1993 Buick Park Avenue Owner's Manual - Page 308

CHECK OR SERVICE Brake-Transaxle Shift Interlock -- BTSI (Automatic Transaxle) WHAT TO DO CHECK OR SERVICE Steering Column Lock WHAT TO DO ~ ~~ While parked, and with the parking brake set, try to turn the to key "LOCK" in each shift lever position. The key should turn to "LOCK" only when the shift lever is in "P" (Park). 0 injured. Follow the steps below. I' 1. Beforeyou 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: 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 move the shift lever out of " P ' (Park) with normal of effort. If the shift lever moves out "P" (Park), your vehicle's BTSI needs service. The key should come out only in "LOCK."