2004 GMC Sonoma Owner's Manual - Page 295

One-Piece Front Turn Signal Lamps 1. Remove the headlamp assembly as shown in "One-Piece Composite Headlamp System" under Headlamps on page 5-49. 2. Twist the bulb socket counterclockwise to remove it from the headlamp assembly. Two-Piece Front Turn Signal Lamps 1. Remove the headlamp assembly as shown in "Two-Piece Composite Headlamp System" under Headlamps on page 5-49. 2. Locate the locking tabs on the assembly. Squeeze the tabs together and push that end of the assembly out while holding the tabs. The assembly will swing out. 3. Pull the bulb straight out to remove it from the socket. 4. Push the new bulb into the socket until it snaps into place. 5. Put the bulb socket into the lamp assembly and twist it clockwise until it is tight. 6. Put the headlamp assembly back into the vehicle. 7. Install the two retaining clips. 8. Close the hood. 3. Unplug the electrical connector. 5-51