2022 GMC TERRAIN ECU

GMC Terrain/Terrain Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-16540740) - 2023 - CRC - 6/16/22
Keys, Doors, and Windows 7
Keys, Doors, and
Windows
Keys and Locks
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Remote Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Remote Key Operation . . . . . . . . . . . . . . . . . . 8
Remote Vehicle Start . . . . . . . . . . . . . . . . . . . 14
Door Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Power Door Locks . . . . . . . . . . . . . . . . . . . . . . . 17
Delayed Locking . . . . . . . . . . . . . . . . . . . . . . . . 17
Automatic Door Locks . . . . . . . . . . . . . . . . . . . 17
Lockout Protection . . . . . . . . . . . . . . . . . . . . . . 18
Safety Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Doors
Liftgate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Vehicle Security
Vehicle Security . . . . . . . . . . . . . . . . . . . . . . . . 23
Vehicle Alarm System . . . . . . . . . . . . . . . . . . 23
Immobilizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Immobilizer Operation . . . . . . . . . . . . . . . . . . 24
Exterior Mirrors
Convex Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . 25
Power Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Folding Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . 25
Heated Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . 26
Automatic Dimming Mirror . . . . . . . . . . . . . 26Reverse Tilt Mirrors . . . . . . . . . . . . . . . . . . . . 26
Interior Mirrors
Interior Rearview Mirrors . . . . . . . . . . . . . . . 26
Manual Rearview Mirror . . . . . . . . . . . . . . . . 26
Automatic Dimming Rearview Mirror . . . 26
Windows
Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Power Windows . . . . . . . . . . . . . . . . . . . . . . . . 27
Sun Visors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Roof
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Keys and Locks
Keys
{Warning
Leaving children in a vehicle with a
Remote Keyless Entry (RKE) transmitter is
dangerous and children or others could
be seriously injured or killed. They could
operate the power windows or other
controls or make the vehicle move. The
windows will function with the RKE
transmitter in the vehicle, and children or
others could be caught in the path of a
closing window. Do not leave children in
a vehicle with an RKE transmitter.

GMC Terrain/Terrain Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-16540740) - 2023 - CRC - 6/16/22
12 Keys, Doors, and Windows
2. Remove the key lock cylinder cap on thedriver door handle. See Door Locks015.
Insert the vehicle key of the remote key
into the key lock cylinder on the driver
door handle and turn the key,
counterclockwise, to the unlock position
five times within 10 seconds.
The DIC displays REMOTE LEARN
PENDING, PLEASE WAIT.
3. Wait for 10 minutes until the DIC displays PRESS ENGINE START BUTTON TO
LEARN and then press ENGINE
START/STOP.
The DIC display will again show REMOTE
LEARN PENDING, PLEASE WAIT.
4. Repeat Step 2 two additional times. After the third time all previously known
remote keys will no longer work with
the vehicle. Remaining remote keys can
be relearned during the next steps.
The DIC display should now show READY
FOR REMOTE # 1.
5. Place the new remote key into thecupholder.
6. Press ENGINE START/STOP. When the remote key is learned the DIC display
will show that it is ready to program the
next remote key.
7. Remove the remote key from the cupholder and press
KorQon the
remote key.
To program additional remote keys,
repeat Steps 4–6.
When all additional remote keys are
programmed, press and hold ENGINE
START/STOP for 12 seconds to exit
programming mode.
8. Put the key back into the remote key. 9. Replace the key lock cylinder cap. See
Door Locks 015.
Starting the Vehicle with a Low Remote
Key Battery
When the vehicle is started, if the remote
key battery is weak, the DIC may display
NO REMOTE DETECTED or NO REMOTE KEY
WAS DETECTED PLACE KEY IN TRANSMITTER
POCKET THEN START YOUR VEHICLE. The DIC
may also display REPLACE BATTERY IN
REMOTE KEY.
To start the vehicle:
1. Place the remote key in the cupholder.

