1996 Oldsmobile Silhouette Owner's Manual - Page 343

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 on a fairly steep hill, with the vehicle facing downhill. Keeping your foot on the regular brake, set the parking brake. The key should turn to LOCK only when the shft 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. Underbody Flushing Service Parking Brake and Automatic Transaxle PARK (P) lism Check When you are doing this check, your vehicle could begin tomove. You or others could be injured and property could be damaged. Make sure there is room front of your vehicle in case in it begins toroll. Be ready to apply the regular brake at once should the vehicle 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. 7-37