2005 GMC ENVOY XUV ECU

Q:Because I have a disability, I have to get my
vehicle modied. How can I nd out whether
this will affect my airbag system?
A:Changing or moving any parts of the front seats,
safety belts, the airbag sensing and diagnostic
module (located under the driver’s seat), or
the inside rearview mirror can affect the operation
of the airbag system. If you have questions,
call Customer Assistance. The phone numbers
and addresses for Customer Assistance are
in Step Two of the Customer Satisfaction Procedure
in this manual. SeeCustomer Satisfaction
Procedure on page 7-2.
Restraint System Check
Checking Your Restraint Systems
Now and then, make sure the safety belt reminder light
and all your belts, buckles, latch plates, retractors
and anchorages are working properly. Look for any other
loose or damaged safety belt system parts. If you see
anything that might keep a safety belt system from doing
its job, have it repaired.
Torn or frayed safety belts may not protect you in a
crash. They can rip apart under impact forces. If a belt
is torn or frayed, get a new one right away.
Also look for any opened or broken airbag covers, and
have them repaired or replaced. (The airbag system
does not need regular maintenance.)
1-61

Keys...............................................................2-3
Remote Keyless Entry System.........................2-5
Remote Keyless Entry System Operation...........2-6
Doors and Locks.............................................2-8
Door Locks....................................................2-8
Power Door Locks..........................................2-9
Delayed Locking.............................................2-9
Programmable Automatic Door Locks..............2-10
Rear Door Security Locks..............................2-12
Lockout Protection........................................2-12
Midgate.......................................................2-13
Tailgate.......................................................2-14
Power Roof.................................................2-18
Windows........................................................2-20
Power Windows............................................2-21
Sun Visors...................................................2-22
Theft-Deterrent Systems..................................2-22
Content Theft-Deterrent.................................2-22
Passlock
®....................................................2-24
Starting and Operating Your Vehicle................2-24
New Vehicle Break-In....................................2-24
Ignition Positions..........................................2-25Retained Accessory Power (RAP)...................2-25
Starting Your Engine.....................................2-26
Adjustable Throttle and Brake Pedal................2-27
Engine Coolant Heater..................................2-27
Displacement on Demand (DoD).....................2-28
Automatic Transmission Operation...................2-29
Four-Wheel Drive..........................................2-32
Parking Brake..............................................2-36
Shifting Into Park (P).....................................2-37
Shifting Out of Park (P).................................2-39
Parking Over Things That Burn.......................2-39
Engine Exhaust............................................2-40
Running Your Engine While You Are Parked.......2-40
Mirrors...........................................................2-42
Manual Rearview Mirror.................................2-42
Manual Rearview Mirror with OnStar
®..............2-42
Manual Rearview Mirror with Compass............2-42
Manual Rearview Mirror with OnStar
®and
Compass.................................................2-44
Manual Rearview Mirror with Compass and
Temperature.............................................2-46
Manual Rearview Mirror with OnStar
®,
Compass, and Temperature Display.............2-48
Section 2 Features and Controls
2-1

Rear Door Security Locks
Your vehicle may have this feature. You can lock the
rear doors so they can’t be opened from the inside by
passengers. To use one of these locks do the following:
1. Open one of the rear doors. You will nd a security
lock lever located on the inside edge of each
rear door.
2. Move the lever down
to engage the safety
lock. Move the lever
up to disengage
the safety lock.
3. Close the door.The rear doors of your vehicle cannot be opened from
the inside while this feature is in use. If you want to open
the rear door while the security lock is on, unlock the
door and open the door from the outside.
Lockout Protection
This feature stops the power door locks from locking
when the key is in the ignition and a door is open
to protect you from locking your key in the vehicle.
If the power lock switch is pressed when a door is open
and the key is in the ignition, all the doors will lock
and then the driver’s door will unlock.
2-12

Midgate
{CAUTION:
It can be dangerous to drive with the cargo
area covered and the tailgate and the midgate
open because carbon monoxide (CO) gas can
come into your vehicle. You cannot see or
smell CO. It can cause unconsciousness and
even death. If you must drive with the tailgate
and midgate open or if electrical wiring or
other cable connections must pass through
the seal between the body and the midgate:
Make sure all windows are shut.
Turn the fan on your heating or cooling
system to its highest speed with the
setting on outside air. That will force
outside air into your vehicle. SeeDual
Climate Control System on page 3-20.
If you have air outlets on or under the
instrument panel, open them all the way.
SeeEngine Exhaust on page 2-40.
Midgate
Your vehicle is equipped with a midgate and power
midgate glass. The midgate allows you to extend the
length of your vehicle’s cargo area.
Lowering the Midgate
The midgate can be lowered to allow the cargo area of
your vehicle to extend into the cab. The midgate
cannot be lowered when the glass is up.
To lower the midgate, do the following:
1. Fold and tumble the rear seats. The front seats might
have to be moved forward slightly to allow the rear
seats to fold and tumble. SeeRear Seat Operation
on page 1-6for more information.
2.
C(Midgate glass):Press this overhead console
button to lower the midgate glass with the key in the
ignition. The midgate can be lowered without the key
in the ignition if the midgate glass is already down.
{CAUTION:
When the midgate is raised or lowered,
unsecured safety belts can be damaged and
may not restrain you in a crash. To help avoid
personal injury, always secure belts in the
retainers before operating the midgate.
2-13

