2007 Chevrolet Impala Owner's Manual - Page 418

Automatic Transaxle Shift Lock Control System Check Ignition Transaxle Lock Check While parked, and with the parking brake set, try to turn the ignition to OFF in each shift lever position. • The ignition should turn to OFF only when the shift lever is in PARK (P). • The ignition key should come out only in OFF. Contact your GM Goodwrench® dealer if service is required. {CAUTION: Whenyou are doing this inspection, the vehicle could move suddenly. If the vehicle moves, you or others could be injured. 1. Before you start, be sure you have enough room around the vehicle. It should be parked on a level surface. 2. Firmly apply the parking brake. See Parking Brake on page 120. Be ready to apply the regular brake immediately if the vehicle begins to move. 3. With the engine off, turn the ignition to RUN, but do not start the engine. Without applying the regular brake, try to move the shift lever out of PARK (P) with normal effort. If the shift lever moves out of PARK (P), contact your GM Goodwrench® dealer for service. 418