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GM 9.5 12 Bolt Rear Differential Cover

PML

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$255.00 - $320.00
GM 9.5 12 Bolt Rear Differential Cover
SKU:
PMLI-DCASMAS11172-0620
Availability:
Usually ships in 2-7 business days
Year:
2019 and up
Make:
GM / Chevrolet
Model:
Truck / SUV (See Application Chart)
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Product Overview

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.
PML cover features  Click on image to view larger

Applications:

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.

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 84412728.

GM 9.5 12 Bolt Rear Differential Cover Gasket   OEM gasket on PML GM 9.5 12 Bolt Rear Differential Cover   OEM gasket GM 9.5 12 Bolt part number label  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.

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

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.

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.

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