2017 GMC ACADIA LIMITED ECU

GMC Acadia Limited Owner Manual (GMNA-Localizing-U.S.-10283134) -
2017 - crc - 3/30/16
20 In Brief
To use the outlets, remove the
cover.
SeePower Outlets 0101.
Universal Remote System
If equipped, the Universal Home
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 0139.
Sunroof
On vehicles with a sunroof, the
sunroof only operates when the
ignition is in ON/RUN or ACC/
ACCESSORY, or when Retained Accessory Power (RAP) is active.
See
Retained Accessory Power
(RAP) 0175.
If equipped, there may be a rear
sunroof over the second row seats.
The rear sunroof does not open.
Vent : Press and hold the front of
the switch to vent the sunroof. Press
and hold the rear of the switch to
close the sunroof.
Express-open/Express-close :
Press and release the rear of the
switch to express-open the sunroof.
Press and release the front of the
switch to express-close the sunroof.
Manual Sunshade
The sunshades must be opened
and closed manually. To open the
sunshade, press the button on the
sunshade handle to release it and
guide it back. To close the
sunshade, pull the sunshade
forward until it latches.
The sunroof has an automatic
reversal system.
See Sunroof 041.

GMC Acadia Limited Owner Manual (GMNA-Localizing-U.S.-10283134) -
2017 - crc - 3/30/16
Keys, Doors, and Windows 23
Keys, Doors, and
Windows
Keys and Locks
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Remote Keyless Entry (RKE)System . . . . . . . . . . . . . . . . . . . . . . . 25
Remote Keyless Entry (RKE) System Operation . . . . . . . . . . . . 25
Remote Vehicle Start . . . . . . . . . . 27
Door Locks . . . . . . . . . . . . . . . . . . . . 28
Power Door Locks . . . . . . . . . . . . . 29
Delayed Locking . . . . . . . . . . . . . . . 29
Automatic Door Locks . . . . . . . . . 30
Lockout Protection . . . . . . . . . . . . . 30
Safety Locks . . . . . . . . . . . . . . . . . . . 30
Doors
Liftgate . . . . . . . . . . . . . . . . . . . . . . . . 31
Vehicle Security
Vehicle Security . . . . . . . . . . . . . . . . 34
Vehicle Alarm System . . . . . . . . . 34
Immobilizer . . . . . . . . . . . . . . . . . . . . 35
Immobilizer Operation . . . . . . . . . 35
Exterior Mirrors
Convex Mirrors . . . . . . . . . . . . . . . . 36
Power Mirrors . . . . . . . . . . . . . . . . . . 37 Folding Mirrors . . . . . . . . . . . . . . . . . 37
Heated Mirrors . . . . . . . . . . . . . . . . . 37
Automatic Dimming Mirror . . . . . 37
Park Tilt Mirrors . . . . . . . . . . . . . . . . 38
Interior Mirrors
Interior Rearview Mirrors . . . . . . . 38
Automatic Dimming Rearview
Mirror . . . . . . . . . . . . . . . . . . . . . . . . . 38
Windows
Windows . . . . . . . . . . . . . . . . . . . . . . . 38
Power Windows . . . . . . . . . . . . . . . 39
Sun Visors . . . . . . . . . . . . . . . . . . . . . 40
Roof
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . 41
Keys and Locks
Keys
{Warning
Leaving children in a vehicle with
the ignition key 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 keys in the
ignition, and children or others
could be caught in the path of a
closing window. Do not leave
children in a vehicle with the
ignition key.

GMC Acadia Limited Owner Manual (GMNA-Localizing-U.S.-10283134) -
2017 - crc - 3/30/16
30 Keys, Doors, and Windows
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).
To unlock the doors:
.Press
Kon the power door lock
switch.
. Shift the transmission into
P (Park).
Automatic door locking cannot be
disabled. Automatic door unlocking
can be programmed. See Vehicle
Personalization 0132.
Lockout Protection
When locking is requested with the
driver door open and the key in the
ignition, all the doors will lock and
then the driver door will unlock.
This can be manually overridden by
pressing and holding
Qon the
power door lock switch.
Safety Locks
Caution
Pulling the inside door handle
while the rear door safety locks
are engaged could damage your
vehicle. Do not pull the inside
door handle while the rear door
safety locks are engaged.
The vehicle has rear door safety
locks to prevent passengers from
opening the rear doors from the
inside.
Open the rear doors to access the
security locks on the inside edge of
each door.
To set the locks, insert a key into
the slot and turn it to the horizontal
position. The door can only be
opened from the outside with the
door unlocked. To return the door to
normal operation, turn the slot to the
vertical position.

