About Jim Gautreau Expertise I can answer just about any question to do with GM products, mostly Buick, Pontiac, GMC, and Chevy. I was an electrical, trim, and A/C specialist, and I am now a driveabilty specialist at a dealership.
I have also done work in all other areas except for transmission overhauls.
Experience 6yrs as a dealership technician
ASE Certified Master Technician
GM Mark of Excellence Platinum Award 2005, Gold Award 2004
Expert: Jim Gautreau Date: 6/14/2006 Subject: 97 GMC Suburban AC
Question The AC compressor on my 1997 GMC Suburban will not engage. It appears that there is no power to the compressor clutch. I have checked all of the fuses I can find and I have replaced the AC relay under the hood. It will not engage when I press the AC button or when I turn on the defroster. All of the fans inside work.
Answer You either have a low charge which is preventing it from working, or the low pressure cycling switch is stuck. The switch is on the accumulator near the passenger side firewall. Try useing a paper clip to jump it and see if your A/C works. If it does then you need to replace that switch.
I am sorry that it took so long to reply, it has been very busy around here.
