2020 GMC TERRAIN Owner's Manual

GMC Terrain/Terrain Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13556230) - 2020 - CRC - 9/4/19
30 Keys, Doors, and Windows
Power Mirrors
To adjust each mirror:1. Press
jor|to select the
driver or passenger side mirror.
The indicator light will
illuminate.
2. Press the arrows on the control pad to move the mirror in the
desired direction.
3. Adjust each outside mirror so that a little of the vehicle and
the area behind it can be seen.
4. Press
jor|again to
deselect the mirror. Memory Mirrors
The vehicle may have memory
mirrors. See
Memory Seats 041.
Turn Signal Indicator
The vehicle may have a turn signal
indicator lamp built into the mirror
housing. The turn signal lamp
flashes when the turn signals or
hazard flashers are used.
Lane Change Alert (LCA)
The vehicle may have LCA. See
Lane Change Alert (LCA) 0243.
Side Blind Zone Alert
The vehicle may have Side Blind
Zone Alert. See Side Blind Zone
Alert (SBZA) 0243.
Folding Mirrors
Manual Folding Mirrors
The mirrors can be folded inward
toward the vehicle to prevent
damage when going through an
automatic car wash. Push the mirror
outward to return it to the original
position.
Heated Mirrors
If equipped, the heated outside
mirrors turn on when the rear
window defogger is on and help to
clear fog or frost from the surface of
the mirrors.
K:This button is on the climate
control panel.
See “Rear Window Defogger” under
Dual Automatic Climate Control
System 0155.
Automatic Dimming
Mirror
The vehicle has an automatic
dimming outside mirror on the driver
side. The mirror will adjust for the
glare of headlamps behind you.
Reverse Tilt Mirrors
If equipped with memory seats, the
passenger and/or driver mirror tilts
to a preselected position when the
vehicle is in R (Reverse). This
allows the curb to be seen when
parallel parking.

GMC Terrain/Terrain Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13556230) - 2020 - CRC - 9/4/19
Keys, Doors, and Windows 31
The mirror(s) return to the original
position when:
.The vehicle is shifted out of
R (Reverse), or remains in
R (Reverse) for about
30 seconds.
. The ignition is turned off.
. The vehicle is driven in
R (Reverse) above a set speed.
To turn this feature on or off, see
Vehicle Personalization 0135.Interior Mirrors
Interior Rearview Mirrors
Adjust the rearview mirror for a clear
view of the area behind the vehicle.
Do not spray glass cleaner directly
on the mirror. Use a soft towel
dampened with water.
Manual Rearview Mirror
Push the tab forward for daytime
use and pull it rearward for
nighttime use to avoid glare of the
headlamps from behind.
Automatic Dimming
Rearview Mirror
If equipped, automatic dimming
reduces the glare of headlamps
from behind. The dimming feature
comes on when the vehicle is
started.
Windows
{Warning
Never leave a child, a helpless
adult, or a pet alone in a vehicle,
especially with the windows
closed in warm or hot weather.
They can be overcome by the
extreme heat and suffer
permanent injuries or even death
from heat stroke.

GMC Terrain/Terrain Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13556230) - 2020 - CRC - 9/4/19
32 Keys, Doors, and Windows
The vehicle aerodynamics are
designed to improve fuel economy
performance. This may result in a
pulsing sound when either rear
window is down and the front
windows are up. To reduce the
sound, open either a front window
or the sunroof, if equipped.
Power Windows
{Warning
Children could be seriously
injured or killed if caught in the
path of a closing window. Never
leave the Remote Keyless Entry
(RKE) transmitter in a vehicle with
children. When there are children
in the rear seat, use the window
lockout switch to prevent
operation of the windows. See
Keys07.The power windows work when the
ignition is on, in ACC/ACCESSORY,
or in Retained Accessory Power
(RAP). See Retained Accessory
Power (RAP) 0187.
Using the window switch, press to
open or pull to close the window.
The windows may be temporarily
disabled if they are used repeatedly
within a short time.
Window Lockout
This feature stops the rear door
passenger window switches from
working.
Press
2to engage the rear
window lockout feature. The
indicator light is on when engaged.
Press
2again to disengage.
Window Express Movement
All windows can be opened without
holding the window switch. Press
the switch down fully and quickly
release to express open the
window.

