I have a 2014 GMC Sierra 2500HD with the 6.0 gas burner. I have been looking at computer programmers and air intakes. Has anyone done any of these mods and did it increase your MPG any?
From what I read a lot of people have accomplished significant improvements in MPG by using a ScanGauge 2 or a Scangauge E which allows them to closely monitor instant mpg and average mpg closer than the onboard computer on their vehicles and change their driving habits. Also it allows for scanning any cel's that may effect performance of their vehicle.