'98 Silverado XCab. The gasket is shot for my rear cargo area lamp and water leaks inside the cab when it rains (rarely) or go thru the carwash (weekly). I also run the Sirius antenna cable under the housing and thru the hole for the lamp wiring so a stock replacement gasket probably wouldn't work. Any homegrown gasket ideas or should I just run a bead of silicone around in and trim off the excess?

 

Best bet is clear silicone. Run a bead and have a cup of water to wet your finger and smooth out the bead. If done right, no trimming is needed.

 

Thanks for the info - I'll let you know how it goes.

 

Good deal.

 

finally had a chance to get the truck washed and NO LEAKS! I had some hi-temp gasket maker left over from the water pump replacement. I spread a bead on both sides of the existing gasket and all is well!

 

Sweet!