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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 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.
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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:
Click on image to view larger.
Pictures of stock cover on 2015 Silverado 2500HD diesel double cab:
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.
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.
Click on image to view larger.
