transmission GMC TERRAIN 2021 Service Manual

GMC Terrain/Terrain Denali Owner Manual(GMNA-Localizing-U.S./Canada/
Mexico-14420055) - 2021 - CRC - 11/13/20
Customer Information 353
If a Crash Occurs
If there has been an injury, call emergency
services for help. Do not leave the scene of
a crash until all matters have been taken
care of. Move the vehicle only if its position
puts you in danger, or you are instructed to
move it by a police officer.
Give only the necessary information to
police and other parties involved in the
crash.
For emergency towing seeRoadside
Assistance Program 0349.
Gather the following information:
.Driver name, address, and telephone
number
.Driver license number
.Owner name, address, and telephone
number
.Vehicle license plate number
.Vehicle make, model, and model year
.Vehicle Identification Number (VIN)
.Insurance company and policy number
.General description of the damage to the
other vehicle Choose a reputable repair facility that uses
quality replacement parts. See
“Collision
Parts” earlier in this section.
If the airbag has inflated, see What Will You
See after an Airbag Inflates? 051.
Managing the Vehicle Damage Repair
Process
In the event that the vehicle requires
damage repairs, GM recommends that you
take an active role in its repair. If you have
a pre-determined repair facility of choice,
take the vehicle there, or have it towed
there. Specify to the facility that any
required replacement collision parts be
original equipment parts, either new
Genuine GM parts or recycled original GM
parts. Remember, recycled parts will not be
covered by the GM vehicle warranty.
Insurance pays the bill for the repair, but
you must live with the repair. Depending on
your policy limits, your insurance company
may initially value the repair using
aftermarket parts. Discuss this with the
repair professional, and insist on Genuine
GM parts. Remember, if the vehicle is
leased, you may be obligated to have the vehicle repaired with Genuine GM parts,
even if your insurance coverage does not
pay the full cost.
If another party's insurance company is
paying for the repairs, you are not obligated
to accept a repair valuation based on that
insurance company's collision policy repair
limits, as you have no contractual limits
with that company. In such cases, you can
have control of the repair and parts choices
as long as the cost stays within reasonable
limits.
Publication Ordering Information
Service Manuals
Service manuals have the diagnosis and
repair information on the engine,
transmission, axle, suspension, brakes,
electrical system, steering system, body, etc.
Customer Literature
Owner’s manuals are written specifically for
owners and are intended to provide basic
operational information about the vehicle.
The owner’s manual includes the
Maintenance Schedule for all models.

GMC Terrain/Terrain Denali Owner Manual(GMNA-Localizing-U.S./Canada/
Mexico-14420055) - 2021 - CRC - 11/13/20
Customer Information 355
and notify General Motors of Canada
Company. Call Transport Canada at
1-800-333-0510; go to:
www.tc.gc.ca/recalls (English)
www.tc.gc.ca/rappels (French)
or write to:
Transport Canada
Motor Vehicle Safety Directorate
Defect Investigations and Recalls
Division
80 Noel Street
Gatineau
,QC J8Z 0A1
Reporting Safety Defects to
General Motors
In addition to notifying NHTSA (or Transport
Canada) in a situation like this, notify
General Motors.
In the U.S., call 1-800-462-8782, or write:
GMC Customer Assistance Center
P.O. Box 33172
Detroit, MI 48232-5172
In Canada, call 1-800-263-3777 (English) or
1-800-263-7854 (French), or write:General Motors of Canada Company
Customer Care Centre, Mail Code:
CA1-163-005
1908 Colonel Sam Drive
Oshawa, Ontario L1H 8P7
In Mexico, call 800-466-0812 or
800-466-0801.
In other Central America and Caribbean
Countries, call 52-555-901-2369.
Vehicle Data Recording and
Privacy
The vehicle has a number of computers that
record information about the vehicle’s
performance and how it is driven or used.
For example, the vehicle uses computer
modules to monitor and control engine and
transmission performance, to monitor the
conditions for airbag deployment and
deploy them in a crash, and, if equipped, to
provide antilock braking to help the driver
control the vehicle. These modules may
store data to help the dealer technician
service the vehicle or to help GM improve
safety or features. Some modules may also
store data about how the vehicle is
operated, such as rate of fuel consumptionor average speed. These modules may retain
personal preferences, such as radio presets,
seat positions, and temperature settings.
