2004 GMC ENVOY ignition

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 remain illuminated 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.
If the service four-wheel drive 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 3-47for further information.
Shifting into 4HI or A4WD
Turn the knob to 4HI or A4WD. This can be done at any
speed unless you are shifting out of 4LO. The indicator
light will ash while shifting. It will remain illuminated
when the shift is complete.
Shifting into 2HI
Turn the knob to 2HI. This can be done at any speed
unless you are shifting out of 4LO.
Shifting into 4LO
To shift to 4LO, 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 into4LO is to have your vehicle moving 1 or 2 mph (1.6 to
3.2 km/h). Turn the knob to 4LO. You must wait for
the 4LO indicator light to stop ashing and remain
illuminated before shifting your transmission into gear.
If you turn the knob to 4LO when your vehicle is in gear
and/or moving, the 4LO 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 4LO
To shift from 4LO to 4HI, A4WD or 2HI 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 4LO is to have
your vehicle moving 1 or 2 mph (1.6 to 3.2 km/h). Turn
the knob to 4HI, A4WD or 2HI. You must wait for the 4HI,
A4WD or 2HI indicator light to stop ashing and remain
illuminated before shifting your transmission into gear.
If the knob is turned to 4HI, A4WD or 2HI when your
vehicle is in gear and/or moving, the 4HI, A4WD or 2HI
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).
2-28

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 2HI.
5. Turn the transfer case knob all of the way past 4LO
and hold it there for a minimum of 10 seconds. The
neutral indicator light will come on.
6. Shift the transmission to REVERSE (R) for one
second, then shift the transmission to DRIVE (D)
for one second.
7. Place the transmission shift lever in PARK (P).
8. Turn the ignition to LOCK.
9. Release the parking brake prior to towing.
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. Start the vehicle with the transmission in PARK (P).
3. Turn the transfer case knob to the desired shift
position (2HI, 4HI or A4WD).
4. Put the transmission in NEUTRAL (N).
5. Release the parking brake.
6. After the transfer case has shifted out of NEUTRAL,
the indicator light will go out. Shift the transmission
lever to the desired position.
A re-engagement sound is normal when shifting out of
NEUTRAL.
2-29

Parking Brake
To set the parking brake, hold the regular brake pedal
down with your foot and pull up on the parking brake
lever. If the ignition is on, the brake system warning light
will come on.
To release the parking brake, hold the regular brake
pedal down. Pull the parking brake lever up until you can
press in the button at the end of the lever. Hold the
button in as you move the parking brake lever all the
way down.Notice:Driving with the parking brake on can
overheat the brake system and cause premature
wear or damage to brake system parts. Verify that
the parking brake is fully released and the brake
warning light is off before driving.
If you are towing a trailer and you must park on a hill,
seeTowing a Trailer on page 4-55. That section
shows what to do rst to keep the trailer from moving.
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. SeeFour-Wheel Drive
on page 2-26. Always put the shift lever fully in
PARK (P) with the parking brake rmly set.
If you are pulling a trailer, seeTowing a Trailer
on page 4-55.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)
like this:
2.1. Press the button in on the side of the lever.
2.2. Push 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.
2-31

Shifting Out of Park (P)
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 is in RUN. SeeAutomatic Transmission
Operation on page 2-24.
Parking Over Things That Burn
{CAUTION:
Things that can burn could touch hot exhaust
parts under your vehicle and ignite. Do not
park over papers, leaves, dry grass or other
things that can burn.
2-33

Sunroof
Your vehicle may be equipped with a power sliding
sunroof. To open or close your sunroof, the ignition must
be on or Retained Accessory Power (RAP) must be
active.
Press and release the back of the button in the overhead
console to open the sunroof. Press the front of the
button to close the sunroof. Once the sunroof is closed,
press the forward side of the button to open the
sunroof to the vent position.
The sunroof is also equipped with a sunshade which
you can pull forward to block sun rays.
Vehicle Personalization
Memory Seat
Your vehicle may have this
feature. The controls are
located on the driver’s
door, and are used
to program and recall
memory settings for the
driver’s seating positions,
outside mirror positions
and adjustable pedals
(if equipped).
Adjust the driver’s seat, including the seatback recliner
and lumbar, both of the outside mirrors, and the
adjustable pedals to the desired position. Then press
and hold button 1 (for driver 1) for three seconds.
A double chime will sound to let you know that the
position has been stored.
2-52

