GM Service Manual Online
For 1990-2009 cars only

Center High-Mounted Stoplamp (CHMSL) Sedan

To replace a center high-mounted stoplamp (CHMSL) bulb:

  1. Open the trunk. See Trunk .
  2. Locate the center high-mounted stoplamp (CHMSL) on the inside of the trunk lid.
  3. Disconnect the wiring harness.

  4. Object Number: 1580923  Size: B2
  5. Remove the cover by pressing the tabs at either end with a tool.
  6. Remove the bulb by turning it counterclockwise.
  7. Turn the bulb clockwise to install it.
  8. Reinstall the cover and reconnect the wiring harness.

Center High-Mounted Stoplamp (CHMSL) Retractable Hardtop and Coupe

If your vehicle has this component and it needs replacement, it is recommended that it be replaced as a unit by your dealer/retailer.