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Discussion Starter · #1 ·
Hey guys just bought a 2005 lly as a second truck that's about to start a new life as a hot street/weekend puller. It came with a bullydog power pup loaded up and I cannot get it to return to stock. When I plug it in it just shows it's loaded on performance and no buttons work on it to even navigate it back to stock it's just frozen. Am I doing something wrong or should I have Chevy reflash it so I can get efi loaded up. Thanks for the input new to the Duramax game.


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I would just get the dealership to re-flash it. It's easier and Bullydog is crap anyway, you should just run it over when you go to the dealership! :neener
 

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Check the power to the OBD port-- it is the same as the cigarette lighter. Possible blown fuse.
 

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^ that would make the unit not power up. sounds like his keypad took a crap. if you know anyone with a triple dog or power pup you could easily swap keypads

EFI will also write over the bullydog, just flash a stock file with EFI then put your tunes on or just have dealer flash it with tech 2
 
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