2021 GMC TERRAIN power steering

GMC Terrain/Terrain Denali Owner Manual(GMNA-Localizing-U.S./Canada/
Mexico-14420055) - 2021 - CRC - 11/13/20
200 Driving and Operating
Information Center (DIC). When the vehicle
is shifted into P (Park), the ignition system
will turn off.
The vehicle may have an electric steering
column lock. The lock is activated when the
vehicle is turned off and either front door is
opened. A sound may be heard as the lock
actuates or releases. The steering column
lock may not release with the wheels turned
off center. If this happens, the vehicle may
not start. Move the steering wheel from left
to right while attempting to start the
vehicle. If this does not work, the vehicle
needs service.
Do not turn the engine off when the vehicle
is moving. This will cause a loss of power
assist in the brake and steering systems and
disable the airbags.
If the vehicle must be turned off in an
emergency:1. Brake using a firm and steady pressure. Do not pump the brakes repeatedly. This
may deplete power assist, requiring
increased brake pedal force. 2. Shift the vehicle to N (Neutral). This can
be done while the vehicle is moving.
After shifting to N (Neutral), firmly apply
the brakes and steer the vehicle to a
safe location.
3. Come to a complete stop and shift to P (Park).
4. Set the parking brake. See Electric
Parking Brake 0212. Press ENGINE
START/STOP to turn the vehicle off.
{Warning
Turning off the vehicle while moving may
cause loss of power assist in the brake
and steering systems and disable the
airbags. While driving, only shut the
vehicle off in an emergency.
If the vehicle cannot be pulled over and
must be shut off while driving, press and
hold ENGINE START/STOP for longer than
two seconds, or press twice in five seconds.
ACC/ACCESSORY (Amber Indicator Light) :
This mode allows you to use some electrical
accessories when the engine is off. With the ignition off, pressing the button
one time without the brake pedal applied
will place the ignition system in ACC/
ACCESSORY.
The ignition will switch from ACC/
ACCESSORY to OFF after five minutes to
prevent battery rundown.
ON/RUN/START (Green Indicator Light) :
This
mode is for starting and driving. With the
ignition off and the brake pedal applied,
pressing the button once will turn the
ignition on. Once engine cranking begins,
release the button. Engine cranking will
continue until the engine starts. See Starting
the Engine 0201. The ignition will then
remain in on.
Service Mode
This power mode is available for service and
diagnostics, and to verify the proper
operation of the malfunction indicator lamp
as may be required for emission inspection
purposes. With the vehicle off and the brake
pedal not applied, pressing and holding
ENGINE START/STOP for more than
five seconds will place the vehicle in Service
Mode. The instruments and audio systems
will operate as they do in ON/RUN, but the
vehicle will not be able to be driven. The

GMC Terrain/Terrain Denali Owner Manual(GMNA-Localizing-U.S./Canada/
Mexico-14420055) - 2021 - CRC - 11/13/20
212 Driving and Operating
Automatic Engine Grade Braking
Automatic Engine Grade Braking assists
when driving downhill. It maintains vehicle
speed by automatically implementing a shift
pattern that uses the engine and the
transmission to slow the vehicle. The system
will automatically command downshifts to
reduce vehicle speed. The normal shift
pattern will return once the vehicle is on a
low grade or when the accelerator pedal is
pressed.
While in the Electronic Range Select (ERS)
mode, grade braking is deactivated, allowing
the driver to select a range and limiting the
highest gear available. Grade braking is
available for normal driving and in Tow/
Haul Mode.
SeeAutomatic Transmission 0208.
Drive Systems
All-Wheel Drive
For information on All-Wheel Drive (AWD),
see Driver Mode Control 0218.
Brakes
Antilock Brake System (ABS)
The Antilock Brake System (ABS) helps
prevent a braking skid and maintain steering
while braking hard.
ABS performs a system check when the
vehicle is first driven. A momentary motor
or clicking noise may be heard while this
test is going on, and the brake pedal may
move slightly. This is normal.
If there is a problem with ABS, this warning
light stays on. See Antilock Brake System
(ABS) Warning Light 096.
ABS does not change the time needed to
get a foot on the brake pedal and does not
always decrease stopping distance. If you
get too close to the vehicle ahead, there will
not be enough time to apply the brakes if
that vehicle suddenly slows or stops. Always
leave enough room ahead to stop, even
with ABS.
Using ABS
Do not pump the brakes. Just hold the brake
pedal down firmly. Hearing or feeling ABS
operate is normal.
Braking in Emergencies
ABS allows steering and braking at the same
time. In many emergencies, steering can
help even more than braking.
Electric Parking Brake
The Electric Parking Brake (EPB) can always
be applied, even if the vehicle is off. In case
of insufficient electrical power, the EPB

