Black-Cadi, you'll find that people will direct you to the "search" button many time lol, it actually is difficult to search on here in my opinion, but we have a designated forum on here for each individual area of your truck, whether it be interior/ext,engine tranny, programmers etc, I kno they don't make many programmers for the LML 2011s yet so there is a limited number of tuners you can select, but like I mentioned at the show today, you'll find that EFI Live is the #1 BEST tuning system for Duramax, its not avail for your truck yet, but hopefully it will be soon, PPE is also another great tuner that doesn't have anything for the LML yet I don't think, you will also find that in general for the 2001-2010 models Bullydog programmers are "Ok" so to speak but don't put numbers down like Efi, which is a custom and most of the time Dyno proven tunes that can be made for your specific truck, but meanwhile hang in there with the bully dog it'll be fine for now, we should get together sometime and ill take u for a ride in my truck and mayBe u can take me for a ride in that nice Denali LMl! I've been wanting to see how smooth they run...well welcome to the forum and it will be addicting, if you got any ?s feel free to contact me, I'm jus down the road!