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  1. Duramax First Generation: 2001-2004 (LB7)
    Have change ny fuel presure regulator on fuel pump and now the engine wont start eny one have a god idea LB7 engine thanks in advance Jorn Hansen
  2. Duramax First Generation: 2001-2004 (LB7)
    Ok. So here is my story so far, and my take on all the problems occurring with LB7 Duramax engines and the P0093 code. 2 years ago (2001 Sierra 2500HD) had fuel in the crankcase. Injectors replaced by dealer. Truck ran great after replacement. A year ago, while towing my 14000 lb 5th wheel, went...
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