Quote Originally Posted by mouzer View Post
yes mine is r12 and needs to be r134
Easy deal, not sure about GMs but many fords were already using the urethane O-rings at that point in time...

PM me with a good time to call you IF you don't get a hook up from someone else and in the mean time look for potential leaks... Around the compressor lines, behind the clutch on the compressor, at the unions, around the condensing unit... You may just slightly hit one of the schrader valves to see if the system is TOTALLY flat or if there is still some charge left...

IF you were here I would be a buddy and give you two lbs of R12 but Im not packing it on the airplane... Personally I just swap all of the stuff I work on over to R134 and be done with it... WOrks great and is easy to get around here, usually you can find it on sale this time of year...

Whatever you do, DON'T put any of that stop leak shiiaaat in the system...