cleaner/filter. The outer air cleaner/filter
seal must be fitted properly in the air
cleaner/filter housing.
2. Align the air cleaner/filter housing cover tabs to the air cleaner/filter housing.
3. Install the air cleaner/filter housing cover using the four screws.
4. Slide the air duct onto the cover assembly and tighten the screw on the
air duct clamp.

GMC Terrain/Terrain Denali Owner Manual(GMNA-Localizing-U.S./Canada/
Mexico-14420055) - 2021 - CRC - 11/13/20
Vehicle Care 273
{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.
When the brake fluid falls to a low level,
the brake warning light comes on. See Brake
System Warning Light 095.
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 0331.
What to Add
Use only GM approved DOT 3 brake fluid
from a clean, sealed container. See
Recommended Fluids and Lubricants 0339.
{Warning
The wrong or contaminated brake fluid
could result in damage to the brake
system. This could result in the loss of
(Continued)
Warning (Continued)
braking leading to a possible injury.
Always use the proper GM approved
brake fluid.
Caution
If brake fluid is spilled on the vehicle's
painted surfaces, the paint finish can be
damaged. Immediately wash off any
painted surface.
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. SeeEngine Compartment
Overview 0261 for battery location.
For replacement of the battery, see your
dealer.
The vehicle has 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.
Stop/Start System
The vehicle has a Stop/Start system to shut
off the engine to help conserve fuel. See
Stop/Start System
0201.
{Warning
WARNING: Battery posts, terminals, and
related accessories contain lead and lead
compounds, chemicals known to the
State of California to cause cancer and
birth defects or other reproductive harm.
Batteries also contain other chemicals
known to the State of California to cause
cancer. WASH HANDS AFTER HANDLING.
For more information go to
www.P65Warnings.ca.gov/
passenger-vehicle.
See California Proposition 65 Warning 0258
and the back cover.

GMC Terrain/Terrain Denali Owner Manual(GMNA-Localizing-U.S./Canada/
Mexico-14420055) - 2021 - CRC - 11/13/20
278 Vehicle Care
LED Lighting
This vehicle has several LED lamps. For
replacement of any LED lighting assembly,
contact your dealer.
Front Turn Signal Lamps
To replace one of these bulbs:1. Open the hood. See Hood0259.
2. Remove the bulb access cap from the top
of the headlamp assembly by turning it
counterclockwise.
3. Remove the bulb from the bulb socketby pinching the tabs on either side of
the bulb and pull straight out.
4. Install the new bulb in the bulb socket.
5. Install the bulb access cap onto the headlamp assembly by turning clockwise.
Taillamps
To replace one of these lamps:
1. Open the liftgate. See Liftgate017.
2. Remove the two screw caps and two
screws from the taillamp assembly.
3. Pull the taillamp assembly out of the vehicle body.
4. Disconnect the lamp wiring harness.

GMC Terrain/Terrain Denali Owner Manual(GMNA-Localizing-U.S./Canada/
Mexico-14420055) - 2021 - CRC - 11/13/20
284 Vehicle Care
Instrument Panel Fuse Block
The instrument panel fuse block is under the
instrument panel on the driver side.
To access the fuses, press and release the
latch near the top center square.
Apply pressure to the two retaining tabs on
the sides of the cover, until the two
retaining tabs clear the sides of the
instrument panel. Allow the panel to move
downward and out of the way.
To reinstall the cover, reverse the steps.
The vehicle may not be equipped with all of
the fuses and relays shown.
FusesUsage
F01 DC AC inverter
F02 Front windows Fuses
Usage
F03 Trailer brake
F04 Heating, ventilation, and air conditioning blower
F05 –
F06 Central gateway module F07 –
F08 Body control module 3
F09 Amplifier F10 –
F11 –
F12 –
F13 –
F14 Electronic shifter F15 Transmission control module
F16 Front heated seats F17 Left data link connector
F18 Body control module 7
F19 Exterior mirror
F20 –

GMC Terrain/Terrain Denali Owner Manual(GMNA-Localizing-U.S./Canada/
Mexico-14420055) - 2021 - CRC - 11/13/20
316 Vehicle Care
When using a compact spare tire, the AWD
(if equipped), ABS, and Traction Control
systems may engage until the spare tire is
recognized by the vehicle, especially on
slippery roads. Adjust driving to reduce
possible wheel slip.
Caution
When the compact spare is installed, do
not take the vehicle through an
automatic car wash with guide rails. The
compact spare can get caught on the rails
which can damage the tire, wheel, and
other parts of the vehicle.
Do not use the compact spare on other
vehicles.
Do not mix the compact spare tire or wheel
with other wheels or tires. They will not fit.
Keep the spare tire and its wheel together.
Caution
Tire chains will not fit the compact spare.
Using them can damage the vehicle and
the chains. Do not use tire chains on the
compact spare.
Jump Starting
Jump Starting - North America
For more information about the vehicle
battery, see Battery - North America 0273.
If the battery has run down, try to use
another vehicle and some jumper cables to
start your vehicle. Be sure to use the
following steps to do it safely.
{Warning
WARNING: Battery posts, terminals, and
related accessories contain lead and lead
compounds, chemicals known to the
State of California to cause cancer and
birth defects or other reproductive harm.
Batteries also contain other chemicals
known to the State of California to cause
cancer. WASH HANDS AFTER HANDLING.
For more information go to
www.P65Warnings.ca.gov/
passenger-vehicle.
See California Proposition 65 Warning 0258
and the back cover.
{Warning
Batteries can hurt you. They can be
dangerous because:
.They contain acid that can burn you.
.They contain gas that can explode or
ignite.
.They contain enough electricity to
burn you.
If you do not follow these steps exactly,
some or all of these things can hurt you.
Caution
Ignoring these steps could result in costly
damage to the vehicle that would not be
covered by the vehicle warranty. Trying
to start the vehicle by pushing or pulling
it will not work, and it could damage the
vehicle.

