Leaving Your Vehicle With The Engine Running - GMC Envoy 2003 Owner's Manual

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.
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Leaving Your Vehicle With the Engine
Running
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CAUTION:
It can be dangerous to leave your vehicle
with the engine running. Your vehicle could
move suddenly if the shift lever is not fully in
PARK (P) with the parking brake firmly set.
If you have four-wheel drive, your vehicle
will be free to roll – even if your lever is in
PARK (P) – if your transfer case is in
NEUTRAL. So be sure the transfer case is in a
drive gear – not NEUTRAL. See "Four-Wheel
Drive (Automatic Transfer Case)" in the Index.
And, if you leave the vehicle with the engine
running, it could overheat and even catch fire.
You or others could be injured. Don't leave
your vehicle with the engine running unless
you have to.