2003 Buick Regal Owner's Manual - Page 261

Back-up Lamps A \ 5. Twist and/or pull the old bulb from the bulb socket. 6. Twist and/or push the new bulb into the lamp socket. 7. Twist and/or push the lamp socket into the trunk lid covering. 8. Reverse Steps 2 and 3 to reinstall the lamp covering. Replacement Bulbs I Exterior Lamps Back-up (Applique) I Number Bulb 1 1156 3155 Center High-Mounted Stoplamp (CHMSL) B I Front Turn Signal and Parking Lamps Headlamps, High Beam 4157NAK I 1. Open the trunk lid. 2. Remove the seven wing nuts (A) from the lamp covering. 3. Remove the lamp covering. 4. Twist and pull the bulb socket (B) from the trunk lid. I Headlamps, Low Beam II I 9005 I 9006 3057 Taillamps and Stoplamps/Turn Signal Taillamp (Applique) I 194 I For any bulb not listed here contact your dealer. 5-56