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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..

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...

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.