Driving my 98 Cummings today and made a left and noticed a HUGE flood of water come out of the floor vent at the passenger floorboard. Apparently some dirt bag (dirt dobber) had made residence inside my A/C drain tube and plugged it up. Got home and stick the air schnozzle up the exterior drain hose and gave it a poof of air and there bust have been 2.5 gallons that came flowing out 
. I had been noticing that the interior had a “moist” air smell when running the A/C.
Side note is, yes, it’s a 98 ram 2500 and it shits ice cubes out the vent!
