GM Service Manual Online
For 1990-2009 cars only

To replace a side identification marker bulb, do the following:

  1. Locate the lamp gasket near the rear wheel to expose the service slot and pull back the edge.
  2. Using a flat tool, push into the slot to release the lamp housing.
  3. Pull the housing out to expose the wiring harness and connector.
  4. Unplug the lamp assembly harness from the housing.
  5. Unplug the lamp.
  6. Put in a new lamp and snap it into the housing.
  7. Reinstall the lamp housing.