No, the Duramax diesels have not used Bosch CP4 pumps since 2016. Starting with the 2017 model year, the Duramax has used Denso HP4 pump and Denso injectors. A far better unit than the Bosch.
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2016 Montana High Country 310RE
2020 Chevrolet Silverado 3500 HD LT CC 4x4 Duramax
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