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.

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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