GMC Acadia Limited Owner Manual (GMNA-Localizing-U.S.-10283134) -
2017 - crc - 3/30/16
34 Keys, Doors, and Windows
Vehicle Security
This vehicle has theft-deterrent
features; however, they do not make
the vehicle impossible to steal.
Vehicle Alarm System
On vehicles with an anti-theft alarm
system, to activate the system:
.Press
Qon the Remote Keyless
Entry (RKE) transmitter or the
power door lock switch when
any door is open.
The security light flashes.
When the door is closed, the
security light stops flashing and
stays on solid for approximately
30 seconds. The content
theft-deterrent alarm is not
armed until the security light
goes off. If the delayed locking feature is
active, the alarm is not activated
until all doors are closed and the
security light goes off.
. Press
Qwhen the driver door is
closed. The security light comes
on solid for approximately
30 seconds and then goes off.
The content theft-deterrent alarm
is not armed until the security
light goes off.
The theft-deterrent system will not
activate if the doors are locked with
the vehicle's key or the manual
door lock.
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.
The alarm will also be activated if a
passenger door, the liftgate, or the
hood is opened without first disarming the system. When the
alarm is activated, the turn signals
flash and the horn sounds for about
30 seconds. The alarm system will
then re-arm to monitor for the next
unauthorized event.
The vehicle can be started with the
correct ignition key if the alarm has
been set off.
To avoid setting off the alarm by
accident:
.
Lock the vehicle with the door
key after the doors are closed.
. Unlock the door with the RKE
transmitter. Unlocking a door any
other way sets off the alarm if
the system has been armed.
Press
Kor place the key in the
ignition and turn it to START to turn
off the alarm.
Testing the Alarm
To test the alarm:
1. From inside the vehicle, lower the driver side window, and
open the driver door.
2. Press
Q.

GMC Acadia Limited Owner Manual (GMNA-Localizing-U.S.-10283134) -
2017 - crc - 3/30/16
Keys, Doors, and Windows 35
3. Get out of the vehicle, closethe door, and wait for the
security light to go out.
4. Reach in through the window, unlock the door with the
manual door lock, and open
the door. This should set off the
alarm.
If the alarm does not sound when it
should, but the headlamps flash,
check to see if the horn works. The
horn fuse may be blown. To replace
the fuse, see Fuses and Circuit
Breakers 0233.
If the alarm does not sound or the
headlamps do not flash, see your
dealer for service.
Immobilizer
See Radio Frequency
Statement 0314.
Immobilizer Operation
This vehicle has PASS-Key®III+
(Personalized Automotive Security
System) theft-deterrent system.
PASS-Key III+ is a passive
theft-deterrent system. The system is automatically armed
when the key is removed from the
ignition.
The system is automatically
disarmed when the key is turned to
ON/RUN, ACC/ACCESSORY,
or START from the LOCK/OFF
position.
You do not have to manually arm or
disarm the system.
The security light comes on if there
is a problem with arming or
disarming the theft-deterrent
system.
When the PASS-Key III+ system
senses an incorrect key, the vehicle
does not start. Anyone using a
trial-and-error method to start the
vehicle will be discouraged because
of the high number of electrical key
codes.
If the engine does not start and the
security light on the instrument
panel comes on when trying to start
the vehicle, there may be a problem
with the theft-deterrent system. Turn
the ignition off and try again.
If the engine still does not start, and
the key appears to be undamaged,
try another ignition key and check
the fuses. See
Fuses and Circuit
Breakers 0233 for additional
information. If the engine still does
not start with the other key, the
vehicle needs service. If the vehicle
does start, the first key may be
faulty. See your dealer who can
service the PASS-Key III+ to have a
new key made. In an emergency,
contact Roadside Assistance. See
Roadside Assistance
Program 0308.
It is possible for the PASS-Key III+
decoder to learn the transponder
value of a new or replacement key.
Up to eight keys may be
programmed to the vehicle. The
following procedure is for
programming additional keys only.
If all currently programmed keys are
lost or do not operate, you must see
your dealer or a locksmith who can
service PASS-Key III+ to have keys
made and programmed to the
system.

GMC Acadia Limited Owner Manual (GMNA-Localizing-U.S.-10283134) -
2017 - crc - 3/30/16
36 Keys, Doors, and Windows
See your dealer or a locksmith who
can service PASS-Key III+ to get a
new key blank that is cut exactly as
the ignition key that operates the
system.
To program the new additional key:1. Verify that the new key has a
1stamped on it.
2. Insert the already programmed key in the ignition and start the
engine. If the engine does not
start, see your dealer for
service.
3. After the engine has started, turn the key to LOCK/OFF, and
remove the key.
4. Insert the key to be programmed and turn it to the
ON/RUN position within
five seconds of the original key
being turned to the LOCK/OFF
position.
The security light turns off once
the key has been programmed. 5. Repeat Steps 1–4 if additional
keys are to be programmed.
If the PASS-Key III+ key is lost or
damaged, see your dealer or a
locksmith to have a new key made.
The SERVICE THEFT
DETERRENT SYSTEM message
displays on the Driver Information
Center (DIC) when there is a
problem with the theft-deterrent
system. See Security Messages
0 129 for additional information.
Do not leave the key or device that
disarms or deactivates the
theft-deterrent system in the vehicle.
Exterior Mirrors
Convex Mirrors
{Warning
A convex mirror can make things,
like other vehicles, look farther
away than they really are. If you
cut too sharply into the right lane,
you could hit a vehicle on the
right. Check the inside mirror or
glance over your shoulder before
changing lanes.
The passenger side mirror is convex
shaped. A convex mirror's surface is
curved so more can be seen from
the driver seat.