GMC Terrain/Terrain Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-16540740) - 2023 - CRC - 6/16/22
Keys, Doors, and Windows 17
3. Slide the cap forward and press theforward edge to install the cap in place.
4. Release the door handle.
5. Check that the cap is secure.
Free-Turning Locks
The door key lock cylinder turns freely when
either the wrong key is used, or the correct
key is not fully inserted. The free-turning
door lock feature prevents the lock cylinder
from being forced open. To reset the lock
cylinder, ensure the correct key is fully
inserted into the lock cylinder. Rotate the
key until you feel the lock cylinder click
back into place. Remove the key and
reinsert fully, rotate the key to unlock the
vehicle.
Power Door Locks
Q: Press to lock the doors. The indicator
light in the switch will come on when the
door is locked.
K: Press to unlock the doors.
If equipped, the fuel door is also locked or
unlocked using these features.
Delayed Locking
This feature delays the actual locking of the
doors until five seconds after all doors are
closed.
Delayed locking can only be turned on when
the Open Door Anti-Lockout feature has
been turned off. When
Qis pressed on the power door lock
switch with the door open, a chime will
sound three times indicating that delayed
locking is active.
The doors will then lock automatically
five seconds after all doors are closed. If a
door is reopened before five seconds have
elapsed, the five-second timer will reset once
all the doors are closed again.
Press
Qon the door lock switch again,
or press
Qon the remote key, to override
this feature and lock the doors immediately.
Delayed locking can be programmed. To
view available settings from the
infotainment screen, touch Settings >
Vehicle > Power Door Locks.
Automatic Door Locks
The doors will lock automatically when all
doors are closed, the ignition is on, and the
vehicle is shifted out of P (Park).
If a vehicle door is unlocked and then
opened and closed, the doors will lock either
when your foot is removed from the brake
or the vehicle speed becomes faster than
13 km/h (8 mph).

GMC Terrain/Terrain Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-16540740) - 2023 - CRC - 6/16/22
20 Keys, Doors, and Windows
Power Liftgate Operation
{Warning
You or others could be injured if caught
in the path of the power liftgate. Make
sure there is no one in the way of the
liftgate as it is opening and closing.
Caution
Driving with an open and unsecured
liftgate may result in damage to the
power liftgate components.
The power liftgate switch is on the driver
door. The vehicle must be in P (Park). The
taillamps flash when the power liftgate
moves.
The modes are:
.MAX: Opens to maximum height.
.3/4: Opens to a reduced height that can
be set from 3/4 to fully open. Use to
prevent the liftgate from opening into
overhead obstructions such as a garage
door or roof-mounted cargo. The liftgate
can be manually opened all the way.
.OFF: Opens manually only.
To power open or close the liftgate, select
MAX or 3/4 mode.
.Pressbtwice quickly on the remote
key until the liftgate moves.
.Press8on the driver door. The driver
door must be unlocked.
.Press the touch pad on the bottom of the
liftgate after unlocking all doors.
If equipped with Keyless Access, a locked
vehicle can be opened if the remote key
is within 1 m (3 ft) of the liftgate.
.Presslon the bottom of the liftgate
next to the pull cup to close.
Press any liftgate button, the touch pad,
or
bon the remote key while the liftgate
is moving to stop it. Pressing any liftgate
button or pressing
btwice quickly on the
remote key again restarts the operation in
the reverse direction. Pressing the touch pad
on the liftgate handle will restart the
motion, but only in the opening direction.
Caution
Manually forcing the liftgate to open or
close during a power cycle can damage
the vehicle. Allow the power cycle to
complete.

