1999 Cadillac DeVille Owner's Manual - Page 310

yellowblue Rear Turn Signal Lamps and Taillamps 1. Loosen the upper TorxR screw, but don't remove it. 2. Gently tilt the top portion of the lamp housing to access the bulb sockets. If you can't access the lower bulb socket, remove the lamp housing completely. 3. Press the bulb socket housing lever and turn the socket counterclockwise to remove it. 6-40