The air conditioning compressor may develop an abnormal noise and require replacement. We recommend that whenever an AC compressor is being replaced for a noise condition, a filter kit should be installed to prevent any metal particles in the system from damaging the new compressor.Google+
Car Problem Reports
GMC 1500 Pickup Air Conditioning Compressor May Become Noisy
GMC 1500 Pickup Problem
Recently overhauled this 4.3L due to quick connect fitting breaking off an causing overheating. Engine now runs great however, there is a bad vibration with the a/c on between idle speed and 1300 rpms.Only makes this vibration with a/c on and stops above 1300 rpm,s. A/C compressor replaced with new 6 months ago.
Visitor, 1995 GMC 1500 Pickup
Growling compressor accompanied with a high pitch whine, that pierces one's ears.