Hey Guys, I'm new at this...so bare with me as I learn. I have a 2007 1 ton Dually that has 18,000 miles. Everytime I hook to the fifth wheel, I get the P0401 code. When I first got the warning light (check engine) I pulled into GM. they looked at it and told me the EGR timing was off and they reset and cleared the light. I made it about a 100 miles, and guess what... here it is again... To make a long story shorter, this continues to be an issue. I bought a Diablosport Predator and installed 4" exhaust. None of this helped the situation. Of course, All GM will do is keep resetting the Code. I just found this web site yesterday, and was wondering if the EGR Plate, might help my situation. I have worked with gas engines all my life... so this is new adventure for me. Any ideas would be appreciated.
