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have a 2007 duramax with an edge tuner that i installed in september 2012, and the truck just started showing 2 codes in the tuner
p5062- system low voltage, which pointed at the ignition switch and u1041- loss of communication with ebcm.
i changed ignition switch and the codes go away and come back in about a week. the codes show up when i go 2 shut the truck off, it stays running an extra 20 seconds then shuts off on its own. is the tuner causing this or something else? can any1 help me?
 

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I have an Edge CS programmer but mine is gas. I believe though you can still set it back to the factory tune and take out the programmer and see if that is it. Good luck man, let us know what you find out. :glasses:
 
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