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  1. L5P TSB (service bulletins, recalls, updates)
    So I bought a used 2017 Chevy HC 6.6L Duramax a few months ago in Oct. Truck has ran great with no issues until about 3wk ago and I noticed a few times that my truck would almost "jump" into gear. I just drove my truck from Texas to Oregon and now the truck is having more issues. More...
  2. 04.5-05 LLY Duramax Powertrain
    Hello, I have a 2005 lly duramax. I recently did head gaskets and studs on it. In the process I put new injectors hard fuel lines , return lines, intake,up pipe, y bridge. Air dog 150 and cp3 pump now currently I am having a problem where when I accelerate hard in lower gears it pops and there...
  3. 11-16 LML Duramax Powertrain
    The other night my truck got stuck in park. The shifter would not budge at all. Replaced the brake position sensor. As well as the transmission shift interlock solenoid. Now the truck shifts, but its shifting without pressing the brake pedal at all. Anyone have any insight to this?
  4. Transmission Shop
    Hi All, I have a 2005 gmc crew cab LLY with the 5 speed. I have been noticing that when under moderate acceleration, it shifts funny between 3-4 gear. It begins the shift and during mid-shift it is like it goes into neutral. The revs pick up to about 3k at moderate acceleration, then it shifts...
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