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  1. Duramax Sixth Generation: 2017-2019 (L5P)
    I bought a used 2018 2500HD Duramax L5P and a week after owning got a reduced engine power warning and got it scanned and received the P0191 code and took it back to the dealership to address. Got some grief but they supposedly replaced the LH Fuel Rail & Pressure Sensor after 3 days in the...
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