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Possibly either a heater core or a windshield leak.I have a 92 extended cab it has a water leaking on the passenger floor any ideas
thanks Robo
My '90 was leaking for a long time. It was making the headliner wet in the very front right hand side and dripping on the floor.
I had the winsheild replaced twice and that didn't fix it. I got up on the roof with a garden hose and saw that the leak was coming from the rain gutter. The seam sealer that filled the gutter was all old and cracking. I scraped it all out and put in some new 3m seam sealer. I let it dry and then painted over it. That fixed it. No more leaking.