GMC 2001 Yukon XL Owner's Manual page 99

CAUTION: (Continued)
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If you have four wheel drive, your vehicle will
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be free to roll even if your shift lever is in
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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
-
high (4H) or four wheel low (4L)
NEUTRAL. See "Shifting Into PARK (P)" in the
Index. If you're pulling a trailer, see "Towing a
Trailer" in the Index.
REVERSE (R): Use this gear to back up.
NOTICE:
Shifting to REVERSE (R) while your vehicle is
moving forward could damage your
transmission. Shift to REVERSE (R) only after
your vehicle is stopped.
To rock your vehicle back and forth to get out of snow,
ice or sand without damaging your transmission, see
"Stuck: In Sand, Mud, Ice or Snow" in the Index.
NEUTRAL (N): In this position, your engine
doesn't connect with the wheels. To restart when you're
already moving, use NEUTRAL (N) only. Also, use
NEUTRAL (N) when your two
-
wheel
being towed.
--
not in
CAUTION:
Shifting out of PARK (P) or NEUTRAL (N) while
your engine is "racing" (running at high speed) is
dangerous. Unless your foot is firmly on the
brake pedal, your vehicle could move very
rapidly. You could lose control and hit people or
objects. Don't shift out of PARK (P) or
NEUTRAL (N) while your engine is racing.
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wheel drive vehicle is
2-21