-20%
aFe Power Pro Series AAM 9.5/9.76 Rear Diff Cover Black w/Mach Fins 14-19 GM Silverado/Sierra 1500 aFe AFE46-71120B
aFe Power Pro Series AAM 9.5/9.76 Rear Diff Cover Black w/Mach Fins 14-19 GM Silverado/Sierra 1500 aFe AFE46-71120B
aFe Power Pro Series AAM 9.5/9.76 Rear Diff Cover Black w/Mach Fins 14-19 GM Silverado/Sierra 1500 aFe AFE46-71120B
aFe Power Pro Series AAM 9.5/9.76 Rear Diff Cover Black w/Mach Fins 14-19 GM Silverado/Sierra 1500 aFe AFE46-71120B
aFe Power Pro Series AAM 9.5/9.76 Rear Diff Cover Black w/Mach Fins 14-19 GM Silverado/Sierra 1500 aFe AFE46-71120B
aFe Power Pro Series AAM 9.5/9.76 Rear Diff Cover Black w/Mach Fins 14-19 GM Silverado/Sierra 1500 aFe AFE46-71120B
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aFe Pro GM AAM 9.5/9.76 Rear Diff Cover - Black

$ 442.50 $ 354.00
$ 354.00

Axle-specific differential protection

The aFe 46-71120B Pro Series black rear cover fits the specified AAM 9.5 / 9.76 - 12 bolt differential.

Key Features

  • Cast aluminum with reinforcing ribs, cooling fins, black powder-coating and machined fin surfaces.
  • 3/4-inch npt magnetic fill plug with a 6-inch reach, a 1-inch npt sight glass, m12 x 1.25 magnetic drain plug with crush washer, and 1/8-inch npt calibration plug.
  • Calibration opening supports checking the correct oil level.
  • Manufacturer states this cover does not require a CARB EO number.

Fitment

Years Make Model Trim / required axle
2015-2018 Chevrolet Silverado 1500 LS; AAM 9.5 / 9.76 - 12 bolt
2014-2023 Chevrolet Silverado 1500 LT; AAM 9.5 / 9.76 - 12 bolt
2019-2023 Chevrolet Silverado 1500 LT Trail Boss; AAM 9.5 / 9.76 - 12 bolt
2014-2023 Chevrolet Silverado 1500 LTZ; AAM 9.5 / 9.76 - 12 bolt
2023 Chevrolet Silverado 1500 PPV; AAM 9.5 / 9.76 - 12 bolt
2019-2023 Chevrolet Silverado 1500 RST; AAM 9.5 / 9.76 - 12 bolt
2015-2020 Cadillac Escalade Base; AAM 9.5 / 9.76 - 12 bolt
2015-2020 Cadillac Escalade Luxury; AAM 9.5 / 9.76 - 12 bolt
2015-2020 Cadillac Escalade Platinum; AAM 9.5 / 9.76 - 12 bolt
2015-2016 Cadillac Escalade Premium; AAM 9.5 / 9.76 - 12 bolt
2017-2020 Cadillac Escalade Premium Luxury; AAM 9.5 / 9.76 - 12 bolt
2015-2021 Chevrolet Silverado 1500 SSV; AAM 9.5 / 9.76 - 12 bolt
2014-2023 Chevrolet Silverado 1500 WT; AAM 9.5 / 9.76 - 12 bolt
2022-2023 Chevrolet Silverado 1500 ZR2; AAM 9.5 / 9.76 - 12 bolt
2019 Chevrolet Silverado 1500 LD Custom; AAM 9.5 / 9.76 - 12 bolt
2019 Chevrolet Silverado 1500 LD LT; AAM 9.5 / 9.76 - 12 bolt
2019 Chevrolet Silverado 1500 LD WT; AAM 9.5 / 9.76 - 12 bolt
2015-2020 GMC Yukon SLE; AAM 9.5 / 9.76 - 12 bolt
2015-2020 GMC Yukon SLT; AAM 9.5 / 9.76 - 12 bolt
2015-2020 GMC Yukon XL Denali; AAM 9.5 / 9.76 - 12 bolt
2015-2020 GMC Yukon XL SLE; AAM 9.5 / 9.76 - 12 bolt
2015-2020 GMC Yukon XL SLT; AAM 9.5 / 9.76 - 12 bolt
2016-2023 Chevrolet Silverado 1500 Custom; AAM 9.5 / 9.76 - 12 bolt
2019-2023 Chevrolet Silverado 1500 Custom Trail Boss; AAM 9.5 / 9.76 - 12 bolt
2014-2023 Chevrolet Silverado 1500 High Country; AAM 9.5 / 9.76 - 12 bolt
2015-2020 Chevrolet Suburban LS; AAM 9.5 / 9.76 - 12 bolt
2015-2020 Chevrolet Suburban LT; AAM 9.5 / 9.76 - 12 bolt
2015-2016 Chevrolet Suburban LTZ; AAM 9.5 / 9.76 - 12 bolt
2017-2020 Chevrolet Suburban Premier; AAM 9.5 / 9.76 - 12 bolt
2019-2023 GMC Sierra 1500 AT4; AAM 9.5 / 9.76 - 12 bolt
2022-2023 GMC Sierra 1500 AT4X; AAM 9.5 / 9.76 - 12 bolt
2014-2021 GMC Sierra 1500 Base; AAM 9.5 / 9.76 - 12 bolt
2014-2023 GMC Sierra 1500 Denali; AAM 9.5 / 9.76 - 12 bolt
2022-2023 GMC Sierra 1500 Denali Ultimate; AAM 9.5 / 9.76 - 12 bolt
2019-2023 GMC Sierra 1500 Elevation; AAM 9.5 / 9.76 - 12 bolt
2022-2023 GMC Sierra 1500 Pro; AAM 9.5 / 9.76 - 12 bolt
2014-2023 GMC Sierra 1500 SLE; AAM 9.5 / 9.76 - 12 bolt
2014-2023 GMC Sierra 1500 SLT; AAM 9.5 / 9.76 - 12 bolt
2019 GMC Sierra 1500 Limited Base; AAM 9.5 / 9.76 - 12 bolt
2019 GMC Sierra 1500 Limited SLE; AAM 9.5 / 9.76 - 12 bolt
2015-2020 GMC Yukon Denali; AAM 9.5 / 9.76 - 12 bolt

