GM Service Manual Online
For 1990-2009 cars only

Center High-Mounted Stoplamp (CHMSL) All Sedan Models Only

For the type of bulb required for replacement, see Replacement Bulbs .

To change a CHMSL bulb, do the following:

  1. Remove the CHMSL cover by pulling down on the cover edges.

  2. Object Number: 1225899  Size: B3
  3. Turn the bulb socket out of the stop lamp and remove the bulb.
  4. Replace with the appropriate bulb.
  5. Replace the cover.