1999 Cadillac Seville Owner's Manual - Page 304

yellowblue Center High-Mounted Stoplamp (CHMSL) The individual bulbs in the CHMSL are not serviceable. See your dealer for assistance. Rear Turn Signal Lamps and Taillamps 1. Open the trunk to gain access to the lamp housing. 2. Remove the rear compartment sill plate by removing the upper convenience net retainers, located at each end, as shown. 5. Remove the three wing nuts that fasten the taillamp to the body. 6. Gently remove the taillamp from the body. The taillamp is on the bottom of the housing and the rear turn signal lamp is on the upper part of the housing. 3. Move the spare tire cover out of the way. 4. Pull the trunk trim away to access the wing nuts. 6-40