11173-B | PML Covers AAM GM/Allison Trucks 11.5/11.8 14 Bolt Differential Cover For Chevrolet Silverado 2500 & 3500 / GMC Sierra 2500 & 3500 | Black Powder Coated

For 2020 and newer GMC Sierra and Chevy Silverado Allison 2500HD and 3500HD, including L5P 6.6L diesels. Ring gear may be 11.5 or 11.8 or 12 inches. Cover includes magnetic drain plug and mounting hardware.

Volume: 

about 0.5 quarts over 2020 stock GM truck cover

Number of Bolts: 

14

2020 and newer GMC/Chevy heavy duty trucks have a new version of the American Axle Manufacturing (AAM) 14 bolt differential. The ring gear may be 12 inches or 11.8 or 11.5.

This new American Axle differential has a cover very similar in shape and bolt hole pattern to the cover on 2001 to 2019 trucks. But the covers and gaskets are not the same and not interchangeable.

Benefits

• Drain and magnetic drain plug included
• Heavy duty, sand cast aluminum
• Finned for heat dissipation
• Works with brake line bracket, no modification needed
• About 3/8 inches deeper than stock for clearance to sway or pan hard bars
• Shape similar to stock cover
• Extra capacity

GM vehicles that probably have these new differentials:

• 2020 GMC Sierra 2500 and 3500 trucks
• 2020 Chevrolet Silverado 2500 and 3500 trucks

Configurations vary. Always check your vehicle to verify differential and clearance.

The GM gasket part number for this differential is 68454491AA.

This includes trucks with the Allison transmission.

For 2019 and older trucks with the AAM 11.5, 11.8 differential, see PML part number 9511.

Included with PML Differential Cover

With each cover, PML includes new mounting bolts with washers, plugs for fill and level check holes, and a magnetic drain plug with sealing washer.