2004 GMC Sonoma Owner's Manual - Page 293

Headlamps One-Piece Composite Headlamp System 1. Open the hood. 5. Turn the bulb assembly counterclockwise to remove it from the headlamp assembly. 6. Put the new bulb into the bulb assembly and reinstall it in the headlamp assembly by turning it clockwise until it is tight. 7. Plug in the electrical connector. 2. Remove the black retainer clips by lifting up. 3. Pull the headlamp assembly out. 4. Unplug the electrical connector. 8. Put the headlamp assembly back into the vehicle. 9. Install the two retaining clips. 10. Close the hood. 5-49