GMC Terrain/Terrain Denali Owner Manual(GMNA-Localizing-U.S./Canada/
Mexico-14420055) - 2021 - CRC - 11/13/20
322 Vehicle Care
Caution
Towing the vehicle from the rear could
damage it. Also, repairs would not be
covered by the vehicle warranty. Never
have the vehicle towed from the rear.
Appearance Care
Exterior Care
Locks
Locks are lubricated at the factory. Use a
de-icing agent only when absolutely
necessary, and have the locks greased after
using. SeeRecommended Fluids and
Lubricants 0339.
Washing the Vehicle
To preserve the vehicle's finish, wash it
often and out of direct sunlight.
Caution
Do not use petroleum-based, acidic,
or abrasive cleaning agents as they can
damage the vehicle's paint, metal,
or plastic parts. If damage occurs, it
would not be covered by the vehicle
(Continued)
Caution (Continued)
warranty. Approved cleaning products can
be obtained from your dealer. Follow all
manufacturer directions regarding correct
product usage, necessary safety
precautions, and appropriate disposal of
any vehicle care product.
Caution
Avoid using high-pressure washes closer
than 30 cm (12 in) to the surface of the
vehicle. Use of power washers exceeding
8 274 kPa (1,200 psi) can result in
damage or removal of paint and decals.
If using an automatic car wash, follow the
car wash instructions. The windshield wiper
and rear window wiper, if equipped, must
be off. Remove any accessories that may be
damaged or interfere with the car wash
equipment.
Rinse the vehicle well, before washing and
after, to remove all cleaning agents
completely. If they are allowed to dry on
the surface, they could stain. Dry the finish with a soft, clean chamois or
an all-cotton towel to avoid surface
scratches and water spotting.
Cleaning Underhood Components
Caution
Do not power wash any component
under the hood that has this
e
symbol.
This could cause damage that would not
be covered by the vehicle warranty.
Solvents or aggressive cleaners may harm
underhood components. The usages of these
chemicals should be avoided.
Recommend water only.
A pressure washer may be used, but care
must be utilized. The following criteria must
be followed:
.Water pressure must be kept below
14,000 KPa (2,000 PSI).
.Water temperature must be below 80 °C
(180 °F).
.Spray nozzle with a 40 degree wide angle
spray pattern or wider must be used.
.Nozzle must be kept at least 30 cm (1 ft)
away from all surfaces.

GMC Terrain/Terrain Denali Owner Manual(GMNA-Localizing-U.S./Canada/-
Mexico-14420055) - 2021 - CRC - 11/13/20
Index 365
IndexA
About Driving the Vehicle . . . . . . . . . . . . . . . . . .2
Accessories and Modifications . . . . . . . . . . . 258
Accessory Power . . . . . . . . . . . . . . . . . . . . . . . . . 204
Adaptive Cruise Control . . . . . . . . . . . . . . . . . . 222
Add-On Electrical Equipment . . . . . . . . . . . . . 256
Additional InformationOnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 358
Additional Maintenance and Care . . . . . . . . 336
Adjustments Lumbar, Front Seats . . . . . . . . . . . . . . . . . . . . 32
Agreements Trademarks and License . . . . . . . . . . . . . . . 169
Air Cleaner/Filter, Engine . . . . . . . . . . . . . . . . 265
Air Conditioning . . . . . . . . . . . . . . . . . . . . . 178, 180
Air Filter
Life System . . . . . . . . . . . . . . . . . . . . . . . . . . . . 265
Air Filter, Passenger Compartment . . . . . . . .182
Air Vents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .182
Airbag System Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
How Does an Airbag Restrain? . . . . . . . . . . . 51
Passenger Sensing System . . . . . . . . . . . . . . 52
What Makes an Airbag Inflate? . . . . . . . . . 50
What Will You See after an AirbagInflates? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
When Should an Airbag Inflate? . . . . . . . . 50
Where Are the Airbags? . . . . . . . . . . . . . . . . 48 Airbags
Adding Equipment to the Vehicle . . . . . . . 56
Passenger Status Indicator . . . . . . . . . . . . . . 92
Readiness Light . . . . . . . . . . . . . . . . . . . . . . . . . 92
Servicing Airbag-Equipped Vehicles . . . . . . 55
System Check . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Alarm
Vehicle Security . . . . . . . . . . . . . . . . . . . . . . . . 22
Alert Lane Change . . . . . . . . . . . . . . . . . . . . . . . . . . . 242
Side Blind Zone (SBZA) . . . . . . . . . . . . . . . . . 242
All-Season Tires . . . . . . . . . . . . . . . . . . . . . . . . . . 287
All-Wheel Drive . . . . . . . . . . . . . . . . . . . . . . 212, 274
AM-FM Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Antenna Multi-band . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Antilock Brake System (ABS) . . . . . . . . . . . . . . 212 Warning Light . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Appearance Care Exterior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 322
Interior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 326
Apple CarPlay and Android Auto . . . . . . . . . 160
Assistance Program, Roadside . . . . . . . . . . . . 349
Assistance Systems for Driving . . . . . . . . . . 237
Assistance Systems for Parking and Backing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
Audio Bluetooth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

