2020 GMC TERRAIN lane assist

GMC Terrain/Terrain Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13556230) - 2020 - CRC - 9/4/19
Driving and Operating 247
is ready to assist. LKA may assist
by gently turning the steering wheel
if the vehicle approaches a detected
lane marking.
Ais amber when
assisting. It may also provide a
Lane Departure Warning (LDW)
alert by flashing
Aamber if the
vehicle crosses a detected lane
marking. Additionally, there may be
three beeps, or the driver seat may
pulse three times, on the right or
left, depending on the lane
departure direction.
Take Steering
The LKA system does not
continuously steer the vehicle.
If LKA does not detect active driver
steering, an alert and chime may be
provided. Steer the vehicle to
dismiss. LKA may become
temporarily unavailable after
repeated take steering alerts.
When the System Does Not
Seem to Work Properly
The system performance may be
affected by:
. Close vehicles ahead.
. Sudden lighting changes, such
as when driving through tunnels.
. Banked roads.
. Roads with poor lane markings,
such as two-lane roads.
A system unavailable message may
display if the camera is blocked.
The LKA system does not need
service.
A camera blocked message may
display if the camera is blocked.
Some driver assistance systems
may have reduced performance or
not work at all. An LKA or LDW
unavailable message may display if
the systems are temporarily
unavailable. This message could be
due to a blocked camera. The LKA
system does not need service.
Clean the outside of the windshield
behind the rearview mirror. LKA assistance and/or LDW alerts
may occur due to tar marks,
shadows, cracks in the road,
temporary or construction lane
markings, or other road
imperfections. This is normal system
operation; the vehicle does not need
service. Turn LKA off if these
conditions continue.

GMC Terrain/Terrain Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13556230) - 2020 - CRC - 9/4/19
Driving and Operating 263
.It is recommended to perform
the first oil change before heavy
towing.
. During the first 800 km (500 mi)
of trailer towing, do not drive
over 80 km/h (50 mph) and do
not make starts at full throttle.
. Vehicles can tow in D (Drive).
If the transmission downshifts
too often, a lower gear may be
selected using Manual Mode
See Manual Mode 0205.
If equipped, the following driver
assistance features should be
turned off when towing a trailer:
. Adaptive Cruise Control (ACC)
. Super Cruise Control
. Lane Keep Assist (LKA)
. Park Assist
. Automatic Parking Assist (APA)
. Reverse Automatic
Braking (RAB) If equipped, the following driver
assistance features should be
turned to alert or off when towing a
trailer:
.
Automatic Emergency
Braking (AEB)
. Intelligent Brake Assist (IBA)
. Front Pedestrian Braking (FPB)
If equipped with Lane Change Alert
(LCA), the LCA detection zones that
extend back from the side of the
vehicle do not move further back
when a trailer is towed. Use caution
while changing lanes when towing a
trailer.
If equipped with Rear Cross Traffic
Alert (RCTA), use caution while
backing up when towing a trailer, as
the RCTA detection zones that
extend out from the back of the
vehicle do not move further back
when a trailer is towed.{Warning
To prevent serious injury or death
from carbon monoxide (CO),
when towing a trailer: . Do not drive with the
liftgate, trunk/hatch,
or rear-most window open.
. Fully open the air outlets on
or under the instrument
panel.
. Adjust the climate control
system to a setting that
brings in only outside air.
See “Climate Control
Systems” in the Index.
For more information about
carbon monoxide, see Engine
Exhaust 0191.
Towing a trailer requires experience.