GMC Terrain/Terrain Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-16540740) - 2023 - CRC - 6/16/22
Keys, Doors, and Windows 23
To operate, kick your foot straight up in one
swift motion under the rear bumper
between the left exhaust pipe and the
license plate, then pull it back.
.Do not sweep your foot side to side.
.Do not keep your foot under the bumper;
the liftgate will not activate.
.Do not touch the liftgate until it has
stopped moving.
.This feature may be temporarily disabled
under some conditions. If the liftgate
does not respond to the kick, open or
close the liftgate by another method or
start the vehicle. The feature will be
re-enabled.
When closing the liftgate using this feature,
there will be a short delay. The taillamps
will flash and a chime will sound. Step away
from the liftgate before it starts moving.
Vehicle Security
This vehicle has theft-deterrent features;
however, they do not make the vehicle
impossible to steal.
Vehicle Alarm System
This vehicle has an anti-theft alarm system.
The indicator light, on the instrument panel
near the windshield, indicates the status of
the system:
Off : Alarm system is disarmed.
On Solid : Vehicle is secured during the
delay to arm the system.
Fast Flash : Vehicle is unsecured. A door, the
hood, or the liftgate is open.
Slow Flash : Alarm system is armed.
Arming the Alarm System
1. Turn off the vehicle.
2. Lock the vehicle in one of two ways:
.Use the RKE transmitter.
.With a door open, press the
interior
Q.
3. After 30 seconds the alarm system will arm, and the indicator light will begin to
slowly flash indicating the alarm system
is operating. Pressing
Qon the RKE
transmitter a second time will bypass
the 30-second delay and immediately
arm the alarm system.
The vehicle alarm system will not arm if the
doors are locked with the key.
If the driver door is opened without first
unlocking with the RKE transmitter, the horn
will chirp and the lights will flash to indicate
pre-alarm. If the vehicle is not started,
or the door is not unlocked by pressing
K
on the RKE transmitter during the 10-second
pre-alarm, the alarm will be activated.
If a door, the hood, or the liftgate is opened
without first disarming the system, the turn
signals will flash and the horn will sound for
about 30 seconds. The alarm system will
then re-arm to monitor for the next
unauthorized event.
Disarming the Alarm System
To disarm the alarm system or turn off the
alarm if it has been activated:

GMC Terrain/Terrain Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-16540740) - 2023 - CRC - 6/16/22
24 Keys, Doors, and Windows
.PressKon the RKE transmitter.
.Start the vehicle.
To avoid setting off the alarm by accident:
.Lock the vehicle after all occupants have
left the vehicle and all doors are closed.
.Always unlock a door with the RKE
transmitter.
Unlocking the driver door with the key will
not disarm the system or turn off the alarm.
How to Detect a Tamper Condition
IfKis pressed on the RKE transmitter and
the horn chirps and the lights flash three
times, an alarm occurred previously while
the alarm system was armed.
If the alarm has been activated, a message
will appear on the Driver Information
Center (DIC).
Immobilizer
See Radio Frequency Statement 0347.
Immobilizer Operation
This vehicle has a passive theft-deterrent
system.
The system does not have to be manually
armed or disarmed. The vehicle is automatically immobilized
when the vehicle is turned off.
The immobilization system is disarmed
when the ignition is on or in accessory
mode and a valid remote key is present in
the vehicle.
The security light, in the instrument cluster,
comes on if there is a problem with arming
or disarming the theft-deterrent system.
The system has one or more remote keys
matched to an immobilizer control unit in
your vehicle. Only a correctly matched
remote key will start the vehicle. If the
remote key is ever damaged, you may not
be able to start your vehicle.
When trying to start the vehicle, the
security light may come on briefly when the
ignition is turned on.
If the engine does not start and the security
light stays on, there is a problem with the
system. Turn the ignition off and try again.
If the vehicle will not change ignition
modes, and the remote key appears to be
undamaged, try another remote key. Or,
you may try placing the remote key in the
cupholder. See
“Starting the Vehicle with a
Low Remote Key Battery” inRemote Key
Operation 08.
If the ignition mode will not change with
the other remote key or in the cupholder,
your vehicle needs service. If the ignition
does change modes, the first remote key
may be faulty. See your dealer who can
service the theft-deterrent system and have
a new remote key programmed to the
vehicle.
It is possible for the immobilizer system to
learn new or replacement remote keys. Up
to eight remote keys can be programmed
for the vehicle. To program additional
remote keys, see “Programming Remote
Keys to the Vehicle” underRemote Key
Operation 08.
Do not leave the remote key or device that
disarms or deactivates the theft-deterrent
system in the vehicle.