GMC Terrain/Terrain Denali Owner Manual(GMNA-Localizing-U.S./Canada/
Mexico-14420055) - 2021 - CRC - 11/13/20
Vehicle Care 285
FusesUsage
F21 Body control module 4
F22 –
F23 –
F24 Sensing and diagnostic module
F25 Occupancy sensor
F26 –
F27 Power seats
F28 Rear windows
F29 –
F30 Front heated seats switch F31 Steering wheel controls
F32 Body control module 8
F33 Heating, ventilation, and air conditioning
F34 Passive entry, passive start
F35 Liftgate latch
F36 Wireless charger module/ USB accessory
F37 Cigarette lighter Fuses
Usage
F38 OnStar
F39 Instrument panel USB
F40 Camera module/Liftgate module
F41 Park assist module/Center stack display/Heating,
ventilation and air
conditioner display/
Universal garage door
opener/Overhead control
switchbank
F42 Radio
Relays Usage
K01 –
K02 Retained accessory power
K03 Liftgate
K04 –
K05 –
Circuit Breakers Usage CB1 –
CB2 –Rear Compartment Fuse Block
The rear compartment fuse block is behind a
trim panel on the side of the rear
compartment.

GMC Terrain/Terrain Denali Owner Manual(GMNA-Localizing-U.S./Canada/
Mexico-14420055) - 2021 - CRC - 11/13/20
Vehicle Care 325
Caution (Continued)
tire dressing, always wipe off any
overspray from all painted surfaces on
the vehicle.
Wheels and Wheel Trim
Use a soft, clean cloth with mild soap and
water to clean the wheels. After rinsing
thoroughly with clean water, dry with a
soft, clean towel. A wax may then be
applied.
Caution
Chrome wheels and chrome wheel trim
may be damaged if the vehicle is not
washed after driving on roads that have
been sprayed with magnesium chloride or
calcium chloride. These are used on roads
for conditions such as dust and ice.
Always wash the chrome with soap and
water after exposure.
Caution
To avoid surface damage on wheels and
wheel trim, do not use strong soaps,
chemicals, abrasive polishes, cleaners,
(Continued)
Caution (Continued)
or brushes. Use only GM approved
cleaners. Do not drive the vehicle through
an automatic car wash that uses silicon
carbide tire/wheel cleaning brushes.
Damage could occur and the repairs
would not be covered by the vehicle
warranty.
Brake System
Visually inspect brake lines and hoses for
proper attachment, connections, binding,
leaks, cracks, chafing, etc. Inspect disc brake
pads for wear and rotors for surface
condition. Inspect all other brake parts for
cracks and leaks.
Steering, Suspension, and Chassis
Components
Visually inspect steering, suspension, and
chassis components for damaged, loose,
or missing parts or signs of wear at least
once a year.
Inspect power steering for proper
attachment, connections, binding, leaks,
cracks, chafing, etc.Visually check constant velocity joint boots
and axle seals for leaks.
Body Component Lubrication
Lubricate all key lock cylinders, hood hinges,
liftgate hinges, steel fuel door hinge, and
power assist step hinges, unless the
components are plastic. Applying silicone
grease on weatherstrips with a clean cloth
will make them last longer, seal better, and
not stick or squeak.
Underbody Maintenance
At least twice a year, spring and fall, use
plain water to flush any corrosive materials
from the underbody. Take care to
thoroughly clean any areas where mud and
other debris can collect.
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 axles and should be replaced.

