Once in awhile, Ill get some water coming down inside the cab. It slowly will stream down the side wall of the cab on the passenger side under where the bottom of the dash is. The size of the amount of water that comes in is small and it doesnt happen on every rain. I have stripped the carpet, etc out anyway since I am redoing the interiopr of my 88 anyway.

Has anyone dealt with this before?

Thanks a bunch

 

Get some cheap baby/talcum powder and sprinkle on the walls. Water will leave a "snail trail" where it's coming in. Old mechanic taught me this yrs ago.

 

Does your truck have a/c? Check the drain to make sure it isn't full of gooky stuff (<---Fancy technical term) Use a zip tie or pipe cleaner to run up there to make sure it's open. Do NOT get your face under there as a gush of nasty water might come out. Even if you don't have a/c, there are drains that empty the water running off the windshield. Leaves can build up and work its way inside.