I bought two cans of Kool-It evaporator & heater foaming cleaner. I used one on my 96 Z71, just squirted the can contents up through the drain on the AC housing, worked great. Problem is I cannot find the drain location on my 2001 Blazer, 2-door, 2 wheel drive. Been under the rig looking and under the hood with flashlight and mirror, felt under the bottom of the housing with my hands, no luck. I can run the AC and see water dripping out of the bottom front of the housing seam, where the two halves come togther around the lines to the accumulater/dryer, but no actual drain hole. Somebody point me in the right direction please.