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  1. Duramax Second Generation: 2004.5-2005 (LLY)
    05 Duramax lly was wondering if any can tell me how to check the CP3 pump. I purchased a gauge and a repair manual.. in the manual it says hook up the gauge.. pump the primer to 10 pounds psi and if within one minute it leaks down to 2 psi then unhook the supply line from filter body/ primer...
  2. Duramax Second Generation: 2004.5-2005 (LLY)
    Hello, I have a 2004 Duramax LLY with about 175000 miles. I have a fuel leak running off the back of the engine. When I look at the top of the engine, I can see fuel pooling in the valley. No fuel is spraying anywhere, just a decent drip so I am thinking its the return system. I am pretty sure...
  3. Duramax Second Generation: 2004.5-2005 (LLY)
    Gentlemen, 2004.5 LLY crank no start. New batteries on trickle charger, new fuel filters, with Kennedy lift pump. No rub anywhere on wiring. It had a Po193 code and I’m-thinking a leaky injector… Fuel primer very hard cranks but clatters and dies, won’t run. I’ve got an injector return test...
  4. Medium Duty Trucks
    I have a 2005 Kodiak C5500 with a Duramax. Drove it about 200 yards and it died. I could get it to restart if I continuously pumped the primer on top of the stock fuel filter. Got it home and made the following "fixes". New Fuel Filter. I have two DuraMax trucks so I have a lot of...
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