Duramax Second Generation: 2004.5-2005 (LLY)
Ok so I have a 2005 duramax straight piped 5 position efi live and fass fuel system. Today my truck seemed like it had no power at first then comes back when I give it more throttle. When I’m going down the interstate it seems fine but falls flat when I call on it. When in neutral it revs up...