If you look at GMs specs the truck bedsides and bed floor are only 1" or less taller. The truck actually isn't that tall, mostly its just the hood.
2011 Chevrolet Silverado LML 3500HD CC/LB SRW LTZ
Toyo M/T 37x13.5R20, BMF S.O.T.A. 20x9 Stealth, Cognito 7-9" with UCA, Fox shocks, Saulastic Shackles, Bushwacker flares, Anzo Lights, Weathertech Floors, AFE Stage 2 Intake, Mini Maxx, MBRP 5" stacks, Trex Billet grille & bowties, AMP steps, LineX Xtra, Custom Headache rack, AirDog II 165, Titan 60g tank w/ADP sump, ARB compressor, DC power 325amp alt, Fab four bumpers, Warn Zeon winch, lots of Rigid lights.
2005 Chevrolet Kodiak 5500 4x4
CM-SK flatdeck, Alcoa 22.5s, Link air ride cab.