GMC Terrain/Terrain Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13556230) - 2020 - CRC - 9/4/19
Keys, Doors, and Windows 33
If equipped, pull the window switch
up fully and quickly release to
express close the window.
Briefly press or pull the window
switch in the same direction to stop
that window’s express movement.
Window Automatic Reversal
System
The express-close feature will
reverse window movement if it
comes in contact with an object.
Extreme cold or ice could cause the
window to auto-reverse. The
window will operate normally after
the object or condition is removed.
Automatic Reversal System
Override
{Warning
If automatic reversal system
override is active, the window will
not reverse automatically. You or
others could be injured and the
window could be damaged.
Before using automatic reversal(Continued)
Warning (Continued)
system override, make sure that
all people and obstructions are
clear of the window path.
When the engine is on, override the
automatic reversal system by pulling
and holding the window switch if
conditions prevent it from closing.
Programming the Power
Windows
Programming may be necessary if
the vehicle’ s battery has been
disconnected or discharged. If the
window will not express close,
program each express-close
window:
1. Close all doors.
2. Turn the ignition on or to ACC/ ACCESSORY.
3. Partially open the window to be programmed. Then close it and
continue to pull the switch
briefly after the window has
fully closed. 4. Open the window and continue
to press the switch briefly after
the window has fully opened.
Remote Window Operation
If equipped, this feature allows all
the windows to be opened remotely.
If enabled in vehicle personalization,
press and hold
Kon the RKE
transmitter. See Vehicle
Personalization 0135.
Sun Visors
Pull the sun visor down to block
glare. Detach the sun visor from the
center mount to pivot to the side
window and, if equipped, extend
along the rod.

GMC Terrain/Terrain Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13556230) - 2020 - CRC - 9/4/19
34 Keys, Doors, and Windows
Roof
Sunroof
1. Sunroof Switch
2. Sunshade Switch
If equipped, the sunroof only
operates when the ignition is on or
in ACC/ACCESSORY, or when
Retained Accessory Power (RAP) is
active. SeeIgnition Positions 0179
and
Retained Accessory Power (RAP)
0 187. Sunroof Switch
Vent :
From the closed position,
press and release
e(1) to vent
the sunroof. Press and release
g(1) to close the vent.
Express-Open/Express-Close : To
express-open the sunroof, press
and release
e(1). Press and
release
e(1) at any time to stop
movement. To express-close the
sunroof, press and release
g(1).
Press and release
g(1) at any
time to stop movement.
Open/Close (Manual Mode) : To
open the sunroof, press and hold
e(1) until the sunroof reaches
the desired position. To close the
sunroof, press and hold
g(1).
Comfort Stop : The sunroof has a
comfort stop feature that stops the
sunroof from opening fully. Press
and release the rear of
gto
move the sunroof to the partially
opened comfort stop position. Pressing the rear of
gagain will
open the sunroof fully. If the
sunshade is not fully open when the
comfort stop feature is pressed the
second time, the sunshade will open
fully.
Sunshade Switch
Express-open/Express-close : To
express-open the sunshade, press
and release
r(2). Press and
release
r(2) at any time to stop
movement. To express-close the
sunshade, press and release
Q(2). Press and release
Q(2) at any time to stop
movement.
Open/Close (Manual Mode) : To
open the sunshade, press and hold
r(2) until the sunshade reaches
the desired position. To close the
sunshade, press and hold
Q(2).

GMC Terrain/Terrain Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13556230) - 2020 - CRC - 9/4/19
Keys, Doors, and Windows 35
When the sunroof is opened, an air
deflector will automatically raise.
The air deflector will retract when
the sunroof is closed.
The sunroof cannot be opened or
closed if the vehicle has an
electrical failure.
Automatic Reversal System
The sunroof has an automatic
reversal system that is only active
when the sunroof is operated in
express-close mode.
If an object is in the path while
express closing, the reversal system
will detect the object, stop, and
open the sunroof slightly.
If frost or other conditions prevent
closing, override the feature by
closing the sunroof in manual mode.
To stop movement, release the
switch.
Dirt and debris may collect on the
sunroof seal or in the track. This
could cause an issue with sunroof
operation or noise. It could also plug
the water drainage system.
Periodically open the sunroof and
remove any obstacles or loose
debris. Wipe the sunroof seal and
roof sealing area using a clean
cloth, mild soap, and water. Do not
remove grease from the sunroof.