The combination of the vehicle and
trailer is longer and not as
responsive as the vehicle itself. Get
used to the handling and braking of

GMC Terrain/Terrain Denali Owner Manual (GMNA-Localizing-U.S./Canada/-
Mexico-13556230) - 2020 - CRC - 9/4/19
Index 415
H
Halogen Bulbs . . . . . . . . . . . . . . . . . . 303
Hazard Warning Flashers . . . . . . . 147
Head Restraints . . . . . . . . . . . . . . . . . 37
HeadlampsAiming . . . . . . . . . . . . . . . . . . . . . . . . 303
Automatic . . . . . . . . . . . . . . . . . . . . . 147
Bulb Replacement . . . . . . . . . . . . 303
Daytime RunningLamps (DRL) . . . . . . . . . . . . . . . . 146
Flash-to-Pass . . . . . . . . . . . . . . . . . 146
High Intensity Discharge (HID) Lighting . . . . . . . . . . . . . . . 304
High-Beam On Light . . . . . . . . . . 123
High/Low Beam Changer . . . . . 146
Lamps On Reminder . . . . . . . . . 123
Heated Rear Seats . . . . . . . . . . . . . . . . . . . . . 49
Steering Wheel . . . . . . . . . . . . . . . . . 95
Heated and Ventilated Front Seats . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Heated Mirrors . . . . . . . . . . . . . . . . . . . 30
Heater Engine . . . . . . . . . . . . . . . . . . . . . . . . 186
Heating . . . . . . . . . . . . . . . . . . . . 153, 155
High-Beam On Light . . . . . . . . . . . . 123
Hill and Mountain Roads . . . . . . . . 172
Hill Descent Control (HDC) . . . . . 213 Hill Descent Control Light . . . . . . . 119
Hill Start Assist (HSA) . . . . . . . . . . 209
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . 276
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
How to Wear Seat Belts
Properly . . . . . . . . . . . . . . . . . . . . . . . . 51
HVAC . . . . . . . . . . . . . . . . . . . . . . 153, 155
I
Ignition Positions . . . . . . . . . . . . . . . 179
Immobilizer . . . . . . . . . . . . . . . . . . . . . . 28
Indicator
Pedestrian Ahead . . . . . . . . . . . . 120
Vehicle Ahead . . . . . . . . . . . . . . . . .119
Infants and Young Children, Restraints . . . . . . . . . . . . . . . . . . . . . . 72
Information
Publication Ordering . . . . . . . . . . 394
Infotainment . . . . . . . . . . . . . . . . . . . . 152
Infotainment System . . . . . . . . . . . . 398
Instrument Cluster . . . . . . . . . 103, 107
Instrument Panel Overview . . . . . . . 5
Interior Rearview Mirrors . . . . . . . . . 31
Introduction . . . . . . . . . . . . . . . . . . . . . . . 2
J
Jump Starting - North America . . . . . . . . . . . . . . . . . . . . . . . 349
K
Keyless EntryRemote (RKE) System . . . . . . . . . . 8
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
L
Labeling, Tire Sidewall . . . . . . . . . . 316
Lamps Courtesy . . . . . . . . . . . . . . . . . . . . . . 149
Daytime Running (DRL) . . . . . . 146
Dome . . . . . . . . . . . . . . . . . . . . . . . . . 149
Exterior Controls . . . . . . . . . . . . . . 144
Exterior Lighting BatterySaver . . . . . . . . . . . . . . . . . . . . . . . 151
Front Turn Signal . . . . . . . . . . . . . 304
License Plate . . . . . . . . . . . . . . . . . 305
Malfunction Indicator
(Check Engine) . . . . . . . . . . . . . .115
On Reminder . . . . . . . . . . . . . . . . . 123
Reading . . . . . . . . . . . . . . . . . . . . . . 149
Taillamps . . . . . . . . . . . . . . . . . . . . . 304
Lane Change Alert (LCA) . . . . . . . 243
Lane Keep Assist (LKA) . . . . . . . . 245
Lane Keep Assist Light . . . . . . . . . 119
Lap-Shoulder Belt . . . . . . . . . . . . . . . 53
LATCH System Replacing Parts after aCrash . . . . . . . . . . . . . . . . . . . . . . . . . 84

GMC Terrain/Terrain Denali Owner Manual (GMNA-Localizing-U.S./Canada/-