3. Clip the second row safety belts into the retainers.
They are mounted on the pillars below where the
safety belt passes through the trim panel. This
prevents the safety belt from being tangled in the
midgate when opening or closing the midgate.
4. Press the midgate release button located on the
driver’s side of the midgate while pulling the
release handle.
5. Lower the midgate and secure it in the down
position by engaging the midgate to the oor
support. The latch for the oor support is found on
the driver’s side of the vehicle.
Raising the Midgate
To return the midgate to its normal position, release the
midgate by pulling up on the lever found on the
driver’s side midgate support. Reverse the steps for
lowering the midgate listed previously. The midgate
must be fully latched on both sides before the midgate
glass can be raised.
Tailgate
Your vehicle is equipped with a tailgate which can be
swung out or opened at. It can be locked and unlocked
with the driver or passenger door power lock button
or the remote keyless entry transmitter. The tailgate has
power rear glass. The glass must be fully lowered to
open the tailgate to its at position.
The power roof and tailgate must both be fully closed to
raise the rear glass. If the roof or tailgate are not fully
closed, the words CLOSE THE ROOF or CLOSE
THE TAILGATE will appear on the DIC when you try
to raise the rear glass.
If the tailgate drop/swing, power roof, rear wiper and
rear window defogger functions are inoperative, or
SEE MANUAL– TAILGATE is displayed on the Driver
Information Center, the tailgate window position needs to
be reset. To reset the window position, activate the
tailgate window up switch and continue to hold it
for two seconds after the window is fully closed.
Then activate the tailgate window down switch and
continue to hold it for two seconds after the window is
fully open. If this process does not restore function,
see your dealer for service.
2-14

Opening the Tailgate
To open the tailgate, the vehicle must be in PARK (P)
and the doors must be unlocked. To open the tailgate to
a at position, the tailgate glass must rst be fully
lowered. Once the tailgate glass has been fully lowered,
open the tailgate by grasping its handle near the
middle and pulling the gate toward you.
To close the tailgate, use the integrated pocket at the
top of the tailgate. Firmly push the tailgate upward
until it latches. Do not grab the wiper arm/blade to close
the tailgate.
Notice:Closing the tailgate using the wiper
arm/blade may damage the vehicle. Close the
tailgate using only the pocket.
To swing the tailgate out, grasp the tailgate by its handle
near the driver’s side. If the tailgate glass is fully
closed, it will rst drop slightly to clear the upper roof
seal. The tailgate may then be swung out. If you release
the handle before the tailgate opens, the glass will
return to the fully closed position.
To close the tailgate, rmly push it toward the vehicle
until it latches. If the tailgate glass was fully closed when
you opened the tailgate, it will return to a fully closed
position when you close the tailgate.The tailgate is equipped with a prop rod to aid in
supporting heavy loads and to support four foot by
eight foot building material when placed in the
secondary position. In the secondary position, the
tailgate is raised approximately six degrees. With the
tailgate in the at position, remove the prop rod from the
retaining clip on the driver’s side. Rotate the rod forward
and engage the end of the slotted stud on the side of
the vehicle opening. Push down to lock the rod in place.
Two slotted studs on the vehicle provide two positions
for the tailgate. The prop rod must be in the stowed
position and secured in the retaining clip before closing
the tailgate.Tailgate Prop Rod
2-16

Sun Visors
To block out glare, you can pull the visor down. You can
also slide the visor along the rod from side-to-side to
cover the driver or passenger front window.
Visor Vanity Mirror
Pull the sun visor down to expose the vanity mirror.
Lighted Visor Vanity Mirror
Your vehicle may have this feature. Pull the sun visor
down and lift the mirror cover to turn on the lamps.
The lamps will turn off when the cover is closed.
Theft-Deterrent Systems
Vehicle theft is big business, especially in some cities.
Although your vehicle has a number of theft-deterrent
features, we know that nothing we put on it can make it
impossible to steal.
Content Theft-Deterrent
Your vehicle may be
equipped with a content
theft-deterrent alarm
system. If so, this security
light will appear on the
instrument panel cluster.
Here’s how to operate the system:
1. Open the door.
2. Lock the door with the power door lock switch or
the remote keyless entry transmitter. The security
light should come on and stay on.
3. Close all doors. The security light should turn off
after approximately 30 seconds. The alarm is not
armed until the security light turns off.
2-22

If a locked door is opened without the key or the remote
keyless entry transmitter, the alarm will go off. The
headlamps and parking lamps will ash for two minutes,
and the horn will sound for 30 seconds, then will turn
off to save the battery power.
Remember, the theft-deterrent system won’t activate
if you lock the doors with a key or use the manual door
lock. It activates only if you use a power door lock
switch with the door open, or with the remote keyless
entry transmitter. You should also remember that
you can start your vehicle with the correct ignition key
if the alarm has been set off.
Here’s how to avoid setting off the alarm by accident:
If you don’t want to activate the theft-deterrent
system, the vehicle should be locked with the door
keyafterthe doors are closed.
Always unlock a door with a key, or use the remote
keyless entry transmitter. Unlocking a door any
other way will set off the alarm.
If you set off the alarm by accident, unlock any door
with the key. You can also turn off the alarm by
pressing unlock on the remote keyless entry transmitter.
The alarm won’t stop if you try to unlock a door any
other way.
Testing the Alarm
The alarm can be tested by following these steps:
1. From inside the vehicle, lower the driver’s window
and open the driver’s door.
2. Activate the system by locking the doors with the
power door lock switch while the door is open, or
with the remote keyless entry transmitter.
3. Get out of the vehicle, close the door and wait for
the security light to go out.
4. Then reach in through the window, unlock the door
with the manual door lock and open the door.
This should set off the alarm.
When the alarm is set the power door unlock switch is
not operational.
If the alarm does not sound when it should but the
headlamps ash, check to see if the horn works.
The horn fuse may be blown. To replace the fuse,
seeFuses and Circuit Breakers on page 5-97.
If the alarm does not sound or the headlamps do not
ash, the vehicle should be serviced by your dealer.
2-23