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  1. R

    2000 7.4L Vortec K3500 turns over but won’t start

    My 2000 7.4L Vortec K3500 won’t start. It has 96,555 total miles on it. I replaced the engine 2 years ago with an ATK remanufactured long block and I’ve only put 2000 miles on it since then. I also replaced the complete distributor (including cap, rotor, cam sensor, etc.), spark plugs, and...
  2. R

    4L80e doesn't downshift sometimes

    I have a 2000 7.4L K3500 with a 4L80e transmission. Sometimes when I'm hauling a heavy load (truck camper) up a grade the truck won't downshift into a lower gear even if I move the gearshift lever to a lower position. The engine temperature may be a little above the middle mark on the gauge...
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