After searching this site for help building up my 2008 SL Sierra as a guest I finally joined to say thank you. Several threads helped me tremendously ie: tire threads, exhaust threads and programming threads. My Sierra started out a plain SL. Since I bought it I added a leveling kit,Volant Cai, Hypertech programmer, Gibson stainless duel exhaust, 285/75 r17 BFG Allterrain KO's, chrome package,Nasta running boards, PIAA fog lamps and I changed out the black plastic grille for a chrome surround one. I recently moved back to Texas and I am looking for suggestions where to take it off road at. I am in the DFW area. Thanks!