GMC Terrain/Terrain Denali Owner Manual(GMNA-Localizing-U.S./Canada/
Mexico-14420055) - 2021 - CRC - 11/13/20
332 Service and Maintenance
Tire Rotation and Required Services
Every 12 000 km/7,500 mi
Rotate the tires, if recommended for the
vehicle, and perform the following services.
SeeTire Rotation 0298.
.Check engine oil level and oil
life percentage. If needed, change engine
oil and filter, and reset oil life system.
See Engine Oil 0262 and
Engine Oil Life System 0264.
.If equipped with the engine air filter life
system, check the air filter
life percentage. If necessary, replace the
engine air filter and reset the engine air
filter life system. See Engine Air Filter Life
System 0265. If the vehicle is not
equipped with the engine air filter life
system, inspect the engine air cleaner
filter. See Engine Air Cleaner/Filter 0265.
.Check engine coolant level. See Cooling
System 0267.
.Check windshield washer fluid level. See
Washer Fluid 0271.
.Check tire inflation pressures. See Tire
Pressure 0293.
.Inspect tire wear. See Tire Inspection
0 298.
.Visually check for fluid leaks.
.Inspect engine air cleaner filter. See
Engine Air Cleaner/Filter 0265.
.Inspect brake system. See Exterior Care
0 322.
.Visually inspect steering, suspension, and
chassis components for damage, including
cracks or tears in the rubber boots, loose
or missing parts, or signs of wear at least
once a year. See Exterior Care0322.
.Inspect power steering for proper
attachment, connections, binding, leaks,
cracks, chafing, etc.
.Visually inspect halfshafts and drive
shafts for excessive wear, lubricant leaks,
and/or damage including: tube dents or
cracks, constant velocity joint or universal
joint looseness, cracked or missing boots,
loose or missing boot clamps, center
bearing excessive looseness, loose or
missing fasteners, and axle seal leaks.
.Check restraint system components. See
Safety System Check 046.
.Visually inspect fuel system for damage
or leaks.
.Visually inspect exhaust system and
nearby heat shields for loose or damaged
parts.
.Lubricate body components. See Exterior
Care 0322.
.Check starter switch. See Starter Switch
Check 0274.
.Check parking brake and automatic
transmission park mechanism. See Park
Brake and P (Park) Mechanism Check
0 274.
.Check accelerator pedal for damage, high
effort, or binding. Replace if needed.
.Visually inspect gas strut for signs of
wear, cracks, or other damage. Check the
hold open ability of the strut. If the hold
open ability is low, service the gas strut.
See Gas Strut(s) 0276.
.Check tire sealant expiration date,
if equipped. See Tire Sealant and
Compressor Kit 0305.
.Inspect sunroof track and seal,
if equipped. See Sunroof027.

GMC Terrain/Terrain Denali Owner Manual(GMNA-Localizing-U.S./Canada/-
Mexico-14420055) - 2021 - CRC - 11/13/20
Index 367
Climate Control Systems (cont'd)Dual Automatic . . . . . . . . . . . . . . . . . . . . . . . . 180
Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81
Cluster, Instrument . . . . . . . . . . . . . . . . . . . 85, 88
Collision Damage Repair . . . . . . . . . . . . . . . . . 352
Compact Spare Tire . . . . . . . . . . . . . . . . . . . . . . . 315
Compartments Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Compass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81
Compressor Kit, Tire Sealant . . . . . . . . . . . . . 305
Connected Services Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . 363
Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 364
Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 362
Connections
Connected Services . . . . . . . . . . . . . . . . . . . . 363
Control Hill Descent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217
Traction and Electronic Stability . . . . . . . 214
Control Light
Hill Descent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Control of a Vehicle . . . . . . . . . . . . . . . . . . . . . 188
Controls Steering Wheel . . . . . . . . . . . . . . . . . . . . . . . . 126
Convenience Net . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Convex Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Coolant
Engine Temperature Gauge . . . . . . . . . . . . . 91
Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178, 180
Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . . 267
Courtesy Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . 120
Courtesy Transportation Program . . . . . . . . . 351
Cover Cargo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Coverage Explanations . . . . . . . . . . . . . . . . . . . 150
Covers Winter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202
Cruise Control . . . . . . . . . . . . . . . . . . . . . . . . . . . 220 Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Cruise Control, Adaptive . . . . . . . . . . . . . . . . . 222
Cupholders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Customer Assistance . . . . . . . . . . . . . . . . . . . . . 348 Offices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 348
Text Telephone (TTY) Users . . . . . . . . . . . . 348
Customer Information Publications Ordering Information . . . . . 353
Customer Satisfaction Procedure . . . . . . . . . 346
Cybersecurity . . . . . . . . . . . . . . . . . . . . . . . . . . . . 355
D
Damage Repair, Collision . . . . . . . . . . . . . . . . . 352
Danger, Warning, and Caution . . . . . . . . . . . . . .2
Data Collection
Infotainment System . . . . . . . . . . . . . . . . . . 356 Data Collection (cont'd)
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 356
Data Recorders, Event . . . . . . . . . . . . . . . . . . . 356
Database Coverage Explanations . . . . . . . . . 150
Daytime Running Lamps (DRL) . . . . . . . . . . . . 118
Defensive Driving . . . . . . . . . . . . . . . . . . . . . . . . .187
Delayed Locking . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Destination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .142
Diagnostics Connected Services . . . . . . . . . . . . . . . . . . . . 364
Distracted Driving . . . . . . . . . . . . . . . . . . . . . . . . .187
Dome Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
Door Ajar Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Delayed Locking . . . . . . . . . . . . . . . . . . . . . . . . 16
Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Power Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Drive Belt Routing, Engine . . . . . . . . . . . . . . . 345
Drive Systems All-Wheel Drive . . . . . . . . . . . . . . . . . . . . 212, 274
Driver
Teen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
Driver Assistance Systems . . . . . . . . . . . . . . . . 231
Driver Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . 186
Driver Information Center (DIC) . . . . . 100, 105
Driver Mode Control . . . . . . . . . . . . . . . . . . . . . .218
Driving Assistance Systems . . . . . . . . . . . . . . . . . . . . 237