GMC Acadia Limited Owner Manual (GMNA-Localizing-U.S.-10283134) -
2017 - crc - 3/30/16
Seats and Restraints 43
Seats and
Restraints
Head Restraints
Head Restraints . . . . . . . . . . . . . . . 44
Front Seats
Power Seat Adjustment . . . . . . . . 45
Lumbar Adjustment . . . . . . . . . . . . 45
Reclining Seatbacks . . . . . . . . . . . 46
Memory Seats . . . . . . . . . . . . . . . . . 47
Heated and Cooled FrontSeats . . . . . . . . . . . . . . . . . . . . . . . . . 48
Rear Seats
Rear Seats . . . . . . . . . . . . . . . . . . . . 49
Third Row Seats . . . . . . . . . . . . . . . 51
Safety Belts
Safety Belts . . . . . . . . . . . . . . . . . . . . 53
How to Wear Safety BeltsProperly . . . . . . . . . . . . . . . . . . . . . . 54
Lap-Shoulder Belt . . . . . . . . . . . . . 55
Safety Belt Use During Pregnancy . . . . . . . . . . . . . . . . . . . . 59
Safety Belt Extender . . . . . . . . . . . 60
Safety System Check . . . . . . . . . . 60
Safety Belt Care . . . . . . . . . . . . . . . 60 Replacing Safety Belt System
Parts after a Crash . . . . . . . . . . . 61
Airbag System
Airbag System . . . . . . . . . . . . . . . . . 61
Where Are the Airbags? . . . . . . . 63
When Should an AirbagInflate? . . . . . . . . . . . . . . . . . . . . . . . 65
What Makes an Airbag Inflate? . . . . . . . . . . . . . . . . . . . . . . . 66
How Does an Airbag Restrain? . . . . . . . . . . . . . . . . . . . . . 66
What Will You See after an Airbag Inflates? . . . . . . . . . . . . . . 66
Passenger Sensing System . . . 68
Servicing the Airbag-Equipped Vehicle . . . . . . . . . . . . . . . . . . . . . . . 72
Adding Equipment to the Airbag-Equipped Vehicle . . . . . 72
Airbag System Check . . . . . . . . . . 73
Replacing Airbag System Parts after a Crash . . . . . . . . . . . . . . . . . 73
Child Restraints
Older Children . . . . . . . . . . . . . . . . . 73
Infants and Young Children . . . . 75
Child Restraint Systems . . . . . . . 77
Where to Put the Restraint . . . . . 79
Lower Anchors and Tethers forChildren (LATCH System) . . . . 80 Replacing LATCH System Parts
After a Crash . . . . . . . . . . . . . . . . . 87
Securing Child Restraints (With the Safety Belt in the
Rear Seat) . . . . . . . . . . . . . . . . . . . 87
Securing Child Restraints (With the Safety Belt in the
Front Seat) . . . . . . . . . . . . . . . . . . . 89

GMC Acadia Limited Owner Manual (GMNA-Localizing-U.S.-10283134) -
2017 - crc - 3/30/16
52 Seats and Restraints
4. Stow the mini-latch in theholder in the headliner.
5. Pull up on the release lever onthe back of the seat.
6. Push the seatback forward to lay flat.
Returning the Seat to the
Seating Position
To return the seatback to the
seating position:
1. From the rear of the vehicle, raise the seatback to the
upright position using the pull
strap on the back of the third row seat, or lift the seatback
and push it into place from
inside the vehicle.
{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.
2. Push and pull on the seatback to make sure it is locked in
place.
{Warning
A safety belt that is improperly
routed, not properly attached,
or twisted will not provide the
protection needed in a crash. The
person wearing the belt could be
seriously injured. After raising the
rear seatback, always check to be
(Continued)
Warning (Continued)
sure that the safety belts are
properly routed and attached, and
are not twisted.
3. Reconnect the center safety belt mini-latch to the
mini-buckle. Do not let it twist.
4. Pull on the safety belt to be sure the mini-latch is secure.
Removing the Third Row Seats
To remove a third row seat:
1. Remove the cargo management system, if it is
installed. See Cargo
Management System 094.
2. Remove anything on or under the seat.
Caution
Folding a rear seat with the safety
belts still fastened may cause
damage to the seat or the safety
(Continued)