Hi I am looking at tuners for a 2006 Chevy SSR. Are their any good ones out their. I was looking at the diablo tuner. I want something that adds a little more horse power and gas mailage. If I would have to choose I will take the increase in hp. Which diablo tuner or any other tuner is best for the 2006 Chevy SSR. I seen some diablo tuners that increased hp by 50-120hp but that was for other vehicles. Thanks for any input.