A second mirror position, seating position and adjustable
pedal position can be programmed by repeating the
procedure with a second driver and pressing button 2 for
three seconds. Each time button 1 or 2 is pressed
and released while the vehicle is in PARK (P), a single
chime will sound, and the memory position will be
recalled.
If you use the unlock button on the remote keyless entry
transmitter to enter your vehicle, the preset driver’s
seat, mirror positions and adjustable pedal position will
be recalled if programmed to do so through the
Driver Information Center (DIC). The numbers on the
back of the transmitters, 1 or 2, correspond to the
numbers on the memory controls.
The seat positions, mirror positions and adjustable
pedal positions can also be recalled by placing the key
in the ignition if programmed to do so through the
Driver Information Center (DIC). SeeDIC Operation and
Displays on page 3-50.
To stop recall movement of the memory feature at any
time, press one of the power seat controls or memory
buttons.Two personalized exit positions can be set by rst
recalling the driver’s position by pressing 1 or 2, then
positioning the seat in the desired exit position for
that driver. Press and hold the button with the exit
symbol for three seconds. A double chime will sound to
let you know that the position has been stored. With
the vehicle in PARK (P), the exit position for that driver
can be recalled by pressing the exit button. The
mirrors, power lumbar, recline and adjustable pedal
positions will not be stored or recalled for the exit
positions. If no exit position is stored, the default is all
the way rearward.
Further programming for automatic seat and mirror
movement can be done through the Driver Information
Center (DIC). You may choose to either select or
not select the following:
Automatic seat, mirror movement and pedal
position when the vehicle is unlocked with the
remote keyless entry
automatic seat, mirror movement and pedal position
when a key is placed in the ignition
automatic seat movement to the exit position when
the vehicle is in PARK (P).
2-53

The main components of your instrument panel are the
following:
A. Exterior Lamp Controls. SeeExterior Lamps on
page 3-15.
B. Air Outlets. See “Outlet Adjustment” underDual
Climate Control System on page 3-20.
C. Turn Signal/Multifunction Lever. SeeTurn
Signal/Multifunction Lever on page 3-7.
D. OnStar and Audio Steering Wheel Controls. See
Audio Steering Wheel Controls on page 3-116.
E. Instrument Panel Cluster. SeeInstrument Panel
Cluster on page 3-33.
F. Audio Steering Wheel Controls. SeeAudio Steering
Wheel Controls on page 3-116.
G. Ignition Switch. SeeIgnition Positions on page 2-20.
H. Audio System. SeeAudio System(s) on page 3-63.
I. Climate Controls. SeeDual Climate Control
System on page 3-20.
J. Hood Release. SeeHood Release on page 5-10.K. Driver Information Center (DIC) Steering Wheel
Controls. SeeDriver Information Center (DIC)
on page 3-50.
L. Transfer Case Controls. See “Automatic Transfer
Case” underFour-Wheel Drive on page 2-26.
M. Shift Lever. SeeShifting Into Park (P) on page 2-31.
N. Lighter. SeeAshtrays and Cigarette Lighter on
page 3-20.
O. Accessory Power Outlets. SeeAccessory Power
Outlets on page 3-19.
P. Parking Brake. SeeParking Brake on page 2-30.
Q. Rear Window Washer/Wiper. See “Rear Window
Washer/Wiper” underTurn Signal/Multifunction Lever
on page 3-7.
R. Rear Window Defogger. See “Rear Window
Defogger” underDual Climate Control System on
page 3-20.
S. Glove Box. SeeGlove Box on page 2-45.
3-5