GMC 2002 Envoy - Manual (Page 101)

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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 firmly 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 won’t move,
even when you’re 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 (Automatic Transfer Case)” in the Index.
Always put the shift lever fully in PARK (P) with
the parking brake firmly set. If you’re pulling a
trailer, see “Towing a Trailer” in the Index.
1. Hold the brake pedal down with your right foot and
set the parking brake.
2. Move the shift lever into
PARK (P) like this:
D Press the button in on
the front of the lever.
D 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. If you
can leave your vehicle with the key, your vehicle is
in PARK (P).