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I replaced the AC compressor, condenser, accumulator and orifice tube in my 2004 coupe. As I was removing the low pressure manifold quick-disconnect, I noticed a slight hiss from the Schroeder valve, so I need to replace it (tried tightening it in case it was just loose; no luck).
I will be picking up a tool to replace the valve without having to discharge the system. I have not been able in my searching to figure out what type of valve GM used on a 2004 low pressure service port -- standard? Eaton? GM large?