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  1. J

    CP4 to CP-ISB21S3 (revised CP3) change for 2021 6.7L Diesel Trucks -- Merged Threads

    Hard to believe of course. But with my truck sitting idle in a shop 700 miles away from home proves to me it could be possible. I only post my experience for those that are legitimately trying to this get this issue known so there could be a resolution found. I love the truck. It was performing...
  2. J

    CP4 to CP-ISB21S3 (revised CP3) change for 2021 6.7L Diesel Trucks -- Merged Threads

    Not to frighten you any more but I have a 2020 3500 that threw a rod on flat ground without any warning. It has 33,000 miles and had 5,000 miles on the oil change with 74% life. I was told by a fellow driver the same happened to his friends ram at 20,000 miles. He called him and he was then told...
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