GMC 2004 Envoy, Owner'S Manual, Page: 101 / 466

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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. Do not leave your vehicle when the engine
is running unless you have to. 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, always
set your parking brake and move the shift
lever to PARK (P).
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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. See Four-Wheel
Drive on page 2-26.
Follow the proper steps to be sure your vehicle will
not move. See Shifting Into Park (P) on page 2-31.
If you are pulling a trailer, see Towing a Trailer
on page 4-55.
2-35