1997 Chevrolet Suburban Owner's Manual - Page 398

Starter Switch Check Brake-Transmission Shift Interlock(BTSI) Check I I N: When you are doingthis check, the vehicle could move suddenly. If it does, you or others could be injured. Follow the steps below. I move suddenly. If it does, you or others could be injured. Follow the steps below. I 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 Indexif necessary) and the regular brake. 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). NOTE: Do not use the accelerator pedal, and be ready to turn off the engine immediately if it starts. NOTE: Be ready to apply the regular brake immediately if the vehicle begins to move. 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. 3. With the engine 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 out of PARK (P), your vehicle's BTSI needs service. 7-45