Allison Transmission PTO Side Plate Cover with Raw Finish

Features:

• Fits 2001–2019 Silverado and Sierra HD
• Designed for 6.6L Duramax with Allison
• Heavy-duty cast aluminum construction
• Replaces factory PTO side plate cover
• Helps prevent transmission oil seepage
• Strengthens center of transmission case
• Raw finish for rugged, clean appearance
• Cooling fins double surface area
• Improves transmission heat dissipation
• Includes gasket and mounting hardware
• Precision fit and long-term durability

A Stronger, Cooler Upgrade for Your Allison

If you're running a 2001–2019 Silverado or Sierra HD with the 6.6L Duramax and an Allison transmission, the PPE PTO Side Plate Cover is one of those upgrades that just makes sense. From the outside, it may look like a simple replacement, but once installed, it brings a real boost in durability and cooling performance. The factory cover isn’t built to handle serious demands, especially in high-heat or heavy-duty applications. PPE’s version is cast from tough aluminum and features a raw finish that looks clean and rugged on any build. It’s designed to reinforce the center of the transmission case, helping to prevent flexing and eliminate oil seepage at the mating surface.

Built to Handle the Heat

What really sets this side cover apart are the integrated cooling fins, which more than double the surface area compared to stock. That means significantly improved heat dissipation, which helps your transmission run cooler and more efficiently under load. Whether you’re towing, hauling, or just driving hard in hot weather, that extra cooling capacity adds peace of mind. The kit comes ready to install with all necessary hardware and gaskets, so you can knock it out in the garage without needing extra trips to the parts store. If you’re chasing long-term reliability or just want to beef up a weak spot in your drivetrain, this PPE side plate is a smart, practical upgrade.

Fits: 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax