2020-2024 GM 2500 & 3500 Crew Cab, Long Bed Duramax Diesel Fuel Tank. 4X4 ONLY (7010320) This is a 60-gallon, heavy-duty, replacement fuel tank for 2020-2024 GM 2500HD and 3500HD pickups with Crew Cabs, Long Beds, and Duramax diesel engines. Texas Truckworks in Montgomery County, Texas, specializes in extended range fuel tanks.