Hello everyone with the 3.0 Duramax. I have a 2022 Suburban with the Duramax. I just hit 3500 miles on the odometer and still have 3/4 of a tank of DEF. It came with a full tank of DEF when we bought it new in late March. Just wondering if this is normal. We don't do a ton of towing and most of the miles are from driving above 60 mph. Thanks ahead of time.