As you can see I'm a newbie on here. I just purchased a 09 Denali and want to start my project. I have read through the forum and know I want exhaust, HID's, Black Bear Tuning CAI etc. The problem I see is most don't offer for the 09's. What would you guys suggest I start with first? I did a 05 dodge Cummings and trashed a few parts because I didn't research well enough before I started. All suggestions are greatly appreciated.