sc4668
Well-known member
Hi all, just got back from a 1200 mile trip towing my Denali 35 ft. fifth wheel. The trip perfect. I have a question on what others get as far as gas mileage with their V10 engine. The truck has the 4:10 rear and the trip was thru mountains and winds and 65 mph speeds. We averaged 6.4 MPG. Is the all I can expect as what are others getting. I have to say this truck was more than I expected it towed perfectly even with the winds. Thanks for all your replies.