2006 GMC ENVOY four wheel drive

Index ................................................................ 1
2006 GMC Envoy, Envoy XL, Envoy Denali,
and Envoy XL Denali Owner Manual
M
Seats and Restraint Systems ........................... 1-1
Front Seats ............................................... 1-2
Rear Seats ............................................... 1-9
Safety Belts ............................................. 1-14
Child Restraints ....................................... 1-32
Airbag System ......................................... 1-58
Restraint System Check ............................1-73
Features and Controls ..................................... 2-1
Keys ........................................................ 2-3
Doors and Locks ....................................... 2-8
Windows ................................................. 2-14
Theft-Deterrent Systems ............................2-17
Starting and Operating Your Vehicle ...........2-19
Mirrors .................................................... 2-36
OnStar
®System ...................................... 2-49
Universal Home Remote System ................2-51
Storage Areas ......................................... 2-56
Sunroof .................................................. 2-62
Vehicle Personalization .............................2-62
Instrument Panel ............................................. 3-1
Instrument Panel Overview
.......................... 3-4
Climate Controls ...................................... 3-20
Warning Lights, Gages, and Indicators ........3-31 Driver Information Center (DIC)
..................3-50
Audio System(s) ....................................... 3-66
Driving Your Vehicle ....................................... 4-1
Your Driving, the Road, and Your Vehicle
..... 4-2
Towing ................................................... 4-50
Service and Appearance Care .......................... 5-1
Service ..................................................... 5-3
Fuel ......................................................... 5-5
Checking Things Under the Hood ...............5-10
Rear Axle ............................................... 5-47
Four-Wheel Drive ..................................... 5-48
Front Axle ............................................... 5-49
Bulb Replacement .................................... 5-50
Windshield Wiper Blade Replacement .........5-53
Tires ...................................................... 5-55
Appearance Care ..................................... 5-92
Vehicle Identication ...............................5-101
Electrical System .................................... 5-102
Capacities and Specications ...................5-119
Maintenance Schedule ..................................... 6-1
Maintenance Schedule
................................ 6-2
Customer Assistance and Information .............. 7-1
Customer Assistance and Information ........... 7-2
Reporting Safety Defects ...........................7-14

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
Liftgate/Liftglass............................................2-13
Windows........................................................2-14
Power Windows............................................2-15
Power Rear Quarter Windows........................2-16
Sun Visors...................................................2-16
Theft-Deterrent Systems..................................2-17
Content Theft-Deterrent.................................2-17
Passlock
®....................................................2-18
Starting and Operating Your Vehicle................2-19
New Vehicle Break-In....................................2-19
Ignition Positions..........................................2-19
Retained Accessory Power (RAP)...................2-20
Starting the Engine.......................................2-20
Adjustable Throttle and Brake Pedal................2-22
Engine Coolant Heater..................................2-22
Displacement on Demand™ (DoD™)...............2-23Automatic Transmission Operation...................2-24
Four-Wheel Drive..........................................2-27
Parking Brake..............................................2-31
Shifting Into Park (P).....................................2-32
Shifting Out of Park (P).................................2-33
Parking Over Things That Burn.......................2-34
Engine Exhaust............................................2-34
Running the Engine While Parked...................2-35
Mirrors...........................................................2-36
Manual Rearview Mirror.................................2-36
Manual Rearview Mirror with OnStar
®..............2-36
Manual Rearview Mirror with OnStar®,
Compass, and Temperature Display.............2-37
Automatic Dimming Rearview Mirror
with OnStar
®and Compass........................2-39
Automatic Dimming Rearview Mirror
with OnStar
®, Compass and
Temperature Display..................................2-40
Automatic Dimming Rearview Mirror
with Compass...........................................2-43
Automatic Dimming Rearview Mirror with
Compass and Temperature Display..............2-44
Outside Manual Mirrors..................................2-47
Outside Power Mirrors...................................2-47
Outside Curb View Assist Mirror.....................2-48
Outside Convex Mirror...................................2-48
Outside Heated Mirrors..................................2-48
Section 2 Features and Controls
2-1

