2004 Buick Regal Owner's Manual - Page 265
2004 Buick Regal Manual
Page 265 highlights
Center High-Mounted Stoplamp (CHMSL) 1. Open the trunk. 3. Remove the old bulb by turning it counterclockwise one-quarter turn. 4. Push the new bulb into the bulb socket. 2. Reach through the access opening in the trunk lid. 5. Turn the socket clockwise one-quarter turn to reinstall. 5-57
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