Mexico-13556230) - 2020 - CRC - 9/4/19
416 Index
LATCH, Lower Anchors andTethers for Children . . . . . . . . . . . . 77
LED Lighting . . . . . . . . . . . . . . . . . . . . 304
Liftgate . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Lighting Entry . . . . . . . . . . . . . . . . . . . . . . . . . 150
Exit . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
Illumination Control . . . . . . . . . . . 149
LED . . . . . . . . . . . . . . . . . . . . . . . . . . 304
Lights Airbag Readiness . . . . . . . . . . . . . .113
Antilock Brake System
(ABS) Warning . . . . . . . . . . . . . . .118
Brake System Warning . . . . . . . .117
Charging System . . . . . . . . . . . . . .115
Check Engine (Malfunction Indicator) . . . . . . . . . . . . . . . . . . . . .115
Cruise Control . . . . . . . . . . . . . . . . 124
Diesel Exhaust Fluid (DEF) . . . 122
Door Ajar . . . . . . . . . . . . . . . . . . . . . 124
Electric Parking Brake . . . . . . . . .118
Engine Oil Pressure . . . . . . . . . . 122
Flash-to-Pass . . . . . . . . . . . . . . . . . 146
Front Fog Lamp . . . . . . . . . . . . . . 123
High-Beam On . . . . . . . . . . . . . . . . 123
High/Low Beam Changer . . . . . 146
Hill Descent Control . . . . . . . . . . .119
Lane Keep Assist . . . . . . . . . . . . . .119 Lights (cont'd)
Low Fuel Warning . . . . . . . . . . . . 122
Seat Belt Reminders . . . . . . . . . . .113
Security . . . . . . . . . . . . . . . . . . . . . . 123
Service Electric Parking
Brake . . . . . . . . . . . . . . . . . . . . . . . .118
StabiliTrak OFF . . . . . . . . . . . . . . . 120
Tire Pressure . . . . . . . . . . . . . . . . . 121
Tow/Haul Mode . . . . . . . . . . . . . . . .119
Traction Control System (TCS)/StabiliTrak . . . . . . . . . . . . 120
Traction Off . . . . . . . . . . . . . . . . . . . 120
Wait to Start . . . . . . . . . . . . . . . . . . 121
Locks
Automatic Door . . . . . . . . . . . . . . . . . 20
Delayed Locking . . . . . . . . . . . . . . . . 19
Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Lockout Protection . . . . . . . . . . . . . . 20
Power Door . . . . . . . . . . . . . . . . . . . . . 19
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Loss of Control . . . . . . . . . . . . . . . . . 167
Low Fuel Warning Light . . . . . . . . . 122
Lower Anchors and Tethers for Children (LATCH
System) . . . . . . . . . . . . . . . . . . . . . . . . 77
Lumbar Adjustment . . . . . . . . . . . . . . 40 Front Seats . . . . . . . . . . . . . . . . . . . . . 40M
MaintenanceRecords . . . . . . . . . . . . . . . . . . . . . . 380
Maintenance and Care Additional . . . . . . . . . . . . . . . . . . . . . 374
Maintenance Schedule . . . . . . . . . 368 Recommended Fluids andLubricants . . . . . . . . . . . . . . . . . . . 377
Malfunction Indicator Lamp . . . . . 115
Manual Mode . . . . . . . . . . . . . . . . . . . 205
Memory Seats . . . . . . . . . . . . . . . . . . . 41
Messages Engine Power . . . . . . . . . . . . . . . . 134
Vehicle . . . . . . . . . . . . . . . . . . . . . . . 134
Vehicle Speed . . . . . . . . . . . . . . . . 135
Mirrors Automatic Dimming . . . . . . . . . . . . . 30
Automatic DimmingRearview . . . . . . . . . . . . . . . . . . . . . . 31
Convex . . . . . . . . . . . . . . . . . . . . . . . . . 29
Folding . . . . . . . . . . . . . . . . . . . . . . . . . 30
Heated . . . . . . . . . . . . . . . . . . . . . . . . . 30
Manual Rearview . . . . . . . . . . . . . . . 31
Power . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Tilt in Reverse . . . . . . . . . . . . . . . . . . 30
Mirrors, Interior Rearview . . . . . . . . 31
Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 214 Driver Control . . . . . . . . . . . . . . . . . 214

