2004 GMC Yukon Owner's Manual - Page 435

Headlamps A. Low-Beam Headlamp B. High-Beam Headlamp 2. Pull the headlamp assembly out. 3. Unplug the electrical connector. 1. Your vehicle is equipped with two pins, remove the two pins on the top of the headlamp assembly. To remove the pins, turn the outer pin outward and pull it straight up. To remove the inner pin, turn it in and pull it straight up. 4. Turn the old bulb counterclockwise and remove it from the headlamp assembly. 5. Put the new bulb into the assembly and turn it clockwise until it is tight. Use care not to touch the bulb with your fingers or hands. 6. Plug in the electrical connector. 7. Put the headlamp assembly back into the vehicle. Install and tighten the two pins. 5-57