46-71120B: The current manufacturer listing covers 2014-2023 Silverado/Sierra 1500 with an AAM 9.5/9.76 rear axle. The linked older manual heads 2014-2020 GM 1500 4.3L V6/5.3L/6.2L V8 and explicitly names 2015-2020 Tahoe/Yukon, Suburban/Yukon XL 5.3L/6.2L and Escalade 6.2L. Existing pickup ranges and gaps are retained. Some exact-part retailer listings extend SUV coverage into 2021 or later, conflicting with GM bulletins 20-NA-137 and 20-NA-211, which document the 2021 change from a solid axle to an independent-suspension rear drive module. Later SUV rows are withheld as a source conflict, not a physical interchange test. Earlier supported SUV rows remain; verify actual housing and boxed revision.

Specifications

Detail Value
Manufacturer Part Number 46-71120B
Position / axle Rear / AAM 9.5 / 9.76 - 12 bolt
Finish Black powder-coating with machined fins
Fill and sight glass 3/4-inch NPT magnetic fill plug with a 6-inch reach, a 1-inch NPT sight glass, M12 x 1.25 magnetic drain plug with crush washer, and 1/8-inch NPT calibration plug
Oil level Fill until oil flows from the side 1/8-inch calibration opening, about 3.5 quarts in the illustrated GM installation. Verify the proper level separately on a lifted vehicle with a rotated axle; use the actual axle lubricant and additive specification.
Tightening Tighten GM mounting screws to 12-16 ft-lb in a crisscross pattern. On applicable coil-spring vehicles, restore the driver-side track-bar bolt, washer and flag nut with the vehicle on the ground in a static position, and tighten that track-bar bolt to 63 ft-lb. The exact manual does not give a numerical M12 drain-plug torque or NPT turn count. Do not substitute a value from another cover.

What's Included

  • One black Pro Series cast-aluminum cover with machined fins, twelve M8 x 1.25 x 25 screws, one M8 x 1.25 x 40 screw, twelve flat washers, one spacer, and the 3/4-inch NPT magnetic fill plug with a 6-inch reach, a 1-inch NPT sight glass, M12 x 1.25 magnetic drain plug with crush washer, and 1/8-inch NPT calibration plug. The longer screw replaces a short screw at the applicable right upper brake-line bracket; it is not a thirteenth mounting position.
  • Gear oil, axle additive, filter, coupler and tools are not established as included. The GM manual reuses the original OEM gasket. Carefully remove and inspect it; a new gasket or RTV is not established in this bill of materials.

Related Parts

Explore aFe Power drivetrain parts. Select covers by actual axle identification.

Frequently Asked Questions

What is the 46-71120B?

Black Pro Series cast-aluminum rear cover for the specified AAM 9.5 / 9.76 - 12 bolt axle.

Which applications and axle must be checked?

The current manufacturer listing covers 2014-2023 Silverado/Sierra 1500 with an AAM 9.5/9.76 rear axle. The linked older manual heads 2014-2020 GM 1500 4.3L V6/5.3L/6.2L V8 and explicitly names 2015-2020 Tahoe/Yukon, Suburban/Yukon XL 5.3L/6.2L and Escalade 6.2L. Existing pickup ranges and gaps are retained. Some exact-part retailer listings extend SUV coverage into 2021 or later, conflicting with GM bulletins 20-NA-137 and 20-NA-211, which document the 2021 change from a solid axle to an independent-suspension rear drive module. Later SUV rows are withheld as a source conflict, not a physical interchange test. Earlier supported SUV rows remain; verify actual housing and boxed revision.

