2024 Gmc Sierra 2024 Denali 3.0 Duramax Mpg. I've had one tank (707 miles) that went 33 mpg. Picked up my 2024 3.0 duramax ltz 2 weeks ago and noticed a few things that i have questions on.
I’ve had one tank (707 miles) that went 33 mpg. I would never believe anyone that says they get 20+ mpg with their duramax diesel in a 2500 or 3500.