GM Service Manual Online
For 1990-2009 cars only

To replace a CHMSL bulb:

  1. Open the trunk.
  2. Press the tabs to release the bulb assembly.

  3. Object Number: 1826287  Size: B4
  4. Pull the bulb assembly down to access the bulbs.
  5. Pull the old bulb straight out.
  6. Push the new bulb straight in until it clicks.
  7. Align the tabs in the bulb assembly with the assembly in the trunk lid. Push the bulb assembly back into place until it snaps in. You may need to use a tool to guide the tabs into the assembly.