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2011-2024 Duramax 2500/3500HD Front Differential Cover - PPE

2011-2024 Duramax 2500/3500HD Front Differential Cover - PPE

Help keep your 2011-current GM’s front differential running cool and clean with an upgraded differential cover from PPE. With the largest set of cast cooling fins in the industry, found both inside as well as outside the pan, PPE’s differential covers offer fluid cooling capabilities not often matched. This pan also holds an extra three-quarter quart of fluid, offering a bit of added stamina on those long hauls.

To keep the fluid clean, PPE installed its exclusive high-powered Neodymium magnet-equipped fill plug will pull harmful ferrous metal particles right out of the oil before they have a chance to attack the bearings.


Factory Part Numbers: 20768577 & 84756922.



  • High-grade A356.0-T6 heat treated cast aluminum alloy
  • Stainless steel Neodymium-magnet-equipped fill plug
  • 1/8 inch stainless temperature probe plug
  • Retains use of original high-quality gasket
  • Adds additional strength to gear housing
  • Cast from high-grade aluminum alloy
  • 1/4 inch external cooling fins
  • Zinc-plated fasteners
  • 5/8 inch internal fins
  • 3/4 quart additional fluid capacity
  • Limited lifetime warranty
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