Chevrolet 1999 Silverado 1500 Pickup Owner's Manual page 107

CAUTION: (Continued)
-
With four wheel drive if your transfer case is in
NEUTRAL (N), your vehicle will be free to roll,
even if your shift lever is in PARK (P). So, be
sure the transfer case is in a drive gear
NEUTRAL (N). If you're pulling a trailer, see
"Towing a Trailer" in
the Index.
1. Hold the brake pedal down with your right foot and
set the parking brake.
2. Move the shift lever into PARK (P) position like this:
--
not in
D
Pull the shift lever toward you.
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