On my 1st trip pulling anything with my new (new to me) truck to Lake Fork, I got 13.7MPG. 3/4 highway doing 65-70 mphish and the rest 2 lane back roads.
Towed about 2500 lbs boat and trailer, bed loaded down, and 4 adults. Smooth ride, picks up and slows down with ease! We rented a cabin on the lake with a private boat ramp that was pretty steep, the 1st attempt I was too far over and had to come all the way out to get strait but the rears kept breaking lose because of some gravel so I put it in 4X4, no spin at all came right out.
TRIM: LT Z71
MOTOR: 5.3L (no mods)