R1Moon

I've got a 95 GMC that I've put 2003 5.3 in it and I'm on my 4th PCM and have used 8 HP credits. I keep getting P0606 code and it wont clear until I put another PCM in it. I also can no longer write to it with the HP Tuner. along with the P0606 I've also gotten: P0120-Throttle/Pedal Position Sensor A Circuit, P0220-Throttle/Pedal Position Sensor/Switch B Circuit, P0452-Evaporative Emission System Pressure Sensor/Switch Low, P2135 and U0107-Lost Communication with Throttle Actuator Control Module. At a major loss and running out of money. Thanks for any help!

33willys

iTrader: (1)

I can only talk to the U0107 code. I had that and found it to be a mismatch between the program and my throttle peddle. Engine is an '03 and used all '03 equipment (APP and TAC) but discovered the program was updated to an '05 program which caused a U0107 code. Updated my peddle and all was well.

67Skylark

I had a hell of a time with P0606. I was never able to figure it out, Jon of PSI (jvezzosi@psiconversion.com) was the answer, purchase a PCM and have him put a base tune that matches your setup and go from there. Sorry, not a cheaper answer.

brandon6.0

iTrader: (32)

is the tac and pedal from the same vehicle as the engine harness? u make it standalone yourself or purchased one pre built? what ecu?

R1Moon

The TAC and pedal are not from the same truck as the harness and I built the harness from a salvage yard harness. And the ECUs have been from 2003-2005 trucks, green and blue. Thanks for the help guys!