2003 GMC Sonoma Owner's Manual - Page 318

Bulb Replacement See Replacement Bulbson page 5-60for the proper types of bulbs to use. For any bulb changing procedure not listed in this section, contact your GM dealer's service department. Headlamps One-Piece Composite Headlamp System 1. Open the hood. Halog-r Bulbs I logen bulbs havepressurized 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. I 2. Remove the black retainer clips by lifting up. 3. Pull the headlamp assembly out. 4. Unplug the electrical connector. 5-55