I have a 2010 terrain with 3.0 liter. I am wanting to do some minor changes to help low end torque. And keep the transmission from downshifting so much when cruising around 80 or so. This vehicle my wife drives so I don't want any drastic changes but they have put this small engine in a 4000 lb truck. In other words I want to make sure these changes are possible with this program before I purchase. I also have a 2009 silverado with 5.3 I know it will work with it but my main concern is the Terrain.