1996 Buick LeSabre Owner's Manual - Page 326

Steering Column Lock Check While parked, and with the parkingbrake set, try to turn the key to LOCK in each shift lever position. The key should turn to LOCK only when the shift lever is in PARK (P). The key should come out only in LOCK. Parking Brake and Automatic Transaxle PARK (P) Mechanism Check Park on a fairly steep hill, with the vehicle facing downhill. Keeping your foot on the regular brake, set the parking brake. To check the parking brake: With the engine running and transaxle in NEUTRAL (N), slowly remove foot pressure from the regular brake pedal. Do this until the vehicle is held by the parking brake only. To check the PARK (P) mechanism's holding ability: Shift to PARK (P). Then release all brakes. Underbody Flushing Service At least every spring, use plain water to flush any corrosive materials from the underbody. Take care to clean thoroughly any areas where mud and other debris can collect. When you are doing this check, your vehicle could begin to move. You or others could be injured and property could be damaged. Make sure thereis room in frontof your vehicle in case it begins to roll. ready to apply the regular Be brake at once should thevehicle begin to move. 7-40