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GM Front For 2500 and 3500 HD Trucks
    GM Front For 2500 and 3500 HD Trucks
    Purchase GM Front For 2500 and 3500 HD Trucks
    • GM Front For 2500 and 3500 HD Trucks
      Part Number 11120

    • Front differential cover for 2011 and newer GMC/Chevrolet 2500HD, 3500HD trucks. Prototype parts in process. Please sign up for mailing list below so we know people are interested.

    Status: PML is working on a front differential cover for 2011 and newer Silverado and Sierra 2500HD and 3500HD trucks. Computer model is finished. Next we will make prototype parts, which is about a 4 month long process. Check back October 2025.

    PML front differential cover, computer model PML computer model of new front differential cover for GM HD trucks/SUVs   Click on image to view larger.

    The shape of the PML cover is similar to the OEM color to avoid clearance issues. Cooling fins on the bottom help with dissipating heat from the fluid. Drain on the bottom for easy fluid changes and a magnetic drain plug is included.

    Volume: 1/2 quart over stock

    Dimensions: Click here for dimensions.

    Number of Bolts: 14 holes, 12 large holes for bolts, 2 small holes for brackets/clips for cables

    Ring gear is 9.25 or 9.5. AC Delco part numbers:

    • Part Number 84756922 for 2020 and newer trucks
    • Part Number 20768577 for 2011 to 2019 trucks

    The OEM factory covers look the same.

    Mailing List Sign Up

    Let us know you are interested in this cover by signing up for our mailing list. We email only two or three times a year and never sell or share information

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    Stock Covers

    There are two part numbers for the front stock cover. Part Number 20768577 and 84756922. Covers look the same.

    Pictures of stock cover part number 84756922, outside, inside and box with part number:
    GM HD stock front differential cover   GM HD stock front differential cover, inside   GM HD stock front differential cover, part number
    Click on image to view larger.

    Pictures of stock cover on 2015 Silverado 2500HD diesel double cab:
    GM front differential cover on 2015 Silverado 2500HD diesel truck   GM front differential cover on 2015 Silverado 2500HD diesel truck, side view
    Click on image to view larger.

    Pictures of stock cover on 2022 Silverado 2500HD 4x4 gas engine truck. Skid plate under front axle is not standard.
    GM front differential cover on 2022 Silverado 2500HD gas truck, with skid plate   GM front differential cover on 2022 Silverado 2500HD gas truck, front view
    Click on image to view larger.

    Picture of shield and stock cover on 2022 Silverado 2500HD, not a Z71. Splash shield protecting the steering is standard. Shield does not protect differential cover.
    GM front differential cover, 2022 Silverado 2500HD, not Z71, shield covers steering  Click on image to view larger.



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