GMC Terrain/Terrain Denali Owner Manual(GMNA-Localizing-U.S./Canada/-
Mexico-14420055) - 2021 - CRC - 11/13/20
370 Index
Infotainment System . . . . . . . . . . . . . . . . . . . . 356
Instrument Cluster . . . . . . . . . . . . . . . . . . . . 85, 88
Instrument Panel Overview . . . . . . . . . . . . . . . . 4
Interior Rearview Mirrors . . . . . . . . . . . . . . . . . .25
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . 1, 123
J
Jump Starting - North America . . . . . . . . . . . 316
K
Keyless EntryRemote (RKE) System . . . . . . . . . . . . . . . . . . . . 7
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
L
Labeling, Tire Sidewall . . . . . . . . . . . . . . . . . . . 288
Lamps Courtesy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
Daytime Running (DRL) . . . . . . . . . . . . . . . . . 118
Dome . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
Exterior Controls . . . . . . . . . . . . . . . . . . . . . . . . 116
Exterior Lighting Battery Saver . . . . . . . . 122
Front Turn Signal . . . . . . . . . . . . . . . . . . . . . . 278
License Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . 279
Malfunction Indicator (Check
Engine) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
On Reminder . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120 Lamps (cont'd)
Taillamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 278
Lane Change Alert (LCA) . . . . . . . . . . . . . . . . . 242
Lane Keep Assist (LKA) . . . . . . . . . . . . . . . . . . . 244
Lane Keep Assist Light . . . . . . . . . . . . . . . . . . . . 96
Lap-Shoulder Belt . . . . . . . . . . . . . . . . . . . . . . . . . 42
LATCH System Replacing Parts after a Crash . . . . . . . . . . . 68
LATCH, Lower Anchors and Tethers for Children . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
LED Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 278
Liftgate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Lighting Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Exit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Illumination Control . . . . . . . . . . . . . . . . . . . 120
LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 278
Lights Airbag Readiness . . . . . . . . . . . . . . . . . . . . . . . 92
Antilock Brake System (ABS)Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Brake System Warning . . . . . . . . . . . . . . . . . 95
Charging System . . . . . . . . . . . . . . . . . . . . . . . 93
Check Engine (Malfunction Indicator) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Cruise Control . . . . . . . . . . . . . . . . . . . . . . . . . 100
Door Ajar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Electric Parking Brake . . . . . . . . . . . . . . . . . . . 95 Lights (cont'd)
Engine Oil Pressure . . . . . . . . . . . . . . . . . . . . . 98
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
Front Fog Lamp . . . . . . . . . . . . . . . . . . . . . . . . 100
High-Beam On . . . . . . . . . . . . . . . . . . . . . . . . . . 99
High/Low Beam Changer . . . . . . . . . . . . . . . 117
Hill Descent Control . . . . . . . . . . . . . . . . . . . . 96
Lane Keep Assist . . . . . . . . . . . . . . . . . . . . . . . . 96
Low Fuel Warning . . . . . . . . . . . . . . . . . . . . . . 99
Seat Belt Reminders . . . . . . . . . . . . . . . . . . . . 91
Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Service Electric Parking Brake . . . . . . . . . . . 95
StabiliTrak OFF . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Tire Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Tow/Haul Mode . . . . . . . . . . . . . . . . . . . . . . . . 96
Traction Control System
(TCS)/StabiliTrak . . . . . . . . . . . . . . . . . . . . . . 98
Traction Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Locks Automatic Door . . . . . . . . . . . . . . . . . . . . . . . . . 16
Delayed Locking . . . . . . . . . . . . . . . . . . . . . . . . 16
Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Lockout Protection . . . . . . . . . . . . . . . . . . . . . . 16
Power Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Loss of Control . . . . . . . . . . . . . . . . . . . . . . . . . . 190
Low Fuel Warning Light . . . . . . . . . . . . . . . . . . 99