1998 Chevrolet Express Van Owner's Manual - Page 352

Ignition Transmission Lock Check While parked, and with the parking brake set, try to turn the ignition key to LOCK in each shift lever position, 0 Park on a fairly steep hill, with thevehicle facing downhill. Keeping your foot onthe 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. Parking Brake and Automatic Transmission P A R K (P) MerhslnicTn Vhmk To check the parking brake's holding ability: With the engine running and transmission 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. 1 A 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 of sure thereis room in front your vehicle in case it begins toroll. Be ready to apply the regular brake at once should the vehicle beginto move. 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. 7-41