1998 GMC Safari Owner's Manual - Page 377

Starter Switch Check Brake-Transmission Shift Interlock. (B-TSI) Check I A CAUTION: When youare doing this check, the vehicle could move suddenly.If it does, youor others could be injured. Follow the steps below. 1. Before you start, be sure you have,enough room around the vehicle. 'A CAUTION: I When youare doing this check, vehicle could the move suddenly.If it does, you or others could be injured. Follow the steps 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). 2. Firmly apply both the parking brake (see "Parking Brake" in the Index if necessary) andthe regular brake. NOTE: Do not use the accelerator pedal, and be ready to turn off theengine immediately if it starts. 3. Try to start the engine in each gear. The starter should work onlyin PARK (P) or NEUTRAL (N). If the starter worksin any other position, your vehicle needs service. NOTE: Be ready to apply the regular brake immediately if the vehicle begins to move. 3. With the engineoff, t r the key to theRUN position, un 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 theshift lever moves outof PARK (P), your vehicle's BTSI needs service. 7-43