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
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.
