GM Differential Covers - PML - 9511AC - AAM 11" Ring Gear, 14 Bolt Differential Cover For GM Trucks -
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AAM 11" Ring Gear, 14 Bolt Differential Cover For GM Trucks

Part Number: 9511AC
 Racer Net: $245.00/Each
 Our Price: $215.95
 You Save: $29.05/Each (12%)

This differential cover fits Chevrolet Silverado and GMC Sierra 2500HD & 3500 with the Duramax or 8.1 engine, 2001 and newer.
These trucks can also use PML P/N 10361, which has a different fin pattern, less capacity and requires the brake bracket at the 12 o'clock position to be bent.

If you have a Dodge Ram with this axle, click here for our Dodge cover since this cover will not work on Dodge trucks.

PML AAM 11.5" differential cover for GM trucks is designed for:

  • 2001 and newer Sierra/Silverado 2500HD with Duramax diesel
  • 2007 Sierra/Silverado 2500HD Classic with Duramax diesel
  • 2001 to 2006 Sierra/Silverado 3500 with 8.1 V8 gas engine or Duramax diesel
  • 2007 Sierra/Silverado 3500 Classic with 8.1 V8 gas engine or Duramax diesel
  • 2007 and newer Sierra/Silverado 3500HD with Duramax diesel
  • Some 2007 and newer Sierra/Silverado 3500HD with 6.0 V8 gas engine (some have the American Axle 10.5" differential)

  • The differential cover has oil fill/level check hole and a drain hole with a magnetic plug to facilitate oil changes.

    If you have an oversized spare tire, you may need to move the tire towards the rear.
    There is tube that holds the spare tire in place and the position can be easily adjusted.

    PML Differential Cover Compared to Stock


    These images show this PML differential cover compared to the stock cover.

    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
  • Volume: 1 quart over stock, approximately

    Dimensions: Click here for dimensions. Check size, shape, number of bolts, level check hole location, axle rotation, vent if any, and clearance.

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