1998 Oldsmobile Silhouette Owner's Manual - Page 408

Ignition Transaxle Lock Check While parked, and with the parking brake set, try to turn the ignitionkey to LOCK in each shift lever position. The key should turn to LOCK only when the shift lever is in PARK (P). 0 Park on a fairly steep with the vehicle facing hill, downhill. Keeping your foot on the regular brake, set the parking brake. 0 The key should come out only in LOCK. 0 Parking Brake and Automatic TransaxleE Merhnnism Check To check the parking brake's holding ability: With the enginerunning and transaxle in NEUTRAL (N), slowly remove foot pressure from the regular brake pedal. Do this until thevehicle 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 When youare doing this check, your vehicle could begin to move. You or others could be injured andproperty could be damaged. Make sure there is room in front your vehicle in case of it begins to roll. ready to apply the regular Be brake at once should vehicle beginto move. the At least every spring, use plain water to flush any corrosive materials from theunderbody, Take care to clean thoroughly any areas where mud and other debris