the shifter is the same, but the 01-02 has an extra wire that goes into one of the tcm connectors. The 03-05 is just plug and play.
01-02 uses a hard wired connection directly to the TCM to disable 5th gear and give you 4th where the 03-05 trucks do it via class 2 data bus by holding the tow/haul button in.
no two different part numbers, the ones for 03-05 dont have the exta wire.
So i bought a tapshifter/allilocker that was on an lly, says 01-05 on the module, is this useless on my truck? Or can I make it work? I didnt realize there are differences between 01-02's and 03-05's.
I would say call FLEECE, but I remember how much trouble that was whenever I tried getting ahold of him.