Well I guess my next step is to pull the vacuum a few times, then try a dye injection kit. Can you rent a sniffer from one of the auto parts stores? I don't happen have one of those.

Hello! I'm trying to find a leak on a 2009 Enclave, which takes about 6 weeks to 2 months to totally leak out all it's refreigerant after a recharge. I put an air compressor on the system to pressurize it to look for leaks, but could not find any obvious leakage. I left it pressurized at 125 psi on ...