2003 GMC Sierra 1500 Pickup Owner's Manual - Page 437

. . I If your vehicle has one pin on the headlamp assembly, remove the pin. To remove the pin, turn the pin up and pull it out straight out. A. Low-Beam Headlamp B. High-BeamHeadlamp 2. Pull the headlamp assembly out. 3. Unplug the electrical connector. 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 theheadlamp assembly back into vehicle. the Install and tighten the two pins. If your vehicle has one pin, install it and turn it into the locking feature. 5-62