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GM 9.5 12 Bolt Rear, 2019 and newer
    GM 9.5 12 Bolt Rear, 2019 and newer
    Purchase GM 9.5 12 Bolt Rear, 2019 and newer
    • GM 9.5 12 Bolt Rear, 2019 and newer
      Part Number 11172

    • For 2019 and newer GM 1/2 ton trucks, SUVs and vans such as Silverado and Sierra 1500 with a 12 bolt rear differential cover.

      Cover includes magnetic drain plug and mounting hardware. Price varies with finish. SEE PRODUCT INFO.

      $0.00

    • OPTIONAL - add machining of a 1/8 NPT hole for an aftermarket temperature sending unit:
    •  

    Volume: 0.3 quarts over stock, approximately

    Dimensions: Click here for dimensions.

    Number of Bolts: 12 bolts

    PML has designed and manufactured a rear differential covers for 2019 and newer Silverado and Sierra 1500 trucks and GM 1/2 ton SUVs and vans.

    Some 2019 trucks and SUVs have this new differential and some have the same differential as the 2014 to 2018 trucks. The 12 bolt rear differential cover on 2014 and newer vehicles looks similar but is slightly smaller and the area around the fill hole is different. See SPECIFICATIONS section for details.

    The ring gear may be 9.5 or 9.75 and this new differential is probably made by GM, not American Axle (AAM).

    Benefits

    PML designed this cover with fins, drain, and a shape similar to stock.
    PML cover features  Click on image to view larger

    This differential is found on some 2019 and newer Silverado and Sierra 1500. Similar Cadillac, Chevrolet, and GMC SUVs, trucks and vans may also have this differential.

    Always check your vehicle to verify configuration and clearance.

    For the similar GM AAM 9.5, 9.76 12 bolt rear differential cover see PML Part Number 11129. PML Part Number 11129 works with 2014 to 2018 and some newer vehicles.

    See the SPECIFICATIONS section for information on determining if your vehicle needs this cover or PML part number 11129.

    2021 Silverado 1500

    Carlos installed this PML GM rear differential cover on his 2021 Chevy Silverado 1500 6.2L.

    2021 Silverado 1500 2020 Silverado 1500   GM 12 bolt 9.5 stock rear differential on a 2021 Silverado 1500 stock differential   PML GM 12 bolt 9.5 rear diff cover on a 2021 Silverado 1500 stock differential
    Click on image to view larger.

    2020 Silverado 1500

    Damien installed this PML GM rear differential cover on his 2020 Chevy Silverado 1500 5.3L. His model is a Z71 4WD with an 8 speed 8L90 transmission. He has a lift kit and 38 inch tires and an aftermarket dual exhaust.

    Because the truck is lifted so there is less space between the differential cover and the spare tire. The dual exhaust requires the heat shield for the spare tire. He has not yet put back on the spare tire with the heat shield.

    Damien reported that the installation was straight forward and took about 1 1/2 hours and the cover looks great. Many thanks to Damien for all the pictures.

    2020 Silverado 1500 2020 Silverado 1500   stock rear differential on a 2020 Silverado 1500 stock differential   shield and spare tire spare tire and shield   draining old differential oil on a 2020 Chevy 1500 draining fluid   PML GM differential cover drain plug installing drain plug   GM factory gasket on PML differential cover checking gasket   Installing PML GM differential cover on 2020 1500 installing PML cover   tool to fill oil Damien's oil fill tube   putting oil in 2020 Silverado 1500 differential filling differential   tape on level check plug tape for a better seal on level check plug   PML rear differential cover installed on a 2020 Silverado 1500 PML differential cover installed   PML diff cover installed PML rear differential cover on 2020 Silverado 1500  
    Click on image to view larger in a new tab or window.

    Stock Cover and OEM Gasket Part Number

    This PML differential cover, part number 11172, is designed to replace this stock cover:
    GM 9.5 12 Bolt Rear Differential Cover  Click on image to view larger.

    Always check your vehicle to verify configuration and clearance for a larger, aftermarket differential cover.

    The OEM gasket part number is 84428297.

    Comparing 2014 and Newer and 2019 and Newer Stock Covers

    Area around and below fill hole is different. The bolt hole pattern and size is slightly different but it is easiest to see the difference around the fill/level check hole.

    GM 12 bolt rear differential covers compared   Click on image to view larger.

    Drain, Level Check and Optional Temperature Sending Unit Machining

    This PML cover has a drain hole on the bottom for easy servicing of differential. Fill/level check hole is on the side. Hardware is included with cover.

    If you have an aftermarket temperature sending unit and gage to monitor fluid temperatures, there is a boss that can be machined for a 1/8 NPT hole for the temperature sending unit.

    Drain, level check, boss on PML cover   drain hole on PML diff cover  Click on image to view larger.

    Inside of PML Cover

    The inside of this PML differential cover follows a shape similar to that of the stock cover:
    Inside of PML GM 9.5 12 Bolt Rear Differential Cover  Click on image to view larger.

    Included with Package with PML Differential Cover

    With the differential cover, PML includes new mounting bolts and washers, a plug for the level check hole and a magnetic drain plug with a reuseable copper sealing washer.
    PML GM 9.5 12 Bolt Rear Differential Cover with bolts, drain plug   PML cover with bolts, drain plug, black powder coat
    Click on image to view larger.