I have a 2004 1/2 Duramax LLY w/Allison Tranny. I was in the process of installing the Hypertech Programmer III and the unit reported a DTC Code of U0106. I cleared the DTC and installed the Hypertech program but the DTC code comes back within 30 seconds of switching off the key. I do not even have to start the truck for the trouble code to return. Does anyone have any idea what this code is? I contacted 2 dealers and they advised to just ignore it but I figure if GM has the code then it must be for a reason. I even called Chevrolet and they said, after calling my dealer that it might be something with the ABS but when I checked that is a entirely different code. Please help...Thanks