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    1. TSBs

    Stopping Chevy Transmission Leak

    Aug. 19, 2024
    This bulletin applies to 2020-2024 Chevy Silverado 2500HD/3500HD trucks equipped with an L5P or L8T engine and MGM, MGU or MKM transmission.
    Related To: Mitchell 1
    Photo courtesy of Chevrolet
    According to GM, if the leak has been verified to be coming from the front cover seal, replace the automatic transmission case front cover seal P/N 24277112 and the torque converter fluid seal P/N 24293986.
    According to GM, if the leak has been verified to be coming from the front cover seal, replace the automatic transmission case front cover seal P/N 24277112 and the torque converter fluid seal P/N 24293986.

    This bulletin applies to 2020-2024 Chevy Silverado 2500HD/3500HD trucks equipped with an L5P or L8T engine and MGM, MGU or MKM transmission.

    You may find transmission fluid leaking from the bellhousing inspection cover. This condition may be caused by the automatic transmission case front cover seal being rolled or damaged.

    According to GM, if the leak has been verified to be coming from the front cover seal, replace the automatic transmission case front cover seal P/N 24277112 and the torque converter fluid seal P/N 24293986.

    About the Author

    Motor Age Staff

    Motor Age has been publishing technical content for professional automotive technicians since 1899. Our writers have decades of experience and scores of ASE certifications, and they continue to teach new generations of technicians via classrooms all around the globe, as well as through the books and training manuals they've authored. 

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