{CAUTION:
If you have four-wheel drive, your vehicle will
be free to roll — even if your shift lever is in
PARK (P) — if your transfer case is in
NEUTRAL. So, be sure the transfer case is in a
drive gear — not in NEUTRAL. SeeFour-Wheel
Drive on page 2-27. SeeShifting Into Park (P)
on page 2-32.
Ensure the shift lever is fully in PARK (P) before starting
the engine. Your vehicle has an automatic transmission
shift lock control system. You have to fully apply the
regular brakes before you can shift from PARK (P) when
the ignition key is in RUN. If you cannot shift out of
PARK (P), ease pressure on the shift lever, press the
button on the shift lever and push the shift lever all
the way into PARK (P) as you maintain brake
application. Move the shift lever into the gear you wish.
SeeShifting Out of Park (P) on page 2-33.REVERSE (R):Use this gear to back up.
Notice:Shifting to REVERSE (R) while your vehicle
is moving forward could damage the transmission.
The repairs would not be covered by your warranty.
Shift to REVERSE (R) only after your vehicle is
stopped.
To rock your vehicle back and forth to get out of snow,
ice, or sand without damaging your transmission,
seeIf Your Vehicle is Stuck in Sand, Mud, Ice, or Snow
on page 4-44.
NEUTRAL (N):In this position, the engine does not
connect with the wheels. To restart when you are
already moving, use NEUTRAL (N) only.
{CAUTION:
Shifting into a drive gear while your engine is
running at high speed is dangerous. Unless
your foot is rmly on the brake pedal, your
vehicle could move very rapidly. You could
lose control and hit people or objects. Do not
shift into a drive gear while your engine is
running at high speed.
2-25

Four-Wheel Drive
If your vehicle has four-wheel drive, the engine’s driving
power can be sent to all four wheels for extra traction.
To get the most satisfaction out of four-wheel drive, you
must be familiar with its operation. Read the part that
follows before using four-wheel drive. You should
use Two-Wheel High for most normal driving conditions.
Notice:Driving on clean, dry pavement in
Four-Wheel-Drive High or Four-Wheel-Drive Low for
an extended period of time may cause premature
wear on your vehicle’s powertrain. Do not drive on
clean, dry pavement in Four-Wheel-Drive High or
Four-Wheel-Drive Low for extended periods of time.
Automatic Transfer Case
Your vehicle will have one of the following transfer
case knobs.
If your vehicle has four-wheel drive, the transfer case
knob is located to the right of the steering wheel on the
instrument panel. Use this knob to shift into and out
of four-wheel drive.
2-27

2HI, 2m(Two-Wheel High):This setting is for driving
in most street and highway situations. Your front axle
is not engaged in two-wheel drive. It also provides
the best fuel economy.
A4WD, AUTO (Automatic Four-Wheel Drive):This
setting is ideal for use when road conditions are
variable. When driving your vehicle in automatic
four-wheel drive, the front axle is engaged, but the
vehicle’s power is sent to the rear wheels. When the
vehicle senses a loss of traction, the system will
automatically engage four-wheel drive. Driving in this
mode results in slightly lower fuel economy than
Two-Wheel High.
4HI, 4
m(Four-Wheel High):This setting should be
used when you need extra traction, such as on snowy or
icy roads or in most off-road situations. This setting
also engages your front axle to help drive your vehicle.
4LO, 4
n(Four-Wheel Low):This setting also
engages your front axle and delivers extra torque. It
sends maximum power to all four wheels. You might
choose this setting if you are driving off-road in deep
sand, deep mud, and climbing or descending steep hills.
{CAUTION:
Shifting the transfer case to NEUTRAL can
cause your vehicle to roll even if the
transmission is in PARK (P). You or someone
else could be seriously injured. Be sure to set
the parking brake before placing the transfer
case in NEUTRAL. SeeParking Brake on
page 2-31.
NEUTRAL:Shift the vehicle’s transfer case to
NEUTRAL only when towing your vehicle. See
Recreational Vehicle Towing on page 4-50for more
information.
An indicator light in the knob will show you which
position the transfer case is in. The indicator lights will
come on briey when you turn on the ignition and
one will stay on. If the lights do not come on, you should
take your vehicle to your dealer for service. An
indicator light will ash while shifting the transfer case. It
will stay on when the shift is complete. If for some
reason the transfer case cannot make a requested shift,
it will return to the last chosen setting.
2-28

