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  1. First Generation Duramax Electronics/Tuners
    I have a 2004 duramax Lb7 that the vacuum pump has been deleted and I am tired of looking at the check engine light. It came with a Diablo sport tuner So I guess I will be getting rid of that. I understand I need EFI live. I am not familiar with this at all, looks like I need autocal and EFI...
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