u/2Wheeled_2ourist

How Fuqed am I? 2023 DURAMAX 2500 L5P all stock filled the tank completely with fresh Diesel and then in a brain dead moment while distracted inadvertently added 2.5 gal of DEF to the tank. I realized what I did immediately so I didn’t drive it.. only ran it long enough to move it away from the pump. Can I get away with simply draining the tank, flushing the lines and replacing the fuel filter? Thanks in advance.