GMC Terrain/Terrain Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-16540740) - 2023 - CRC - 6/16/22
Seats and Restraints 31
Seats and Restraints
Head Restraints
Head Restraints . . . . . . . . . . . . . . . . . . . . . . . . . 31
Front Seats
Seat Adjustment . . . . . . . . . . . . . . . . . . . . . . . . 32
Power Seat Adjustment . . . . . . . . . . . . . . . . . 33
Reclining Seatbacks . . . . . . . . . . . . . . . . . . . . . 34
Lumbar Adjustment . . . . . . . . . . . . . . . . . . . . . 35
Memory Seats . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Heated and Ventilated Front Seats . . . . . 38
Folding Seatback . . . . . . . . . . . . . . . . . . . . . . . 39
Rear Seats
Rear Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Heated Rear Seats . . . . . . . . . . . . . . . . . . . . . . 42
Seat Belts
Seat Belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
How to Wear Seat Belts Properly . . . . . . 43
Lap-Shoulder Belt . . . . . . . . . . . . . . . . . . . . . . . 45
Seat Belt Use During Pregnancy . . . . . . . . 47
Seat Belt Extender . . . . . . . . . . . . . . . . . . . . . . 47
Safety System Check . . . . . . . . . . . . . . . . . . . 48
Seat Belt Care . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Replacing Seat Belt System Parts after aCrash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Airbag System
Airbag System . . . . . . . . . . . . . . . . . . . . . . . . . 49
Where Are the Airbags? . . . . . . . . . . . . . . . . 50
When Should an Airbag Inflate? . . . . . . . . 51
What Makes an Airbag Inflate? . . . . . . . . . 52
How Does an Airbag Restrain? . . . . . . . . . . 52
What Will You See after an AirbagInflates? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Passenger Sensing System . . . . . . . . . . . . . . 54
Servicing the Airbag-Equipped Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Adding Equipment to the Airbag-Equipped Vehicle . . . . . . . . . . . . . . 57
Airbag System Check . . . . . . . . . . . . . . . . . . . 58
Replacing Airbag System Parts after a Crash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Child Restraints
Older Children . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Infants and Young Children . . . . . . . . . . . . 60
Child Restraint Systems . . . . . . . . . . . . . . . . 62
Where to Put the Restraint . . . . . . . . . . . . 64
Lower Anchors and Tethers for Children(LATCH System) . . . . . . . . . . . . . . . . . . . . . . 65
Replacing LATCH System Parts After a Crash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Securing Child Restraints (With the Seat Belt in the Rear Seat) . . . . . . . . . . . . . . . . . 71
Securing Child Restraints (With the Seat Belt in the Front Seat) . . . . . . . . . . . . . . . . 72
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.

GMC Terrain/Terrain Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-16540740) - 2023 - CRC - 6/16/22
Seats and Restraints 39
Folding Seatback
The front passenger seatback folds flat.
{Warning
If you fold the seatback forward to carry
longer objects, such as skis, be sure any
such cargo is not near an airbag. In a
crash, an inflating airbag might force that
object toward a person. This could cause
severe injury or even death. Secure
objects away from the area in which an
airbag would inflate. For more
information, seeWhere Are the Airbags?
0 50 and
Vehicle Load Limits 0196.
{Warning
Things you put on this seatback can
strike and injure people in a sudden stop
or turn, or in a crash. Remove or secure
all items before driving.
To fold the seatback: 1. Lower the head restraint all the way. See Head Restraints 031. 2. Move the seat as far back as possible.
See Seat Adjustment 032.
3. Lift the lever fully and fold the seatback
forward.
If necessary, move the seat belt out of
the way to access the lever.
4. Continue lowering the seatback until it is completely folded and locks in place.
To raise the seatback: 1. Lift the lever fully to unlock the seatback. Then, raise the seatback and
push it rearward until it re-engages.
2. Push and pull on the seatback to make sure it is locked in place.
{Warning
If either seatback is not locked, it could
move forward in a sudden stop or crash.
That could cause injury to the person
sitting there. Always push and pull on
the seatbacks to be sure they are locked.
Rear Seats
Rear Seat Reminder
If equipped, the message REAR SEAT
REMINDER LOOK IN REAR SEAT displays
under certain conditions indicating there
may be an item or passenger in the rear
seat. Check before exiting the vehicle.
This feature will activate when a second row
door is opened while the vehicle is on or up
to 10 minutes before the vehicle is turned
on. There will be an alert when the vehicle
is turned off. The alert does not directly
detect objects in the rear seat; instead,
under certain conditions, it detects when a
rear door is opened and closed, indicating
that there may be something in the
rear seat.