GMC 2001 Envoy - Manual (Page 107)

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Shifting Into PARK (P)
(Automatic Transmission Only)
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.
Column Shift Lever
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 Pull the lever toward you.