Yes they are completely different. The older style is a GM compatible compressor, 100 bucks at autozone. The 01 is a completely different, and they have different fittings as well. No match up. If you go to isuzuparts.com, you can get the oem part numbers.





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I know, we've discussed this before. I'm on a mission to figure this out this conundrum. You're giving me a complex... 

). The wiki would include part #s and this bearing fix but I can't get past the part numbers.
