I was just wondering what a jtec PCM was? Apparently my truck is running one because on the frame right before the radiator shroud is a little sticker that says Jtec PCM in use. It actually says Jtec PCM and then a few numbers, but I was just wondering what kind of dealer modification it was. The new PCM was installed by the dealer in 2001 or according to the sticker.

 

The JTEC is on the passenger side fire wall and controls transmission, charging system and other variouus functions seperate from the cummins ecm.

 

what else does the jtec run