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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. The gaskets are different also. See APPLICATIONS and SPECIFICATIONS sections 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.
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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.
The OEM gasket part number is 84412728.
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.
2020 Silverado 1500
stock differential
stock differential
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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
stock differential
spare tire and shield
draining fluid
installing drain plug
checking gasket
installing PML cover
Damien's oil fill tube
filling differential
tape for a better seal on level check plug
PML differential cover installed
PML rear differential cover on 2020 Silverado 1500
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Stock Cover and OEM Gasket Part Number
This PML differential cover, part number 11172, is designed to replace this stock cover:
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Always check your vehicle to verify configuration and clearance for a larger, aftermarket differential cover.
The OEM gasket part number is 84412728.
Click on image to view larger.
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.
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To figure out which you have, try checking the OEM gasket part number or visually comparing your cover to the picture above.
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.
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Inside of PML Cover
The inside of this PML differential cover follows a shape similar to that of the stock cover:
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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.
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