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Yea, threw me right off. I unplugged the pedal with keyon, plug back in and performed pedal calibration and it worked like a charm.

Solved it

Calibrated ECM to most current update and now I have no fuel pedal...tried to do key on pedal down 3 times slowly but no luck...truck has to be back to customer tonight and I'm a little baffled here..

I got to look into that recall, happen to have a link relating to it?

Hey, I ended up flashing the ECM with the most current update and she's all good now. I work on these often and haven't came across this, good learning experience. Thanks for the info.

Hey, I'm working on a 2013 Peterbilt 379 with Cummins isl9 in it. Def gauge is at 99% but led on the gauge is flashing. This has caused the truck to go into a derate, only codes present are derate codes. I suspected a fualty def level sensor so I replaced it...did nothing for me, I can...

Glad I could help, retrace all the connection you messed with, possible u left something unplugged or not plugged in all the way, have it scanned to help you look.

How did it go?

Assuming you have air brakes, Check the service air brake vavle switch at the rear axle. 2 wire harness going to the switch. Look for corroded wire or damaged pins. If the wires and pins are ok then unplug the switch, jump the two pins and go for a ride. Had a customer with those same symptoms...

Hey, looking to see if anyone has access to a wiring diagram for a 07 GMC t7500. Having a hard time getting info on this truck. At s point where a diagram would move things along quicker. Thanks.

Sounds like it needs to be plugged in to Allison doc, if you get a code I could help alot more. Certain codes will activate range inhibitor and lock the Gear the fault was set in. What sensors were changed and why? I'm assuming nothing internal

Anything can be used still, just be prepared to dish out some cash for repairs, buying at 375 give you plenty of room to spend on repairing it. 2006 should not have dpf, so you have that going for you. Worst case sonario you scrap it and get your 375 back