I know that you should be able to pull one from a 98-99 and probably a '00 auto tranny Trooper. In '01 I think is when they moved the PCM to the engine bay and that one won't work. Get one from your local pull and pay. I'm running one from a '98 but it's a manual trans one. The one issue I had was the calibration of my fuel gauge. I fixed this by swapping the fuel level sending unit. The sending unit is very easy to pull off the donor vehicle (six Phillips screws) along with the PCM.