If the service Four-Wheel Drive Warning Light on the
instrument panel cluster stays on, you should take your
vehicle to your dealer for service. SeeService
Four-Wheel Drive Warning Light on page 3-48for
further information.
Shifting Into Four-Wheel High or Automatic
Four-Wheel Drive
Turn the knob to Four-Wheel High or Automatic
Four-Wheel Drive. This can be done at any speed
unless you are shifting out of Four-Wheel Low. The
indicator light will ash while shifting. It will remain on
when the shift is complete.
Shifting Into Two-Wheel High
Turn the knob to Two-Wheel High. This can be done at
any speed unless you are shifting out of Four-Wheel Low.
Shifting Into Four-Wheel Low
To shift to Four-Wheel Low, the vehicle’s engine must
be running and the vehicle must be stopped or
moving less than 2 mph (3.2 km/h) with the transmission
in NEUTRAL (N). The preferred method for shifting
into Four-Wheel Low is to have your vehicle moving 1 or
2 mph (1.6 to 3.2 km/h). Turn the knob to Four-Wheel
Low. You must wait for the Four-Wheel Low indicator
light to stop ashing and stay on before shifting
the transmission into gear.If you turn the knob to Four-Wheel Low when your
vehicle is in gear and/or moving, the Four-Wheel Low
indicator light will ash for 30 seconds and not complete
the shift unless your vehicle is moving less than
2 mph (3.2 km/h) and the transmission is in
NEUTRAL (N). After 30 seconds, the transfer case will
return to the setting last chosen.
Shifting Out of Four-Wheel Low
To shift from Four-Wheel Low to Four-Wheel High, Auto
Four-Wheel Drive, or Two-Wheel High, your vehicle
must be stopped or moving less than 2 mph (3.2 km/h)
with the transmission in NEUTRAL (N) and the
engine running. The preferred method for shifting out of
Four-Wheel Low is to have your vehicle moving
1 or 2 mph (1.6 to 3.2 km/h). Turn the knob to
Four-Wheel High, Auto Four-Wheel Drive, or Two-Wheel
High. You must wait for the Four-Wheel High, Auto
Four-Wheel Drive, or Two-Wheel High indicator light to
stop ashing and stay off before shifting your
transmission into gear.
If the knob is turned to Four Wheel-High, Auto
Four-Wheel Drive, or Two-Wheel High when your
vehicle is in gear and/or moving, the Four-Wheel High,
Auto Four-Wheel Drive, or Two-Wheel High indicator
light will ash for 30 seconds. It will not complete
the shift unless your vehicle is moving less than 2 mph
(3.2 km/h) with the transmission in NEUTRAL (N).
2-29

Shifting into NEUTRAL
Before shifting the transfer case to NEUTRAL, rst
make sure the vehicle is parked so that it will not roll.
1. Set the parking brake.
2. Start the vehicle.
3. Put the transmission in NEUTRAL (N).
4. Shift the transfer case to Two-Wheel High.
5. Turn the transfer case knob all of the way past
Four-Wheel Low and hold it there for a minimum
of 10 seconds. The neutral indicator light will
come on.
6. With the engine running, shift the transmission to
REVERSE (R) for one second, then shift the
transmission to DRIVE (D) for one second, to
ensure that the transfer case is in NEUTRAL.
7. Turn the engine off, by turning the key to
ACCESSORY.
8. Place the transmission shift lever in PARK (P).
9. Turn the ignition to LOCK.
Shifting Out of NEUTRAL
To shift the transfer case out of NEUTRAL, do the
following:
1. Set the parking brake and apply the regular
brake pedal.
2. Turn the ignition to RUN with the engine off.
3. Put the transmission in NEUTRAL (N).
4. Turn the transfer case knob to the desired position
(Two-Wheel High, Four-Wheel High, or Auto
Four-Wheel Drive).
5. After the transfer case has shifted out of NEUTRAL,
the indicator light will go out.
6. Release the parking brake.
7. Start the engine and shift the transmission to the
desired position.
2-30

Shifting Into Park (P)
{CAUTION:
It can be dangerous to get out of your vehicle if
the shift lever is not fully in PARK (P) with the
parking brake rmly set. Your vehicle can roll. If
you have left the engine running, the vehicle
can move suddenly. You or others could be
injured. To be sure your vehicle will not move,
even when you are on fairly level ground, use
the steps that follow. With four-wheel drive,
your vehicle will be free to roll — even if your
shift lever is in PARK (P) — if your transfer case
is in NEUTRAL. So, be sure the transfer case is
in a drive gear — not in NEUTRAL. See
Four-Wheel Drive on page 2-27. Always put the
shift lever fully in PARK (P) with the parking
brake rmly set. If you are pulling a trailer, see
Towing a Trailer on page 4-56.To shift into PARK (P), do the following:
1. Hold the brake pedal down with your foot and set
the parking brake.
2. Move the shift lever into PARK (P) by pressing the
button on the side of the shift lever and pushing the
lever all the way toward the front of the vehicle.
3. Turn the ignition key to LOCK.
4. Remove the key and take it with you. You know
your vehicle is in PARK (P) if the key can be
removed from the ignition.
2-32