Check your window seals and make sure there is no water getting in around your cab lights because any water that gets in under the roof will drain down the A-pillar and into your floor boards

No smell. Heater core not leaking. new cab lights and gaskets. windshield does not leak. could it be where it gets hot from exhuast does not do it with no floor mat out of the truck

Windshield will leak, I dont have cab lights and mine leaked on the passenger side top corner. Same with my first gen.

it was exhaust causing moisture because exhaust was to close to passenger floor board and got it hot but ac had inside cool and it built moisture under floor mat it stayed dry with no floor mat in