TSBs

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.

Information courtesy of Mitchell 1

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

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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.