Fleece FPE-DMAX-CBOP Billet Coolant Block Off Plate | 2001-2017 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Features:

• Precision machined billet aluminum construction
• Thicker design than factory plate
• Prevents coolant leaks over time
• Integrated square-cut O-ring seal
• No gasket required for installation
• Improves durability in high-mileage engines
• Engineered for a long-lasting, tight seal
• Direct fit for 2001–2017 Duramax engines
• Simple and clean install process
• Ideal for performance and reliability upgrades
• Eliminates common leak-prone stock plate

Eliminate Leaks And Lock Down Long Term Reliability

If you've ever dealt with coolant leaks on your Duramax, you know how frustrating and messy they can be, especially when they creep in from overlooked components like the factory block off plate. That’s where the Fleece Billet Coolant Block Off Plate steps in to save you from future headaches. Built thicker and stronger than your stock plate, this upgrade is engineered to handle long-haul mileage, temperature swings, and the pressure that comes with hard working diesel engines. It comes with a built-in square-cut O-ring that seals tight without needing a gasket, keeping things clean and simple under the hood. Whether you're maintaining a reliable daily driver or upgrading a performance build, this plate helps eliminate a common failure point and reinforces your cooling system. Installation is quick and straightforward, and once it's on, you can trust it to hold up without second guessing it every oil change. It’s a small upgrade that delivers peace of mind and long-term durability you’ll appreciate down the road.

Engineered To Seal Better And Last Longer Than Stock

The Fleece FPE-DMAX-CBOP Billet Coolant Block Off Plate is precision-machined from billet aluminum to provide a more durable and effective solution than the thin factory plate found on 2001–2017 Duramax trucks. Its increased thickness offers enhanced rigidity, reducing the risk of warping or leaking under high-heat, high-pressure operating conditions. The plate features an integrated square-cut O-ring that eliminates the need for an additional gasket, simplifying installation while maximizing sealing reliability. This design helps protect critical components by maintaining proper coolant system integrity and avoiding seepage that could lead to corrosion or performance issues over time. It’s a direct-fit solution designed to drop into place without modification, making it ideal for both stock configurations and modified trucks. The robust design also makes it a smart preventative upgrade for anyone already working in the cooling system area. Whether you're chasing leaks or just looking to bulletproof your setup, this component adds a layer of confidence to your build.

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

Notes:

• Fits 2001–2017 GM 6.6L Duramax 2500HD and 3500HD models
• Thicker billet design improves durability over stock plate
• Integrated square-cut O-ring eliminates the need for a gasket
• Helps prevent long-term coolant leaks from developing
• Ideal for both daily drivers and high-performance builds
• Recommended as a preventative upgrade during coolant system service
• Simple bolt-on installation with no modifications required
• Replaces a common failure point in Duramax cooling systems
• Machined for a precise fit and long-lasting seal
• Not compatible with models outside the 2001–2017 Duramax range