Automatic Transmission Operation - GMC 2004 Yukon XL Owner's Manual

Automatic Transmission Operation

There are several different positions for your shift lever.
Your vehicle is equipped with an automatic transmission
and features an electronic shift position indicator
within the instrument panel cluster. This display must be
powered anytime the shift lever is capable of being
moved out of PARK (P).
PARK (P): This position locks your rear wheels. It's the
best position to use when you start your engine
because your vehicle can't move easily.
CAUTION:
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It is 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.
2-24
CAUTION: (Continued)
CAUTION: (Continued)
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).
See Shifting Into Park (P) on page 2-37. If you
are pulling a trailer, see Towing a Trailer on
page 4-63.
CAUTION:
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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,
two-wheel high (2H) or four-wheel high (4H) or
four-wheel low (4L) — not in NEUTRAL.
See Shifting Into Park (P) on page 2-37.