DOC'S DIESEL FUEL FILTERS - Doc's Fuel Filters remove contaminants like separate water from dirt, rust, and debris, protecting fuel system components and ensuring peak engine performance. They optimize fuel flow and pressure, enhancing acceleration, fuel economy, and vehicle performance. With a focus on maximizing filtration media surface area, our high-quality filters come complete with o-rings as needed. INTERCHANGE - Replaces AC/Delco TP1015, Replaces Wix WF10451, Replaces Premium Guard DF99173, Replaces Purolator F21393 FITMENT - Compatible with 2017-2019 Chevrolet/GMC 6.6L Duramax 2500HD, 3500HD, 2020-2025 Chevrolet/GMC 3.0L Duramax 2500HD, 3500HD THIRD PARTY TESTED - 3 Micron @ 96.92% Efficiency Rating REPLACEMENT GUIDELINES - Above all recommendations, change according to your vehicle’s manufacturer warranty. Fuel Filters should be changed every 5,000 to 10,000 miles, or 15,000 maximum. Doc's Fuel Filters remove contaminants like separate water from dirt, rust, and debris, protecting fuel system components and ensuring peak engine performance. They optimize fuel flow and pressure, enhancing acceleration, fuel economy, and vehicle performance. With a focus on maximizing filtration media surface area, our high-quality filters come complete with o-rings as needed. INTERCHANGE: Replaces AC/Delco TP1015, Replaces Wix WF10451, Replaces Premium Guard DF99173, Replaces Purolator F21393. FITMENT: Compatible with 2017-2019 Chevrolet/GMC 6.6L Duramax 2500HD, 3500HD, 2020-2025 Chevrolet/GMC 3.0L Duramax 2500HD, 3500HD