[elle]

I recently bought a 2011 Tahoe and with the 6spd trans it's way down on power.

Anyone have any luck with tunes and will they void my warranty?

I'm looking to get the Diablo puck for my dodge diesel, as many have told me how great it is and i won't have to worry about a trans being fried.

Brands, do's/don'ts?

thanks!