2010 GMC Acadia Owner's Manual - Page 344

10-28 Vehicle Care Backglass Wiper Blade To replace the backglass wiper blade: 1. Pull the wiper blade assembly away from the backglass. The backglass wiper blade will not lock in a vertical position so care should be used when pulling it away from the vehicle. 2. Rotate the wiper blade assembly, hold the wiper arm in position, and push the blade away from the wiper arm. 3. Replace the wiper blade. 4. Return the wiper arm and blade assembly to the rest position on the glass. 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/ retailer 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/retailer. Halogen Bulbs { WARNING Halogen bulbs have pressurized gas inside and can burst if you drop or scratch the bulb. You or others could be injured. Be sure to read and follow the instructions on the bulb package.