Increase MPG
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?
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And to answer the OP's question, I've done it on an '11 2500 Suburban with the same engine, and I could only tell a small difference. I run an aftermarket intake and a B&B cat back exhaust with a Diablo tuner. I can tell by SOTP that it has a little bit more power, but fuel economy is only like 1 or 2 mpg better. That's about as close as any of my setups are, to what you have.
