1996 GMC Safari Owner's Manual - Page 343

Starter Switch Check Brake-Transmission Shift Interlock(BTSI) Check 1 A CAUTION: When you aredoing this check, the vehicle could move suddenly.If it does, you or others could be injured. Follow thesteps below. 1 . Before you start, be sure you have enough room around the vehicle. 2. 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. A CAUTION: I I I move suddenly.If it does, youor others could be When you are -d o injured. Follow thesteps below. 1. Before you start, be sure you have enough room around the vehicle. It should be parked on a level surface. 2. Firmly apply the parking brake (see "Parking Brake" in the Index if necessary). 3. 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. NOTE: Be ready to apply the regular brake immediately if the vehicle begins to move. 3. With theengine off, turn 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 outof PARK (P), your vehicle's BTSI needs service. 7-43