GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2004 🢒 GMC C Sierra - 2WD 🢒 Service and Appearance Care 🢒 Bulb Replacement 🢒 Pickup Box Identification and Fender Marker Lamps

To replace a pickup box identification or fender marker lamp bulb:

  1. Press the tab from the back to remove the lamp.
  2. Unplug the lamp assembly harness.
  3. Gently pry the individual lamp from the lamp assembly.
  4. Unplug the lamp.
  5. Plug in a new lamp and snap it into the assembly.
  6. Reinstall the lamp assembly.