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GM 9.5 12 Bolt Rear
    GM 9.5 12 Bolt Rear
    Purchase GM 9.5 12 Bolt Rear
    • GM 9.5 12 Bolt Rear
      Part Number 11172

    • Prototype parts in process. Scheduled for Summer 2022. Sign up for our email list so we know you are interested.

    Number of Bolts: 12 bolts

    Status: PML has designed and is making protype covers for a rear differential cover for 2019 and 2020 Silverado and Sierra 1500 trucks.

    Some 2019 trucks have this new differential and some have the same differential as the 2014 to 2018 trucks.

    The 12 bolt rear differential cover on 2014 to 2018/2019 vehicles looks similar but is slightly smaller and the area around the fill hole is slightly different. Scroll down for pictures of the stock covers.

    We have heard that the ring gear is about 9.5 and this new differential is made by GM, not American Axle (AAM).

    We are collecting information and welcome suggestions and pictures. Email info and pictures of the stock cover to:

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    Stock cover for older GM AAM 9.5, 9.76 compared to stock cover for new GM 9.5:

    GM AAM Stock 9.5, 9.76 12 Bolt Rear Differential Cover      GM 9.5 12 Bolt Rear Differential Cover
    Click on image to view larger. Area around and below fill hole is different.

    This differential is found on 2019 and 2020 Silverado and Sierra 1500 trucks. Similar SUVs and trucks may also have this differential.

    No pictures of installations yet.

    Comparing 2014 to 2018 PML Cover to 2019 Gasket

    The PML differential cover in the picture is PML differential cover for GM 9.5, 9.76 12 bolt, 2014 to 2018. The gasket is for a 2019 truck.

    2019 GM 12 Bolt Rear Differential Cover Gasket Compared to PML Cover for 2014 to 2018