From what i gather, no you cannot use a different year pcm in your truck. Will set codes as it does not "gell" with the other modules. I'm not 100% on that, but pretty sure. We are working on getting the 01 problems ironed out to make sure they are all addressed. Stay tuned.
The Hypertech doesn't bypass ANY year Duramax for the speed limiter. TTS offers a Powerloader II programmer that will on the 2001's. That's it so far. Most of the other programmers will do it on 2002's and newer, but not on the 2001's. I've heard that Quad is working on this, too, but I don't know what the timeframe is. I was going to buy a Bullydog Power Pup, until I found out that it didn't do the bypass thing on the 2001's. So I bought the Banks Six-Gun. I'll wait and see if the RaceBox that Banks is working on will do it. I wonder what the deal is with bypassing the speed limiter on the 01's? Damn.
I THINK ITS TOTAL BULLsh*t THAT ALL OF THESE TUNER SELLING PEOPLE ADVERTISE THAT THIER PRODUCT WILL REMOVE THE LIMITER ON THE "01-EARLY 04" YEAR MODEL TRUCKS. WTF IS WRONG WITH TELLING THE DAMNED TRUTH??????????
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