mystery leak

[copernicusd]

so I've been trying to figure out why it leaks on passenger side when it rain for awhile now
didn't know if it was the seals or what
and the other day i think i may have found something, it looked like on the cover to the heater blower was leaking, i didn't think the blower had water going thru it, or does it?
and what would that have to do with rain, or maybe its 2 separate leaks

 

[1997chevydriver]

Very common on these trucks. Its either one of the screws holding the black cowl piece below the window on the passenger side or the metal cover that is basically glued on under the cowl piece

 

[1993GMCSierra]

Mine is doing the same, I need to fix it. Went to put some paper on the pass. floor mat and it turned wet instantly. Floor mat/carpet is soaked with water.

 

[Gatorboy]

We have talked about this many times. I even started a thread about it a while back. It is the screw holes under the cowl.

 

[copernicusd]

how do I get to it, take out the heater core?

 

[1997chevydriver]

No. Take the cowl piece off between hood and windshield.