2012 GMC Acadia Owner's Manual - Page 333

Vehicle Care 10-27 Headlamp Aiming Headlamp aim has been preset at the factory and should need no further adjustment. However, if your vehicle is damaged in a crash, the headlamp aim may be affected. Aim adjustment to the low-beam headlamps may be necessary if oncoming drivers flash their high-beam headlamps at you (for vertical aim). If the headlamps need to be re-aimed, it is recommended that you take the vehicle to your dealer for service. Bulb Replacement For the proper type of replacement bulbs, see Replacement Bulbs on page 10‑29. For any bulb‐changing procedure not listed in this section, contact your dealer. To replace one of these bulbs: 1. Open the liftgate. See Liftgate on page 2‑10. 2. Remove the convenience net, if the vehicle has one. Taillamps, Turn Signal, Sidemarker, and Stoplamps 3. Remove the two taillamp nut covers. A. Sidemarker Lamp B. Taillamp