Checking for Missing Chevy Retaining Bolt

    Nov. 8, 2023
    This bulletin applies to 2016-2018 Chevy Silverado vehicles equipped with an 8L45 or 8L90 transmission. You may encounter no vehicle movement after a valve body replacement.
    Mitchell 1
    Valve body plug (1) and retaining bolt (2) locations.
    Valve body plug (1) and retaining bolt (2) locations.

    This bulletin applies to 2016-2018 Chevy Silverado vehicles equipped with an 8L45 or 8L90 transmission. You may encounter no vehicle movement after a valve body replacement. This may be caused by a plug and retaining bolt missing on the valve body. Inspect for the plug (see one in photo) and retaining bolt (2). The plug and retaining bolt are packaged as a kit.

    The kit P/N is WPC 853 and can be obtained from the Warranty Parts Center (WPC) using the TSP Dealer Request Form. This form is located on “Global Connect

    About the Author

    Information courtesy of Mitchell 1

    Information for Technical Service Bulletins comes from ProDemand, Mitchell 1's auto repair information software for domestic and import vehicles. Headquartered in San Diego, Mitchell 1 has provided quality repair information solutions to the automotive industry since 1918.

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