1993 Buick LeSabre Owner's Manual - Page 293

CHECK OR SERVICE Parking Brake and Automatic Transmission "P" (Park) Mechanism Check WHAT TO DO CAUTION: 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 there i room in front of your s vehicle in case begins to roll. it Be ready to apply the regular brake should once the at I CHECK OR SERVICE Underbody Flushing I WHAT TO DO At least every spring, use plain water to flushany corrosive materials from the underbody. Take care to clean thoroughly any areas where mud and other debris can collect. - Park on a fairly steep hill, with the vehicle facing downhill. Keeping your foot on regular brake, set the the parking brake. To check the parking brake: With the engine running and transmission in " N ' (Neutral), slowly remove foot pressure from the regular brake pedal. Do this until the vehicle is held by the parking brake only. To check the "P" (Park) mechanism's holding ability: Shift to "P' (Park). Then release all brakes.