GMC Terrain/Terrain Denali Owner Manual(GMNA-Localizing-U.S./Canada/-
Mexico-14420055) - 2021 - CRC - 11/13/20
Index 373
RoadsDriving, Wet . . . . . . . . . . . . . . . . . . . . . . . . . . . 193
Roadside Assistance Program . . . . . . . . . . . . 349
Roof Sunroof . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Roof Rack System . . . . . . . . . . . . . . . . . . . . . . . . . 76
Rotation, Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . 298
Routing, Engine Drive Belt . . . . . . . . . . . . . . . 345
Running the Vehicle While Parked . . . . . . . 208
S
Safety Defects Reporting Canadian Government . . . . . . . . . . . . . . . . . 354
General Motors . . . . . . . . . . . . . . . . . . . . . . . . 355
U.S. Government . . . . . . . . . . . . . . . . . . . . . . . 354
Safety Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Safety System Check . . . . . . . . . . . . . . . . . . . . . 46
Satellite Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Scheduling Appointments . . . . . . . . . . . . . . . . 350
Sealant Kit, Tire . . . . . . . . . . . . . . . . . . . . . . . . . . 305
Seat Belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Extender . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
How to Wear Seat Belts Properly . . . . . . . 41
Lap-Shoulder Belt . . . . . . . . . . . . . . . . . . . . . . . 42
Reminders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Replacing after a Crash . . . . . . . . . . . . . . . . . 47
Use During Pregnancy . . . . . . . . . . . . . . . . . . 46 Seats
Adjustment, Front . . . . . . . . . . . . . . . . . . . . . . 30
Folding Seatback . . . . . . . . . . . . . . . . . . . . . . . . 36
Head Restraints . . . . . . . . . . . . . . . . . . . . . . . . . 29
Heated and Ventilated Front . . . . . . . . . . . . 35
Heated, Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Lumbar Adjustment, Front . . . . . . . . . . . . . . 32
Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Power Adjustment, Front . . . . . . . . . . . . . . . . 31
Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Reclining Seatbacks . . . . . . . . . . . . . . . . . . . . . 32
Securing Child Restraints . . . . . . . . . . . . . . 69, 70
Security Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 358
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Vehicle Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .183 Accessories and Modifications . . . . . . . . . 258
Climate Control System . . . . . . . . . . . . . . . . 178
Doing Your Own Work . . . . . . . . . . . . . . . . . 259
Maintenance Records . . . . . . . . . . . . . . . . . . 341
Maintenance, General Information . . . . . 330
Parts Identification . . . . . . . . . . . . . . . . . . . . . 342
Scheduling Appointments . . . . . . . . . . . . . . 350
Service Electric Parking Brake Light . . . . . . . 95
Services Special Application . . . . . . . . . . . . . . . . . . . . . 336 Servicing System . . . . . . . . . . . . . . . . . . . . . . . . 149
Servicing the Airbag . . . . . . . . . . . . . . . . . . . . . . .55
Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
Shifting
Into Park . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204
Out of Park . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
Side Blind Zone Alert (SBZA) . . . . . . . . . . . . . 242
Signals, Turn and Lane-Change . . . . . . . . . . . . 119
Software Updates . . . . . . . . . . . . . . . . . . . . . . . . 130
Spare Tire Compact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315
Special Application Services . . . . . . . . . . . . . . 336
Specifications and Capacities . . . . . . . . . . . . . 343
Speedometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
StabiliTrak OFF Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Start Assist, Hill . . . . . . . . . . . . . . . . . . . . . . . . . . .214
Start Vehicle, Remote . . . . . . . . . . . . . . . . . . . . . . 13
Starter Switch Check . . . . . . . . . . . . . . . . . . . . . 274
Starting the Engine . . . . . . . . . . . . . . . . . . . . . . 201
Steering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188 Heated Wheel . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Wheel Adjustment . . . . . . . . . . . . . . . . . . . . . . 79
Wheel Controls . . . . . . . . . . . . . . . . . . . . . . . . . 79
Steering Wheel Controls . . . . . . . . . . . . . . . . . 126
Stop/Start System . . . . . . . . . . . . . . . . . . . . . . . 201
Storage Areas
Cargo Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75