P59 and TAC issues Please help me get this rolling
lots to cover so ill try to keep this to the point, vehicle is a 05 Colorado with 4.8l, 4l80e, 2006 express van ecu and harness with 3 bar os. i purchased a 2006 TAC module and Harness assembly. i then purchased a 2006 envoy/trailblazer pedal assembly as that's what fits in my vehicle physically. i constantly get code U0107 lost comm with tac if i go over 40% throttle or make quick blips of the throttle. ive verified tac module grounds, ignition power, battery power, etc. swapped in another known good 2006 tac module, bought a replacement pedal harness, tried other 2006 pedals. same thing happens every time. I'm at a loss at this point and only thing i can reason is that the etc limits within the tune or something else is hanging me up. it seems that the app sensors in the pedal are seeing ranges the tac doesn't like. but tracking down that info on what ranges should be has been nearly inpossible, i found data for the older 3 APP sensor pedal assemblies and tested my assemblies to see how the APP sensors read to eachother, and the numbers are all very very different. so that diag was pointless. any input or direction is much appreciated, I'm a HP forum noob so if you want my log or tune file to review just lmk how i go about posting it and ill gladly do so. thank you, matt
PS. truck runs and drives just fine and all other minor tuning tweaks have been a non-issue as long as i stay under 40% throttle.