GMC 1996 Sierra Owner's Manual page 73

Starting Your Gasoline Engine
If you have a diesel engine, see "Starting Your Diesel
Engine" in the Diesel Engine Supplement.
Automatic
transmission
Move your shift lever to PARK (P) or NEUTRAL (N).
Your engine won't start in any other position
--
that's a
safety feature. To restart when you're already moving,
use NEUTRAL (N) only.
NOTICE:
Don't try to shift to
PARK (P)
if your vehicle is
moving. If you do, you could damage the
transmission. Shift to
PARK (P)
only when your
vehicle is stopped.
Manual transmission
The gear selector should be in NEUTRAL (N). Hold the
clutch pedal to the floor and start the engine.
Your
vehicle won't start if the clutch pedal is not all the way
down
--
that's a safety feature.
1.
Without pushing the accelerator pedal, turn your
ignition key to START. When the engine starts, let
go of the key. The idle speed will go down as your
engine gets warm.
NOTICE:
Holding your key in START for longer than
15 seconds at a time will cause your battery to be
drained much sooner. And the excessive heat can
damage your starter motor.
2. If
it doesn't start right away, hold your key in
START. If
it
doesn't start in 10 seconds, push the
accelerator pedal a l l the way down for five more
seconds, or until
it
starts.
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