See also:

Ignition Transmission Lock Check
While parked, and with the parking brake set, try to turn the ignition to LOCK/OFF in each shift lever position. The ignition should turn to LOCK/OFF only when the shift lever is in P (Park). ...

Taillamps, Turn Signal, Stoplamps, and Back-Up Lamps
A. Back-Up Lamp B. Turn Signal Lamp To replace one of these lamps: 1. Open the trunk. See Trunk. 2. Remove the fasteners and pull back the trunk trim. 3. Remove the four plastic wing nuts h ...

General Information
For service and parts needs, visit your dealer. You will receive genuine GM parts and GM-trained and supported service people. Genuine GM parts have one of these marks: ...