It seem that the milage suck and the truck has 46,000 mile on it and mpg is around 10 on the hwy at 70 mph. Any suggestions on what to check or change to improve the mpg?

 

I have an '05 with 117k on it and I am getting around 13 mpg which isn't much better. I bought a programmer for it which was supposed to increase gas mileage but I couldn't really see much of a difference. I think K&N air filters say they boost mpg's a little. Changing your spark plugs & wires may help also. If all else fails maybe it's your driving style. Good Luck.