Cybersecurity
GM collects information about the use of
your vehicle including operational and safety
related information. We collect this
information to provide, evaluate, improve,
and troubleshoot our products and services
and to develop new products and services.
The protection of vehicle electronics systems
and customer data from unauthorized
outside electronic access or control is
important to GM. GM maintains appropriate
security standards, practices, guidelines and
controls aimed at defending the vehicle and
the vehicle service ecosystem against
unauthorized electronic access, detecting
possible malicious activity in related
networks, and responding to suspected
cybersecurity incidents in a timely,
coordinated and effective manner. Security
incidents could impact your safety or
compromise your private data. To minimize
security risks, please do not connect your
vehicle electronic systems to unauthorized
devices or connect your vehicle to any
unknown or untrusted networks (such as
Bluetooth, WIFI or similar technology). In

GMC Terrain/Terrain Denali Owner Manual(GMNA-Localizing-U.S./Canada/
Mexico-14420055) - 2021 - CRC - 11/13/20
OnStar 361
identify whether updates or changes are
available, or deliver updates or changes. An
active OnStar agreement constitutes consent
to these software updates or changes and
agreement that either OnStar or GM may
remotely deliver them to the vehicle.
Privacy
The complete OnStar Privacy Statement may
be found at www.onstar.com (U.S.),
or www.onstar.ca (Canada). We recommend
that you review it. If you have any
questions, call 1-888-4ONSTAR
(1-888-466-7827) or press
Qto speak
with an Advisor. Users of wireless
communications are cautioned that the
privacy of any information sent via wireless
cellular communications cannot be assured.
Third parties may unlawfully intercept or
access transmissions and private
communications without consent.
OnStar - Software Acknowledgements
To obtain the source code under GPL, LGPL,
MPL, and other open source licenses, that is
contained in this product, please visit http://
opensource.lge.com. In addition to the
source code, all referred license terms,
warranty disclaimers, and copyright notices
are available for download. This offer is valid for a period of three years after our last
shipment of this product. This offer is valid
to anyone in receipt of this information.
*Provided through LG Electronics Inc., who is
solely responsible for provisions of related
OSS compliance.

GMC Terrain/Terrain Denali Owner Manual(GMNA-Localizing-U.S./Canada/-
Mexico-14420055) - 2021 - CRC - 11/13/20
366 Index
Auto StopStop/Start System . . . . . . . . . . . . . . . . . . . . . 201
Automatic Dimming Mirrors . . . . . . . . . . . . . . . . . . . . . . . 25
Door Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Emergency Braking (AEB) . . . . . . . . . . . . . . 239
Headlamp System . . . . . . . . . . . . . . . . . . . . . . 118
Transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . 208
Transmission Fluid . . . . . . . . . . . . . . . . . . . . . 265
Automatic Transmission Manual Mode . . . . . . . . . . . . . . . . . . . . . . . . . . 211
Avoiding Untrusted Media Devices . . . . . . . .134
B
Battery Exterior Lighting Battery Saver . . . . . . . . 122
Load Management . . . . . . . . . . . . . . . . . . . . . . 121
Power Protection . . . . . . . . . . . . . . . . . . . . . . 122
Battery - North America . . . . . . . . . . . . . 273, 316
Blade Replacement, Wiper . . . . . . . . . . . . . . . 275
Bluetooth Overview . . . . . . . . . . . . . . . . . . . . . . . . . . 155, 156
Bluetooth Audio . . . . . . . . . . . . . . . . . . . . . . . . . 136
Brake Parking, Electric . . . . . . . . . . . . . . . . . . . . . . . . 212
System Warning Light . . . . . . . . . . . . . . . . . . 95
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 271 Antilock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212 Brakes (cont'd)
Assist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214
Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272
Braking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188 Automatic Emergency (AEB) . . . . . . . . . . . 239
Braking System Front Pedestrian (FPB) . . . . . . . . . . . . . . . . . 240
Break-In, New Vehicle . . . . . . . . . . . . . . . . . . . . 199
Bulb Replacement Front Turn Signal Lamps . . . . . . . . . . . . . . . 278
Halogen Bulbs . . . . . . . . . . . . . . . . . . . . . . . . . 277
Headlamp Aiming . . . . . . . . . . . . . . . . . . . . . . 277
Headlamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . 277
High Intensity Discharge (HID)Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 277
License Plate Lamps . . . . . . . . . . . . . . . . . . . 279
Taillamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 278
Buying New Tires . . . . . . . . . . . . . . . . . . . . . . . . 300
C
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81
California Perchlorate Materials Requirements . . . 258
California Proposition 65 Warning . . . . . . . . . . . . . . . . . . .258, 273, 316, Back Cover
