[Cbrowne]

No fix as of yet, my local garage tested my pedals and my pinouts and found the pedals to be faulty, to which I tested them myself and they all tested no issues at all. I've even tested supply and feedback voltages at the pedal with a digital voltmeter which measured no issues. I ordered another off-brand GM pedal which once again I've tested as working but still have P2138. I have found by resetting my ECM (disconnecting battery) the car acts right for up to about 30-45 minutes before going back into fault when hard accelerating. Graphing the data D/E voltages on the pedals it shows they're working absolutely fine so I can only guess the formula to calculate P2138 has corrupted in some kind of way. I'm now killing the car over night to see if it can completely reset the ECM before I go to the local tuner and see if they can program P2138 out of the car. And for reference 4 OBDII scanners have all proven the only fault is a P2138 D/E voltage correlation.