1996 Buick Regal Owner's Manual - Page 324

Steering Column Lock Check While parked, and with the parking brake set, try to turn the key to LOCK in each shift lever position. 0 Park o n a fairly steep hill, with the vehicle facing downhill. Keeping your foot on the regular brake, set the parking brake. 0 The key should turn to LOCK only when the shift lever is in PARK (P). The key should come out only in LOCK. 0 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: With the engine running, shift to PARK (P). Then release all brakes. Parking Brakeand Automatic TransaxlePARK (P) Mechanism Check 0 Underbody Flushing Service When you are doing this check, your vehicle You or others could be could begin to move. injured and property could be damaged. Make sure there is room in frontyour vehicle in case of it begins toroll. Be ready to apply the regular brake atonce should thevehicle begin to move. 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. 7-38