1996 Buick Park Avenue Owner's Manual - Page 359

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. @ A CAUTION: When you are doing this check, your vehicle could begin tomove. You or others could be injured and property could damaged. Make be sure thereis room in front your vehicle in case of it begins to roll. Be ready to apply the regular vehicle begin to move. brake at once should the To check the PARK (P) mechanism's holding ability: With the engine running, 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. Takecare to clean thoroughly any areas where mud and other debris can collect.