PPE 138041010 Heavy Duty Cast Aluminum Front Differential Cover with Brushed Finish | 2011-2025 GM Silverado/Sierra 2500HD/3500HD

Features:

• High-strength A356-T6 cast aluminum construction
• Massive internal and external cooling fins
• Adds 3/4 quart of fluid capacity
• Neodymium magnetic fill plug traps metal
• 1/8" port for temp sensor compatibility
• Retains factory-style reusable gasket
• Improves housing strength and heat dissipation
• Zinc-plated stainless steel fasteners included
• Brushed finish for a clean, rugged look
• Helps reduce differential wear under load
• Fits 2011–2025 GM 2500/3500HD trucks
• Backed by a limited lifetime warranty

Add More Durability to your HD GM Truck with PPE

If you're looking to give your front differential a serious upgrade, the PPE Heavy Duty Cast Aluminum Front Differential Cover is built to deliver impressive durability and cooling performance. Designed for 2011–2025 Silverado and Sierra 2500HD/3500HD trucks, this cover is more than just a cosmetic piece, it's engineered to protect your differential under heavy loads and high-heat conditions, whether you're towing, off-roading, or daily driving with a little extra weight on the axle. What really sets this cover apart is its massive cooling fin design, inside and out. PPE has packed it with the largest set of cast fins in the industry, helping to draw heat away from the fluid more efficiently than the factory stamped steel cover. It also holds an extra three-quarter quart of fluid, giving your front diff a little more thermal buffer on long hauls and during hard pulls. The added capacity and improved cooling help extend fluid life and reduce wear on critical components.

Premium Aluminum Construction with Magnetic Fill Plug

To keep things clean inside the housing, PPE includes a high-powered Neodymium magnetic fill plug that pulls metallic particles from the oil before they can cycle through your gears and bearings. It also comes with a 1/8-inch stainless port for a temp sensor, making it easy to monitor your fluid temps if you're running gauges. Install is straightforward and uses the factory reusable gasket, so there’s no need to mess with RTV or custom seals. The cover itself is cast from A356.0-T6 heat-treated aluminum, giving it excellent strength without adding unnecessary weight. It’s finished in a clean brushed aluminum look that pairs well with both stock and modified undercarriages. Included zinc-plated hardware rounds out the package, making this a complete bolt-on upgrade that’s both functional and good-looking.

Fits: 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025 GM Sierra/Silverado 2500HD/3500HD

Notes:

• Fits 2011–2025 Silverado and Sierra 2500HD/3500HD, check fit before buying.
• Adds 3/4 quart of fluid for better cooling capacity.
• Large cooling fins pull heat away faster than stock covers.
• Helps extend fluid life and reduce gear wear under load.
• Magnetic fill plug traps harmful metal particles.
• 1/8-inch port allows for an optional temp sensor.
• Reuses factory gasket, no RTV needed.
• Cast from heat-treated A356-T6 aluminum for strength.
• Includes zinc-plated hardware for a secure, rust-free install.
• Brushed aluminum finish adds a clean, rugged look.
• Backed by a limited lifetime warranty.