1999 GMC Sonoma Owner's Manual - Page 275

yellowblue Two-Piece Composite Headlamp System 1. Open the hood. 5. Turn the bulb assembly counterclockwise to remove it. 2. Remove the black retainer clips by lifting up. 3. Pull the headlamp lens assembly out. 4. Unplug the electrical connector. 6. Put the new bulb assembly into the headlamp assembly and turn it clockwise until it is tight. 7. Plug in the electrical connector. 8. Put the headlamp lens assembly back into the vehicle. Install the two retaining clips. 6-37