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:

Vehicle Care
California Proposition 65 WarningTaillamps, Turn Signal, Sidemarker, Stoplamps, and Back-Up Lamps
Trunk Deck Inboard Taillamps
1. Open the trunk.
2. Remove the trunk deck trim cover (1).
3. Remove the bulb socket (2) by turning counterclockwise and pulling straight out.
4. Remove the bulb from the socket.
5. Install the new bulb in the bulb socket.
6. Install the bulb socket by turni ...
Wiper/Washer System Description and Operation
Wiper/Washer System Components
The wiper/washer system consists of the following electrical components:
Windshield Wiper Relay
Windshield Wiper Speed Control Relay
Windshield Washer Pump Relay
Rain Sensor (optional)
Windshield Washer Fluid Pump
Windshield Wiper Motor
Window Wiper/Wa ...
Headlamp Replacement
Preliminary Procedure
Remove the front bumper fascia upper bracket. Refer to Front Bumper Fascia
Replacement.
Headlamp Screw (Qty: 4)
Caution: Refer to Fastener Caution in the Preface section.
Tip
Secure the headlamp fasteners in sequence, as indicated.
Tighten
2.5 N·m (22 lb in)
...