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Left side parking lights inop

nstiesi

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Aug 15, 2025
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Florida
Buick Ownership
2018 Regal TourX Preferred
Hi all! Had my TourX for a month now and I love it, even despite the little leak incident that is now solved (Wet rear passenger carpet) thanks to all who tried to help!

Got another one. Noticed that my tail light was out, specifically the led portion on the top. Brakes, signals all work.

Also noticed that it's actually the whole left side: "eyebrow", side marker, and tail. The quarter panel mounted light on that side had water in it when I bought it, so I pulled it to dry it out. I noticed that while it was out, the front and side parking lights started working. I'm guessing something about the led module in the rear light was affected by moisture and is now taking down the circuit for the left side park lights.

I'm sure the LEDs are not user serviceable in the traditional sense, but is there any hope to open the housing and fix it? Should I just focus on finding a replacement? New units seem to go for anywhere from $250 to $500. Used can be a bit cheaper, but maybe just buying another problem.

Anyone have experience here?

Thanks!
 
Slight update: I pulled the lamp and dried it out thoroughly. I opened all the holes and pointed a hair dryer in there for about 2 hours, using compressed air every so often to make sure any standing water got blown into droplets. Its bone dry in there now. The LED module still seems to not work. It lights up briefly but immediately turns off.

However the good news is that its no longer taking down the whole circuit, as the eyebrow/sidemarker/hatch mounted tail light now seem to be working consistently.
 
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