2019 GMC TERRAIN ECU

GMC Terrain/Terrain Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-12146071) - 2019 - crc - 7/27/18
In Brief 23
SeeAssistance Systems for Parking
or Backing 0243.
Automatic Parking
Assist (APA)
If equipped, the APA system helps
to search for and maneuver the
vehicle into parallel or perpendicular
parking spots using automatic
steering, DIC displays, and beeps.
When the vehicle speed is below
30 km/h (18 mph), press
Oto
enable the system.
See “Automatic Parking Assist
(APA)” underAssistance Systems
for Parking or Backing 0243.
Power Outlets
The vehicle has two 12-volt
accessory power outlets, which can
be used to plug in electrical
equipment, such as a cell phone or
MP3 player.
There are power outlets:
.
On the center stack below the
climate control system. .
In the rear cargo area.
To use the outlet, remove the cover.
See Power Outlets 0117.
Universal Remote System
If equipped, the Universal Remote
System allows for garage door
openers, security systems, and
home automation devices to be
programmed to work with these
buttons in the vehicle.
See Universal Remote System
0 157.
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.
See Ignition Positions 0195 and
Retained Accessory Power (RAP)
0 202.

GMC Terrain/Terrain Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-12146071) - 2019 - crc - 7/27/18
Keys, Doors, and Windows 29
Keys, Doors, and
Windows
Keys and Locks
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Remote Keyless Entry (RKE)System . . . . . . . . . . . . . . . . . . . . . . . 30
Remote Keyless Entry (RKE) System Operation . . . . . . . . . . . . 30
Remote Vehicle Start . . . . . . . . . . 36
Door Locks . . . . . . . . . . . . . . . . . . . . 38
Power Door Locks . . . . . . . . . . . . . 40
Delayed Locking . . . . . . . . . . . . . . . 40
Automatic Door Locks . . . . . . . . . 41
Lockout Protection . . . . . . . . . . . . . 41
Safety Locks . . . . . . . . . . . . . . . . . . . 41
Doors
Liftgate . . . . . . . . . . . . . . . . . . . . . . . . 42
Vehicle Security
Vehicle Security . . . . . . . . . . . . . . . . 48
Vehicle Alarm System . . . . . . . . . 48
Immobilizer . . . . . . . . . . . . . . . . . . . . 49
Immobilizer Operation . . . . . . . . . 50
Exterior Mirrors
Convex Mirrors . . . . . . . . . . . . . . . . 51
Power Mirrors . . . . . . . . . . . . . . . . . . 51
Folding Mirrors . . . . . . . . . . . . . . . . . 51
Heated Mirrors . . . . . . . . . . . . . . . . . 51
Automatic Dimming Mirror . . . . . 52
Reverse Tilt Mirrors . . . . . . . . . . . . 52
Interior Mirrors
Interior Rearview Mirrors . . . . . . . 52
Manual Rearview Mirror . . . . . . . . 52
Automatic Dimming Rearview Mirror . . . . . . . . . . . . . . . . . . . . . . . . . 52
Windows
Windows . . . . . . . . . . . . . . . . . . . . . . . 52
Power Windows . . . . . . . . . . . . . . . 53
Sun Visors . . . . . . . . . . . . . . . . . . . . . 54
Roof
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . 55
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-12146071) - 2019 - crc - 7/27/18
40 Keys, Doors, and Windows
3. Slide the cap forward andpress the forward 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 from being
forced open. To reset the lock, turn
it to the vertical position with the
correct key fully inserted. Remove
the key and insert it again. If this
does not reset the lock, turn the key
halfway around in the cylinder and
repeat the reset procedure.Power Door Locks
Q: Press to lock the doors.
K:Press to unlock the doors.
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.

GMC Terrain/Terrain Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-12146071) - 2019 - crc - 7/27/18
44 Keys, Doors, and Windows
Caution
To avoid damage to the liftgate or
liftgate glass, make sure the area
above and behind the liftgate is
clear before opening it.
If equipped with a power liftgate, the
switch is usually on the driver door.
The switch can also be on the
overhead console. 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.
. Press
btwice quickly on the
RKE transmitter until the liftgate
moves.
. Press
8on the driver door.
The driver door must either be
unlocked or locked without the
security armed.
. 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
RKE transmitter is within 1 m
(3 ft) of the touch pad.
.Presslon the bottom of the
liftgate next to the pull cup to
close.
Press any liftgate button, the touch
pad, or
bon the RKE transmitter
while the liftgate is moving to stop it.
Pressing any liftgate button or
pressing
btwice quickly on the
RKE transmitter 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.

