After being told by two different auto svc facilities that the A/C in my old 90 GMC P/U truck needed to be replaced, I had given up on it; drove around in the summer with the windows open. I took the GMC to Northgate to check the vent blower and to give me an estimate to replace the A/C. They discovered that the compressor was disconnected and a wrong size fuse was in the system. For a minimal fee, my ol' 90 now has a functioning HVAC system. It is such a great feeling to find an honest auto service facility.