GMC 1998 Safari Owner's Manual page 377

Starter Switch Check
Brake-Transmission Shift Interlock. (B-TSI) Check
I
A
CAUTION:
When you are doing this check, the vehicle could
move suddenly. If it does, you or others could be
injured. Follow the steps below.
1.
2.
3.
Before you start, be sure you have,enough room
around the vehicle.
Firmly apply both the parking brake (see "Parking
Brake" in the Index if necessary) and the
regular brake.
NOTE: Do not use the accelerator pedal, and be
ready to turn off the engine immediately if it starts.
Try to start the engine in each gear. The starter
should work only in PARK (P) or NEUTRAL (N).
If the starter works in any other position, your
vehicle needs service.
'
A
CAUTION:
When you are doing this check, the vehicle could
move suddenly. If it does, you or others could be
injured. Follow the steps below.
1.
2.
3.
Before you start, be sure you have enough
room around the vehicle. It should be parked
on a level surface.
I
Firmly apply the parking brake (see "Parking Brake"
in the Index if necessary).
NOTE: Be ready to apply the regular brake
immediately if the vehicle begins to move.
With the engine off, t u r n the key to the RUN position,
but don't start the engine. Without applying the regular
brake, try to move the shift lever out of PARK (P) with
normal effort. If the shift lever moves out of
PARK (P), your vehicle's BTSI needs service.
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