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GM 8 1/2", 8 5/8" " Ring Gear
10 Bolt
Differential Covers

Part Numbers
6082, 10815

PML GM 8 1/2", 8 5/8"  Diff Cover, as-cast, straight fin PML GM 8 1/2", 8 5/8"  Diff Cover, as-cast, patterned fin

As-Cast Finish
$165

PML GM 8 1/2", 8 5/8"  Diff Cover, black powder coat, straight fin PML GM 8 1/2", 8 5/8"  Diff Cover, black powder coat, patterned fin

Black powder coating
$215

PML GM 8 1/2", 8 5/8"  Diff Cover, polished, straight fin PML GM 8 1/2", 8 5/8"  Diff Cover, polished, patterned fin

Polished finish
$280

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Volume: 0.5 quart over stock, approximately

PML makes two different rear end covers for the GM 8 1/2", 8 5/8" rear end. Part Number 6082 has veritcal fins and is a little over 4 inches tall. Part Number 10815 has horizontal fins is about 2 7/8 inches tall.

Please check and order the correct mounting bolt thread diameter. These differentials were made with a variety of bolts. After clicking on the BUY NOW button, you will be able to select the bolt size for that particular cover.

These differential covers fit some 1/2 ton trucks and SUVs as well as some GM muscle cars from the 1960s.

Applications for a PML GM 10 Bolt Differential Cover

This PML differential cover fits the rear end differential on many GM, GMC, and Chevrolet vehicles. Be aware that for each model and year there may be more than one rear axle possible. See also GM 10 bolt 7.5, GM 14 bolt 9.5, and GM 12 bolt 9.5.

Typical applications for this cover include the following.

½ Ton Trucks, 1979 to Current:

  • C10 & K10
  • C1500 & K1500
  • Silverado 1500
  • Sierra 1500

¾ Ton Trucks, 1979 to 1998:

  • C20 & K20
  • C2500 & K2500

½ Ton Vans, 1979 to Current:

  • Vandura
  • Express
  • Savana
  • G1500

¾ Ton Vans, 1979 to Current:

  • Vandura
  • Express
  • Savana
  • G2500

Full Size Blazer, 1977 to 1994

GMC Jimmy, 1977 to 1991

Escalade, Tahoe, Yukon,
1992 to Current (check panhard bar clearance)

Avalanche 1500

Suburban 1500, 1982 to Current

Hummer H3

GM 8.2 10 Bolt: These rear end covers can also fit on older vehicles with the GM 8.2 differential. For example:

  • 1966 Impala
  • 1960s Chevelle
  • 1966 Pontiac GTO

See our GM 8.2 web page for more information.

GM 8.2 with PML cover
PML GM 8.5 cover and stock GM 8.2 cover

4WD Front Applications: See PML Part Number 6077 for GM Front 10 bolt 8 1/2" ring gear differential found on some 4WD Chevy and GMC SUVs and trucks. PML part number 10815 and 6082 are for the rear differentials.

Always check your vehicle to verify differential and clearance.

For a larger picture, please click one of the above images. A separate window will open showing a bigger picture. (The larger pictures take a minute to display.)

PML Differential Cover Features:

  • Increased oil capacity for cooler temperatures
  • Sand-cast aluminum with raised fins
  • 3/16-inch thick wall construction to add strength to differential housing
  • 3/8-inch thick gasket flange will not bend when bolts are tightened
  • Machined gasket surface for a secure seal using RTV or factory reusable gasket
  • Oil changes without removing the cover
  • All hardware provided, including magnetic drain plug

Learn more about finishes and construction of PML parts.