Hey guys Just finding out about site. I have a 2007.5 Gmc Duramax cc/sb 4x4 all stock except wheels. Just got it that is why. This is my 3rd Duramax. I really like the site and would like to just say hey to everyone. My truck only has 52,000 miles and is under warranty so what all upgrades would you recommend I wanna try and keep my warranty. Thanks