GMC Terrain/Terrain Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13556230) - 2020 - CRC - 9/4/19
36 Seats and Restraints
Seats and
Restraints
Head Restraints
Head Restraints . . . . . . . . . . . . . . . 37
Front Seats
Seat Adjustment . . . . . . . . . . . . . . . 39
Power Seat Adjustment . . . . . . . . 39
Lumbar Adjustment . . . . . . . . . . . . 40
Reclining Seatbacks . . . . . . . . . . . 40
Memory Seats . . . . . . . . . . . . . . . . . 41
Heated and Ventilated FrontSeats . . . . . . . . . . . . . . . . . . . . . . . . . 44
Folding Seatback . . . . . . . . . . . . . . 45
Rear Seats
Rear Seats . . . . . . . . . . . . . . . . . . . . 46
Heated Rear Seats . . . . . . . . . . . . 49
Seat Belts
Seat Belts . . . . . . . . . . . . . . . . . . . . . 50
How to Wear Seat Belts Properly . . . . . . . . . . . . . . . . . . . . . . 51
Lap-Shoulder Belt . . . . . . . . . . . . . 53
Seat Belt Use During Pregnancy . . . . . . . . . . . . . . . . . . . . 56
Seat Belt Extender . . . . . . . . . . . . . 57
Safety System Check . . . . . . . . . . 57 Seat Belt Care . . . . . . . . . . . . . . . . . 57
Replacing Seat Belt System
Parts after a Crash . . . . . . . . . . . 58
Airbag System
Airbag System . . . . . . . . . . . . . . . . . 58
Where Are the Airbags? . . . . . . . 60
When Should an AirbagInflate? . . . . . . . . . . . . . . . . . . . . . . . 62
What Makes an Airbag Inflate? . . . . . . . . . . . . . . . . . . . . . . . 62
How Does an Airbag Restrain? . . . . . . . . . . . . . . . . . . . . . 63
What Will You See after an Airbag Inflates? . . . . . . . . . . . . . . 63
Passenger Sensing System . . . 64
Servicing the Airbag-Equipped Vehicle . . . . . . . . . . . . . . . . . . . . . . . 68
Adding Equipment to the Airbag-Equipped Vehicle . . . . . 69
Airbag System Check . . . . . . . . . . 70
Replacing Airbag System Parts after a Crash . . . . . . . . . . . . . . . . . 70
Child Restraints
Older Children . . . . . . . . . . . . . . . . . 70
Infants and Young Children . . . . 72
Child Restraint Systems . . . . . . . 74
Where to Put the Restraint . . . . . 76
Lower Anchors and Tethers forChildren (LATCH System) . . . . 77 Replacing LATCH System Parts
After a Crash . . . . . . . . . . . . . . . . . 84
Securing Child Restraints (With the Seat Belt in the
Rear Seat) . . . . . . . . . . . . . . . . . . . 85
Securing Child Restraints (With the Seat Belt in the
Front Seat) . . . . . . . . . . . . . . . . . . . 87

GMC Terrain/Terrain Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13556230) - 2020 - CRC - 9/4/19
Seats and Restraints 37
Head Restraints
The vehicle’s front seats have
adjustable head restraints in the
outboard seating positions.
{Warning
With head restraints that are not
installed and adjusted properly,
there is a greater chance that
occupants will suffer a neck/
spinal injury in a crash. Do not
drive until the head restraints for
all occupants are installed and
adjusted properly.
If your vehicle has rear head
restraints that fold down, always
return them to the full upright
position whenever an occupant is
seated in the seat.
Adjust the head restraint so that the
top of the restraint is at the same
height as the top of the occupant's
head. This position reduces the
chance of a neck injury in a crash.
Front Seats
The vehicle's front seats have
adjustable head restraints in the
outboard seating positions.
The height of the head restraint can
be adjusted.
To raise or lower the head restraint,
press the button located on the side
of the head restraint and pull up or
push the head restraint down, and
release the button. Pull and push on
the head restraint after the button is
released to make sure that it is
locked in place.
The front seat outboard head
restraints are not removable.