Hello CF members, I've used forums to gather info on many topics but have not been a member until now. I own a 92 C1500, Cheyenne, short bed, 4.2 L, Automatic. It has 286,000 miles and still going strong. I'm in the begining stages of some slight customizations. Currently my A/C refuses to work. It started out as an R12 system, I converted to R134A, vacumed and refilled the system. It worked for last years summer season but recently has quit. I'm considering replacing the main components just so I can start over with a new system. I welcome any comments or suggestions.