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  1. Duramax Second Generation: 2004.5-2005 (LLY)
    new to this form and duramax’s lol but i recently bought one in tractor mode and have been going through all the ice picking and replacing pig tails and checking the ficm bracket by the alternator and a couple other spots i’ve seen through these forums but the weird part about it is i have no...
  2. Duramax Second Generation: 2004.5-2005 (LLY)
    Hello, looking for suggestions here. Over a month ago my stock LLY went into the classic “tractor mode” throwing codes P2149, P0202, PO203, PO205, PO208. My first move was to replace injector harness #2 with the AC Delco replacement. This got the truck up and running instantly. Daily drove it...
  3. Duramax Second Generation: 2004.5-2005 (LLY)
    Ok guys I need some help. Working on my buddies 2005 lly 3500, it all started with the truck not holding prime, rebuilt the fuel filter head, new filter. That corrected the prime issue for about 2 days. I then drove the truck to st. Pete Florida and parked at a friends house, truck lost prime...
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