Mine did the same thing. Ended up being a fried ECM. Every time we hooked the computer up it would say.cannot comunicate. Could be the skim. But like I Said mine did the same thing and I ended up buying a used ECM and got h&s to program it to my truck. Good luck with it.
After getting the truck here at the shop we hooked the laptop up and found that it was a bad ecm. I located a good used one out of another 07 6.7 auto. Will we need to use a h&s to program it to the truck or will it work since its the same year?
thanks
You need to have it programmed so the VIN # in the ECM matches the one in the PCM. Best bet is just take it to the dealer to have them program it unless you can flash it with EFILive.
Tobin