Which plugs and sight glass are included?

3/4-inch npt magnetic fill plug with a 6-inch reach, a 1-inch npt sight glass, m12 x 1.25 magnetic drain plug with crush washer, and 1/8-inch npt calibration plug. The black GM cover includes a pre-installed sight glass. The separate plain 1-inch plug installation step is for the raw A version, not this black B cover.

Which mounting hardware is supplied?

One black Pro Series cast-aluminum cover with machined fins, twelve M8 x 1.25 x 25 screws, one M8 x 1.25 x 40 screw, twelve flat washers, one spacer, and the 3/4-inch NPT magnetic fill plug with a 6-inch reach, a 1-inch NPT sight glass, M12 x 1.25 magnetic drain plug with crush washer, and 1/8-inch NPT calibration plug. The longer screw replaces a short screw at the applicable right upper brake-line bracket; it is not a thirteenth mounting position.

Does the cover include a gasket and gear oil?

Gear oil, axle additive, filter, coupler and tools are not established as included. The GM manual reuses the original OEM gasket. Carefully remove and inspect it; a new gasket or RTV is not established in this bill of materials.

How is the oil level set?

Fill until oil flows from the side 1/8-inch calibration opening, about 3.5 quarts in the illustrated GM installation. Verify the proper level separately on a lifted vehicle with a rotated axle; use the actual axle lubricant and additive specification.

Which tightening values apply?

Tighten GM mounting screws to 12-16 ft-lb in a crisscross pattern. On applicable coil-spring vehicles, restore the driver-side track-bar bolt, washer and flag nut with the vehicle on the ground in a static position, and tighten that track-bar bolt to 63 ft-lb. The exact manual does not give a numerical M12 drain-plug torque or NPT turn count. Do not substitute a value from another cover.

What access and installation steps matter?

Block the tires on a flat dry surface and position a drain pan. Retain the upper cover bolt while loosening the cover to drain, then remove the cover. Preserve the gasket where required and clean the housing without gouging or rounding its sealing face. The GM manual reuses the original OEM gasket. Carefully remove and inspect it; a new gasket or RTV is not established in this bill of materials. For coil-spring vehicles only, remove the driver-side track-bar bolt, washer and flag nut on the ground in a static position, then move the bar upward for access. Locate the cover with the OEM gasket and two short screws/washers. Where fitted, restore the left upper brake-line bracket with a short screw/washer and the right upper bracket with the long screw, spacer and washer. Restore the track bar on the ground after filling; its 63 ft-lb value is separate from the cover mounting value. Install the drain plug and crush washer, fit the sight glass as applicable, fill by the calibration opening and seal the pipe plugs as directed. Inspect clearance and leaks.

Installation Instructions

Read the current manufacturer listing for 46-71120B and full exact-family installation manual.

Block the tires on a flat dry surface and position a drain pan. Retain the upper cover bolt while loosening the cover to drain, then remove the cover. Preserve the gasket where required and clean the housing without gouging or rounding its sealing face. The GM manual reuses the original OEM gasket. Carefully remove and inspect it; a new gasket or RTV is not established in this bill of materials. For coil-spring vehicles only, remove the driver-side track-bar bolt, washer and flag nut on the ground in a static position, then move the bar upward for access. Locate the cover with the OEM gasket and two short screws/washers. Where fitted, restore the left upper brake-line bracket with a short screw/washer and the right upper bracket with the long screw, spacer and washer. Restore the track bar on the ground after filling; its 63 ft-lb value is separate from the cover mounting value. Install the drain plug and crush washer, fit the sight glass as applicable, fill by the calibration opening and seal the pipe plugs as directed. Inspect clearance and leaks.

Tighten GM mounting screws to 12-16 ft-lb in a crisscross pattern. On applicable coil-spring vehicles, restore the driver-side track-bar bolt, washer and flag nut with the vehicle on the ground in a static position, and tighten that track-bar bolt to 63 ft-lb. The exact manual does not give a numerical M12 drain-plug torque or NPT turn count. Do not substitute a value from another cover.

Fill until oil flows from the side 1/8-inch calibration opening, about 3.5 quarts in the illustrated GM installation. Verify the proper level separately on a lifted vehicle with a rotated axle; use the actual axle lubricant and additive specification.

46-71120B: The black GM cover includes a pre-installed sight glass. The separate plain 1-inch plug installation step is for the raw A version, not this black B cover.

California Proposition 65 Warning

  • California Proposition 65 warning: this product can expose you to chemicals known to the State of California to cause cancer and reproductive harm.
  • This product can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov.
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