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a87ss305
04-19-2001, 08:58 PM
Does anyone know which A/C compressor the 81-91 big block crew cabs used? The R4 or A6? Or could they have used both? I'm considering buying a 76 parts truck with the A6 compressor and was wondering if it would be compatable with the 81-91 crew cab that I will purchase when I find a good rust free cab to buy in the future.-Thanks Mark

Dave1250
04-19-2001, 09:46 PM
If you Email me with all info on truck I will look it up . But if the truck has been sitting a while the seal will be leaking around the shaft behind the clutch most likely .
clemonsd@westelcom.com Good luck

John DiMartino
04-19-2001, 10:24 PM
Im 98% sure the 81 and newer use the R4-across the board on GM's.