GMC 1996 Sierra Owner's Manual page 91

Parking Your Vehicle (Manual
Transmission Models Only)
Before you get out of your vehicle, put your manual
transmission in REVERSE (R), turn off the engine, and
firmly apply the parking brake.
If you have four-wheel drive, be sure your transfer case
is in a drive gear. Your vehicle could roll if it isn't.
If you are parking on a hill, or if you are pulling a
trailer, see "Towing a Trailer" in the Index.
Parking Over Things That Burn
f
A
CAUTION:
Things that can burn could touch hot exhaust
parts under your vehicle and ignite. Don't park
over papers, leaves, dry grass or other things that
can burn.
2-29