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  1. 6.5L Diesel Engine
    Ill try and keep it short as most will be covered in checklist but basically have a 3500hd that would surge at highway speeds when throttle was released all the way and smoked excessively under load or heavy acceleration. Other than that had no problems aside from an oil leak from oil pan and...
  2. 6.5L Diesel Engine
    1994 GMC k3500 6.5l turbo diesel runs rough at idle almost like a lope tune idle and blow tons of black smoke. Has new PMD, injection pump and verified timing was correct.
  3. Duramax First Generation: 2001-2004 (LB7)
    The truck is an 03 Silverado 2500hd 6.6 duramax with the 5 speed Allison transmission. I don't know the mileage because the instrument cluster was changed before the guy I bought it from bought it(so he says). When I really tromp on the pedal the smoke turns black which it's supposed to I think...
  4. 6.5L Diesel Engine
    I have recently developed a problem where it feels like the engine is misfiring when I am trying to maintain a constant speed. The engine idles perfectly fine. Starts perfectly fine. And accelerates well under full throttle.It does smell like it’s running rich. I recently replaced an injection...
  5. Duramax Fourth Generation: 2007.5-2010 (LMM)
    Current known Issues 1)Black smoke coming out of Tail pipe 2) Using Edge CTS3 im not getting a reading for one of my injector rates (bottom right on the cluster) 3) Terrible throttle response 4) bad gas Milage 5) randomly getting a low oil pressure warning Im going to go ahead and guess...
  6. 6.2L Diesel Engine
    1982 Suburban, NA two weeks ago took it on a roughly 100 mile round trip excursion to get everything churned and assess any issues before I take it on a slightly longer trip with a small load (old camper weighing in at about 2200) We pulled the camper out of storage with it and the engine...
  7. Duramax First Generation: 2001-2004 (LB7)
    Having an issue with my 03 LB7. Replaced injectors 2500 miles ago. Trucks been running great until I hooked onto the two car enclosed trailer and drove 30 miles north to race. On the return trip I looked back and could no longer see the trailer or any vehicles behind me. I slowed down and got...
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