Swims350
I'm Awesome
I was never a fan of cab lights, but ebay has some clear covers for the factory style like posted above for anyone interested.
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the only thing they need is a lil bit of silicone around the bottom along the edges to keep anything from leaking
Looks good man. IMO the GMT400 cab light is one of the best lookin cab lights out there.
You shouldn't need silicone under them, factory light never used any. I didn't use any on my install and mine haven't leaked to date, and I live in washington. Sine you didn't get OEM lights, how did those attach? Is it just a sheet metal screw? If so, you could swap that out for a machine screw and rubber expansion well nut so you can really tighten them down and not worry about stripping the roof out.