GMC Terrain/Terrain Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-12146071) - 2019 - crc - 7/27/18
48 Keys, Doors, and Windows
Caution
Splashing water may cause the
liftgate to open. Keep the RKE
transmitter away from the rear
bumper detection area or turn the
liftgate mode to OFF when
cleaning or working near the rear
bumper to avoid accidental
opening.
. 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.

GMC Terrain/Terrain Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-12146071) - 2019 - crc - 7/27/18
Keys, Doors, and Windows 49
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
Kon 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:
. Press
Kon 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
0 405.

GMC Terrain/Terrain Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-12146071) - 2019 - crc - 7/27/18
50 Keys, Doors, and Windows
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 transmitter
leaves the vehicle.
The immobilization system is
disarmed when the ignition is turned
on or in ACC/ACCESSORY and a
valid Remote Keyless Entry (RKE)
transmitter is 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 RKE
transmitters matched to an
immobilizer control unit in your
vehicle. Only a correctly matched
RKE transmitter will start the
vehicle. If the transmitter 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 ignition will not change from
off to on or ACC/ACCESSORY, and
the RKE transmitter appears to be
undamaged, try another transmitter.
Or, you may try placing the
transmitter in the cupholder in the
center console.
If the ignition mode will not change
with the other transmitter or with the
transmitter in the cupholder, your
vehicle needs service. If the ignition
does change modes, the first
transmitter may be faulty. See your
dealer who can service the
theft-deterrent system and have a
new RKE transmitter programmed to
the vehicle.
It is possible for the immobilizer
system to learn new or replacement
RKE transmitters. Up to eight
transmitters can be programmed to
the vehicle. To program additional
transmitters, see
“Programming
Transmitters to the Vehicle” under
Remote Keyless Entry (RKE)
System Operation 030.
Do not leave the transmitter 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-12146071) - 2019 - crc - 7/27/18
Seats and Restraints 57
Seats and
Restraints
Head Restraints
Head Restraints . . . . . . . . . . . . . . . 58
Front Seats
Seat Adjustment . . . . . . . . . . . . . . . 60
Power Seat Adjustment . . . . . . . . 60
Lumbar Adjustment . . . . . . . . . . . . 61
Reclining Seatbacks . . . . . . . . . . . 61
Memory Seats . . . . . . . . . . . . . . . . . 62
Heated and Ventilated FrontSeats . . . . . . . . . . . . . . . . . . . . . . . . . 65
Folding Seatback . . . . . . . . . . . . . . 66
Rear Seats
Rear Seats . . . . . . . . . . . . . . . . . . . . 67
Heated Rear Seats . . . . . . . . . . . . 70
Seat Belts
Seat Belts . . . . . . . . . . . . . . . . . . . . . 71
How to Wear Seat Belts Properly . . . . . . . . . . . . . . . . . . . . . . 72
Lap-Shoulder Belt . . . . . . . . . . . . . 74
Seat Belt Use During Pregnancy . . . . . . . . . . . . . . . . . . . . 77
Seat Belt Extender . . . . . . . . . . . . . 77
Safety System Check . . . . . . . . . . 78 Seat Belt Care . . . . . . . . . . . . . . . . . 78
Replacing Seat Belt System
Parts after a Crash . . . . . . . . . . . 78
Airbag System
Airbag System . . . . . . . . . . . . . . . . . 79
Where Are the Airbags? . . . . . . . 81
When Should an AirbagInflate? . . . . . . . . . . . . . . . . . . . . . . . 82
What Makes an Airbag Inflate? . . . . . . . . . . . . . . . . . . . . . . . 83
How Does an Airbag Restrain? . . . . . . . . . . . . . . . . . . . . . 83
What Will You See after an Airbag Inflates? . . . . . . . . . . . . . . 84
Passenger Sensing System . . . 85
Servicing the Airbag-Equipped Vehicle . . . . . . . . . . . . . . . . . . . . . . . 89
Adding Equipment to the Airbag-Equipped Vehicle . . . . . 89
Airbag System Check . . . . . . . . . . 90
Replacing Airbag System Parts after a Crash . . . . . . . . . . . . . . . . . 91
Child Restraints
Older Children . . . . . . . . . . . . . . . . . 91
Infants and Young Children . . . . 93
Child Restraint Systems . . . . . . . 95
Where to Put the Restraint . . . . . 97
Lower Anchors and Tethers forChildren (LATCH System) . . . . 98 Replacing LATCH System
Parts After a Crash . . . . . . . . . 103
Securing Child Restraints (With the Seat Belt in the
Rear Seat) . . . . . . . . . . . . . . . . . . 104
Securing Child Restraints (With the Seat Belt in the
Front Seat) . . . . . . . . . . . . . . . . . . 106