Anyone have any experience with this CEL? I own an 08' GXP, just bought an overkill tune and I've been throwing this code. I had it reset by doing an idle relearn but it comes back when I go WOT. GM said the actual vs predicted positions were off by 13% at WOT before they did the idle relearn.
Here is the info I pulled on this code:
"The commanded throttle position, based on accelerator pedal position and possibly other limiting factors, is compared to the Actual throttle position. The 2 values should be within a calibrated range of each other. Both the PCM and the TAC module redundantly monitor the Commanded and Actual throttle position. This DTC sets if the TAC module detects the problem."