GMC Terrain/Terrain Denali Owner Manual (GMNA-Localizing-U.S./Canada/-
Mexico-13556230) - 2020 - CRC - 9/4/19
Index 419
Service (cont'd)Accessories and
Modifications . . . . . . . . . . . . . . . . 275
Climate Control System . . . . . . . 153
Doing Your Own Work . . . . . . . . 275
Maintenance Records . . . . . . . . 380
Maintenance, General
Information . . . . . . . . . . . . . . . . . . 366
Parts Identification . . . . . . . . . . . . 381
Scheduling Appointments . . . . . 391
Service Electric Parking Brake Light . . . . . . . . . . . . . . . . . . . . 118
Services Special Application . . . . . . . . . . . 374
Servicing the Airbag . . . . . . . . . . . . . 68
Shifting Into Park . . . . . . . . . . . . . . . . . . . . . . 187
Out of Park . . . . . . . . . . . . . . . . . . . 188
Side Blind Zone Alert (SBZA) . . . 243
Signals, Turn and Lane-Change . . . . . . . . . . . . . . . . . 148
Spare Tire Compact . . . . . . . . . . . . . . . . . . . . . . 348
Special Application Services . . . . 374
Specifications and Capacities . . . . . . . . . . . . . . . . . . . . . 382
Speedometer . . . . . . . . . . . . . . . . . . . 110 StabiliTrak
OFF Light . . . . . . . . . . . . . . . . . . . . . 120
Start Assist, Hill . . . . . . . . . . . . . . . . . 209
Start Vehicle, Remote . . . . . . . . . . . 15
Starter Switch Check . . . . . . . . . . . 299
Starting the Engine . . . . . . . . . . . . . 181
Steering . . . . . . . . . . . . . . . . . . . . . . . . 165 Heated Wheel . . . . . . . . . . . . . . . . . . 95
Wheel Adjustment . . . . . . . . . . . . . . 95
Wheel Controls . . . . . . . . . . . . . . . . . 95
Stop/Start System . . . . . . . . . . . . . . 184
Storage Areas
Cargo Cover . . . . . . . . . . . . . . . . . . . . 91
Center Console . . . . . . . . . . . . . . . . . 91
Convenience Net . . . . . . . . . . . . . . . 92
Glove Box . . . . . . . . . . . . . . . . . . . . . . 90
Roof Rack System . . . . . . . . . . . . . . 93
Sunglasses . . . . . . . . . . . . . . . . . . . . . 90
Storage Compartments . . . . . . . . . . 90
Storing the Tire Sealant and Compressor Kit . . . . . . . . . . . . . . . 342
Struts Gas . . . . . . . . . . . . . . . . . . . . . . . . . . . 302
Stuck Vehicle . . . . . . . . . . . . . . . . . . . 174
Summer Tires . . . . . . . . . . . . . . . . . . 316
Sun Visors . . . . . . . . . . . . . . . . . . . . . . . 33
Sunglass Storage . . . . . . . . . . . . . . . . 90
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . 3
System
Forward CollisionAlert (FCA) . . . . . . . . . . . . . . . . . . 237
Infotainment . . . . . . . . . . . . . 152, 398
Roof Rack . . . . . . . . . . . . . . . . . . . . . . 93
Systems
Driver Assistance . . . . . . . . . . . . . 230
T
Tachometer . . . . . . . . . . . . . . . . . . . . . 110
Taillamps . . . . . . . . . . . . . . . . . . . . . . . 304
Text Telephone (TTY) Users . . . . 388
Theft-Deterrent Systems . . . . . . . . . 28Immobilizer . . . . . . . . . . . . . . . . . . . . . 28
Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . 314 All-Season . . . . . . . . . . . . . . . . . . . . 315
Buying New Tires . . . . . . . . . . . . . 330
Chains . . . . . . . . . . . . . . . . . . . . . . . . 334
Changing . . . . . . . . . . . . . . . . . . . . . 343
Compact Spare . . . . . . . . . . . . . . . 348
Designations . . . . . . . . . . . . . . . . . 318
Different Size . . . . . . . . . . . . . . . . . 331
If a Tire Goes Flat . . . . . . . . . . . . 335
Inspection . . . . . . . . . . . . . . . . . . . . 328
Pressure . . . . . . . . . . . . . . . . . . . . . . 321
Pressure Light . . . . . . . . . . . . . . . . 121