I have been in the car repair business for over 50 years and this is the first time I have heard of this light. I would imagine it is the tail light and you have to get to the back of the light to change the bulb. If you can't get to it through the trunk, the light has to be removed.
Buick Regal was created in 1973.
P0410 2002 buick regal
which fuze controls the air in a buick regal
where is the thermostat located on 95 buick regal
Should have access after removing inner door panel
Possibly in the Parts department of a Buick dealership or at a large auto parts store.
The 2001 Buick Regal has 12 valves.
The 2013 Buick Regal has 16 valves.
The 2003 Buick Regal has 12 valves.
The 2014 Buick Regal has 16 valves.
The 2002 Buick Regal has a V6 engine.
The 2011 Buick Regal has 16 valves.