The hi side service port has a R134 QC fitting with a built-in check valve, not a schrader type. It mounts to the hard line with a 1/2 inch male Acme thread. I can't seem to find a replacement part - is this a "one-off" unique to this vehicle, or am I missing something?
Because 1995 was a transition year from R12 to R134, I'm starting to suspect GM made a unique part to put a R134 service coupling onto a R12 pipe they already had from the previous model year. The original part is leaking badly and needs replacing.
The valve is replaceable and sold by this site's sponsor- just click on a/c kits link above
a good cap with a rubber element will seal the leaky valve---believe it or not it works all valves leak a given amount- that is how I test my sniffer
1994 was the transition model year for S/T platform trucks
The number one A/C diagnostic tool there is- is to know how much refrigerant is in the system- this can only be done by recovering and weighing the refrigerant!!
Just a thought.... 65% of A/C failures in my 3200 car diagnostic database (GM vehicles) are due to loss of refrigerant due to a leak......
Thanks for the clarification on GM transition to 134a. I was able to find the valve part locally, listed as a Ford component. Now I can pump out and recharge the system with some confidence.
We've updated our forums!
Click here to visit the new forum
Copyright © 2016 Arizona Mobile Air Inc.