1997 Pontiac Sunfire Owner's Manual - Page 352

Brake-TransaxleShift Interlock (BTSI) Check Ignition Transaxle Lock Check (Automatic Transaxle) While parked, and with the parking brake set, try to turn the ignition key to LOCK in eachshift lever position. I With an automatic transaxle, the key should turn to LOCK only when the shift lever is inPARK (P). 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. Before you start, be sure you have enough room 0 With a manual transaxle, the key should turn to LOCK only when the shift lever is in REVERSE (R). On vehicles with a key release button, try to turn the key to LOCK without pressing the button. The key should turn to LOCK only when you press the key button. 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). On all vehicles, the key should come outonly in LOCK. Turn the steering wheel to the left and to the right. It should only lock when turned to the right. NOTE: Be ready to apply the regular brake immediately if the vehicle begins to move. 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 movethe shift lever out of PARK (P) with normal effort. If the shift lever moves out of PARK (P), your vehicle's BTSI needs service.