Shift your weight onto your elbows as you step back with the other foot and place your feet together. Hold until your form starts to fail or until you are no longer able to keep our abs pulled to your back. Step into the ball with one foot at a time. 1  Equipment notes.
For comparison's sake, most modern trucks manage between 5.5 and 6.5 mpg. For most long-haul truck drivers, an increase in fuel economy of 54 percent would equate to a savings of around $25,000 per year at current diesel prices.
Getting 20 mpg from a massive truck traveling at speeds around 70 mph is no small potatoes; it's an impressive result, especially given the Denali trim's comfort, quietness and luxury trimmings. With the Yukon's 26-gallon gas tank, that kind of mileage can provide a range of more than 500 miles.