GMC 1996 Sierra Owner's Manual page 81

NEUTRAL (N): Use this position when you start or
idle your engine.
REVERSE
(R):
To back up, first press down the
clutch pedal. Wait about five seconds for the internal
parts to stop spinning and then, shift into REVERSE (R).
Let up on the clutch pedal slowly while pressing
the accelerator pedal.
.
NOTICE:
Shift to REVERSE (R)
only after your vehicle is
stopped. Shifting to REVERSE
(R)
while your
vehicle is moving could damage your transmission.
Also, use REVERSE (R), along with the parking brake,
when turning off your engine and parking your vehicle.
Shift Speeds
A
CAUTION:
If you skip more than one gear when you
downshift, you could lose control of your
vehicle. And you could injure yourself or
others. Don't shift down more than one gear
when you downshift.
NOTICE:
If you skip more than one gear when
you
downshift, or if you race the engine when you
downshift, you can damage the engine, clutch
o r transmission.
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