2003 2500HD water leaking

[Dan86]

Got a 03 2500hd. Water soaked passenger floorboard and rear passenger floorboard only. Every time it rains. What could it be to look at? Replaced weather stripping under cowl. Still getting soaked?

[SunShine01]

Gotta be your seal around the windshield or doors.

If it wasn’t raining I’d say heater core.


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[davester]

If the door hinges have been replaced, the hinges can leak into the cab (as the roof basically drains right over the hinges).  The hinges are originally welded to the cab, so they don't leak then, but replacements are bolted on, and they can leak into the cab.  This happened to me, and it took me quite some time to figure it out.

[GMC Lewy]

Check your cab vents and the seal around the cab window they are know to leak especially through the cab vents