See also:

Replacement Bulbs
For replacement bulbs not listed here, contact your dealer. ...

Taillamps, Turn Signal, Sidemarker, Stoplamps, and Back-Up Lamps
A. Stop/Tail/Turn Signal/ Sidemarker Lamp B. Auxiliary Taillamp C. Back-up Lamp ...

Cellular and GPS Antennas
Avoid placing items over or near the antenna to prevent blocking cellular and GPS signal reception. Cellular reception is required for OnStar to send remote signals to the vehicle. ...