DOC'S DIESEL MAINTENANCE KITS - Doc’s Diesel Maintenance Kits save you time and money by giving you the filters you need in one convenient package. No more running around trying to find the right parts. Just grab a kit and get the job done! Swapping filters on time keeps your truck running strong and efficient, and with our Maintenance Kits, it’s easier than ever. FITMENT - Compatible with Chevrolet/GMC 6.6L Duramax 2500HD, 3500HD 2020-2025 INTERCHANGE - Doc's Diesel Chevrolet/GMC 6.6L Duramax Filter Maintenance Kit 2020-2025 includes (1) Fuel Filter (DGF429) - Replaces AC/Delco TP1015, Replaces Wix WF10451, Replaces Premium Guard DF99173, Replaces Purolator F21393. (1) Oil Filter (D11878) - Replaces GM 12684038, Replaces AC/Delco PF26, Replaces Wix WL10454, Replaces Baldwin B7449, Replaces Premium Guard PG9952EX. (1) Engine Air Filter (DPA11888) - Replaces GM 84554703, Replaces Wix WA11057, Replaces Baldwin PA10426, Replaces Premium Guard PA99537, Replaces Purolator TA31515. (1) Cabin Air Filter (D3932C) - Replaces GM 13508023, Replaces AC Delco CF185, CF1184C, Replaces Baldwin PA10369, Replaces Premium Guard PC4211C THIRD PARTY TESTING - Doc's Fuel Filter (DGF429): 3 Micron @ 98.13% Efficiency Rating. Doc's Oil Filter (D11878): 25 Micron @ 99% Efficiency Rating. Doc's Engine Air Filter (DPA11888): 99.25% / 344.2G Dust Holding Capacity. Doc's Cabin Air Filter (D3932C): Electrostatic media stops particles down to .001 Microns REPLACEMENT GUIDELINES - Above all recommendations, change according to your vehicle’s manufacturer's warranty. Fuel/Water Separators: Every 5,000-10,000 miles or 15,000 miles maximum. Oil Filters: Every 5,000-7,000 miles or 10,000-15,000 miles maximum. Transmission Filters: Every 25,000-50,000 miles or 60,000 miles maximum. Engine Air Filters: Every 5,000-10,000 miles or 12,000 miles maximum. Cabin Air Filters: Every 15,000 miles or 12 months maximum. Doc’s Diesel Maintenance Kits save you time and money by giving you the filters you need in one convenient package. No more running around trying to find the right parts. Just grab a kit and get the job done! Swapping filters on time keeps your truck running strong and efficient, and with our Maintenance Kits, it’s easier than ever.