Looks like in 2021 Ram went back to the reliable CP3 pump. In 2017 GM replaced the problematic Bosch CP4.2 and went to the Denso CP4. I believe Ford is still using the Bosch CP4 on the current Powerstroke.
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2019 Keystone Montana 3560RL, 2020 Chevy 2500 HD, Firestone airbags, Air Lift wireless compressor, Curt gooseneck, 20K Reese Goosebox, TST-507, USMC combat vet & retired LEO. Robert, Anika, Breanna, Dylan (daughter-in-law Stephanie). & our Great Pyrenees Layla
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