Canadian Vehicle Owners . . . . . . . . . . . . . . . . . . . 1
Capacities and Specifications . . . . . . . . . . . . . 343 Carbon Monoxide
Engine Exhaust . . . . . . . . . . . . . . . . . . . . . . . . 207
Liftgate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Winter Driving . . . . . . . . . . . . . . . . . . . . . . . . . 194
Cargo Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Tie-Downs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Caution, Danger, and Warning . . . . . . . . . . . . . .2
Center Console Storage . . . . . . . . . . . . . . . . . . . .75
Chains, Tire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303
Charging Wireless . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Charging System Light . . . . . . . . . . . . . . . . . . . . 93
Check Engine Light (Malfunction Indicator) . . . . 93
Child Restraints
Infants and Young Children . . . . . . . . . . . . . 58
Lower Anchors and Tethers forChildren . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Older Children . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Securing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69, 70
Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Circuit Breakers . . . . . . . . . . . . . . . . . . . . . . . . . . 280
Cleaning Exterior Care . . . . . . . . . . . . . . . . . . . . . . . . . . . 322
Interior Care . . . . . . . . . . . . . . . . . . . . . . . . . . . 326
Climate Control Systems . . . . . . . . . . . . . . . . . .178 Air Conditioning . . . . . . . . . . . . . . . . . . . . . . . 178

GMC Terrain/Terrain Denali Owner Manual(GMNA-Localizing-U.S./Canada/-
Mexico-14420055) - 2021 - CRC - 11/13/20
368 Index
Driving (cont'd)Better Fuel Economy . . . . . . . . . . . . . . . . . . . 187
Characteristics and Towing Tips . . . . . . . . 249
Defensive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187
Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . 186
Hill and Mountain Roads . . . . . . . . . . . . . . 194
If the Vehicle is Stuck . . . . . . . . . . . . . . . . . 195
Impaired . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188
Loss of Control . . . . . . . . . . . . . . . . . . . . . . . . 190
Off-Road . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190
Off-Road Recovery . . . . . . . . . . . . . . . . . . . . . 189
Vehicle Load Limits . . . . . . . . . . . . . . . . . . . . 196
Wet Roads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193
Winter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194
Driving the Vehicle . . . . . . . . . . . . . . . . . . . . . . . . .2
Dual Automatic Climate Control System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
E
Electric Parking Brake . . . . . . . . . . . . . . . . . . . . . 212
Electric Parking Brake Light . . . . . . . . . . . . . . . 95
Electrical Equipment, Add-On . . . . . . . . . . . . 256
Electrical SystemEngine Compartment Fuse Block . . . . . . . 281
Fuses and Circuit Breakers . . . . . . . . . . . . . 280
Instrument Panel Fuse Block . . . . . . . . . . . 284
Overload . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 280
Rear Compartment Fuse Block . . . . . . . . . 285 Emergency
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 358
Engine Air Cleaner/Filter . . . . . . . . . . . . . . . . . . . . . . 265
Check Light (Malfunction Indicator) . . . . . 93
Compartment Overview . . . . . . . . . . . . . . . . 261
Coolant Temperature Gauge . . . . . . . . . . . . 91
Cooling System . . . . . . . . . . . . . . . . . . . . . . . . 267
Drive Belt Routing . . . . . . . . . . . . . . . . . . . . . 345
Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
Oil Life System . . . . . . . . . . . . . . . . . . . . . . . . 264
Oil Pressure Light . . . . . . . . . . . . . . . . . . . . . . . 98
Overheating . . . . . . . . . . . . . . . . . . . . . . . . . . . 270
Power Messages . . . . . . . . . . . . . . . . . . . . . . . 108
Running While Parked . . . . . . . . . . . . . . . . . 208
Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
Engine Air Filter Life System . . . . . . . . . . . . . 265
Entry Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Equipment, Towing . . . . . . . . . . . . . . . . . . . . . . 254
Event Data Recorders . . . . . . . . . . . . . . . . . . . . 356
Exit Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Extended Parking . . . . . . . . . . . . . . . . . . . . . . . . 207
Extender, Seat Belt . . . . . . . . . . . . . . . . . . . . . . . 46
Exterior Lamp Controls . . . . . . . . . . . . . . . . . . . . 116
Exterior Lighting Battery Saver . . . . . . . . . . . 122
F
Filter, Engine Air Cleaner . . . . . . . . . . . . . . . . . . . . . 265
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
Flashers, Hazard Warning . . . . . . . . . . . . . . . . . 119
Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303 Changing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 310
Floor Mats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 328
Fluid Automatic Transmission . . . . . . . . . . . . . . . 265
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272
Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 271
Fog Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Folding Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Folding Seatback . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Forward Collision Alert (FCA) System . . . . 237
Frequency Statement Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 354
Front Fog Lamp
Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Front Pedestrian Braking (FPB) System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240
Front Seats Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Heated and Ventilated . . . . . . . . . . . . . . . . . . 35
Front Turn Signal Lamps . . . . . . . . . . . . . . . . . 278
Fuel Additives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 247

GMC Terrain/Terrain Denali Owner Manual(GMNA-Localizing-U.S./Canada/-
Mexico-14420055) - 2021 - CRC - 11/13/20
374 Index
Storage Areas (cont'd)Center Console . . . . . . . . . . . . . . . . . . . . . . . . . 75
Convenience Net . . . . . . . . . . . . . . . . . . . . . . . . 76
Glove Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Roof Rack System . . . . . . . . . . . . . . . . . . . . . . . 76
Sunglasses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Storage Compartments . . . . . . . . . . . . . . . . . . . 74
Storing the Tire Sealant and
Compressor Kit . . . . . . . . . . . . . . . . . . . . . . . . . 310
Struts Gas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276
Stuck Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195
Summer Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . 288
Sun Visors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Sunglass Storage . . . . . . . . . . . . . . . . . . . . . . . . . 74
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
System Engine Air Filter Life . . . . . . . . . . . . . . . . . . . 265
Forward Collision Alert (FCA) . . . . . . . . . . . 237
Global Positioning . . . . . . . . . . . . . . . . . . . . . 148
Infotainment . . . . . . . . . . . . . . . . . . . . . . . . . . . 356
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Roof Rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Systems
Driver Assistance . . . . . . . . . . . . . . . . . . . . . . 231T
Tachometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Taillamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 278
Teen Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
Text Telephone (TTY) Users . . . . . . . . . . . . . . 348
Theft-Deterrent Systems . . . . . . . . . . . . . . . . . . .23Immobilizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287 All-Season . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287
Buying New Tires . . . . . . . . . . . . . . . . . . . . . . 300
Chains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303
Changing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 310
Compact Spare . . . . . . . . . . . . . . . . . . . . . . . . 315
Designations . . . . . . . . . . . . . . . . . . . . . . . . . . . 290
Different Size . . . . . . . . . . . . . . . . . . . . . . . . . . 301
If a Tire Goes Flat . . . . . . . . . . . . . . . . . . . . . 303
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 298
Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 293
Pressure Light . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Pressure Monitor Operation . . . . . . . . . . . 295
Pressure Monitor System . . . . . . . . . . . . . . 294
Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 298
Sealant and Compressor Kit . . . . . . . . . . . . 305
Sealant and Compressor Kit,
Storing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 310
Sidewall Labeling . . . . . . . . . . . . . . . . . . . . . . 288
Terminology and Definitions . . . . . . . . . . . 291 Tires (cont'd)
Uniform Tire Quality Grading . . . . . . . . . . 301
Wheel Alignment and Tire Balance . . . . 302
Wheel Replacement . . . . . . . . . . . . . . . . . . . . 302
When It Is Time for New Tires . . . . . . . . . 299
Winter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 288
Top Tier Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246
Tow/Haul Mode . . . . . . . . . . . . . . . . . . . . . . . . . . 211
Tow/Haul Mode Light . . . . . . . . . . . . . . . . . . . . 96
Towing
Driving Characteristics . . . . . . . . . . . . . . . . . 249
Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254
General Information . . . . . . . . . . . . . . . . . . . 248
Recreational Vehicle . . . . . . . . . . . . . . . . . . . 320
Trailer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 318
Traction Control System (TCS)/StabiliTrakLight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Off Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Traction Control/Electronic Stability
Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .214
Trademarks and License Agreements . . . . . 169
Trailer Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251
Transmission
Automatic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208
Fluid, Automatic . . . . . . . . . . . . . . . . . . . . . . . 265