A/C Issue
2003 Chevy Tahoe 5.3L. My wife started the Tahoe and she heard a pop and white smoke (R134a) come out from under the hood on the passenger side. When I checked under the hood I saw oily residue on the bottom side of the hood right above the high pressure schrader valve for the A/C unit. I run the engine for a few min then turned it off and could hear hissing from the same fitting. My question is it possible this valve "popped" off loud enough to hear from inside the vehicle with the engine running or should I look for another leak? Has anyone had the same problem? I looked in the fitting and saw a black rubber cap/diaphragm shape, I assume the schrader valve is under it?
2007 GMC SIERRA CLASSIC
6.6L LBZ 136,000 miles
Diablo Sport Predator Tuner (MPG Tune)
LT245/75R16E
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