GM Service Manual Online
For 1990-2009 cars only

To replace the CHMSL bulb:

  1. Remove the two screws and lift off the lamp assembly from the vehicle.

  2. Object Number: 1240978  Size: B1
  3. Turn the bulb socket counterclockwise and remove it from the lamp assembly.
  4. Holding the socket, pull the bulb to release it from the socket.
  5. Push the new bulb into the socket until it clicks.
  6. Insert the bulb socket into the lamp assembly and turn it clockwise to secure.
  7. Reinstall the lamp assembly and tighten the screws.