I have 05 crewcab z71 with skyjacker 6in lift with edelbrock remote reservoir shocks, rancho front skid plate (works well along with skyjacker skidplate), 35in bfgs on 17x9 m/t simulocks,4.10 precision gears. they are a good compromise since i do alot of highway driving. i had 96 suburban with 4.56s with 37in bfg m/ts. i have heard that 5.13s are weak because to get all those teeth on the small gm 10 bolt ring and pinion the teeth are thin. i worked at a 4x4 shop for over eight years and i did not set up gears but the guy who did was great at it, it is an ART in itself. Also i use diablo predator for my tire and wheel change. these diablos are great. go to the diablo forum and you can learn to custom tune yourself. it takes time, but you CAN do it. there is alot of good custom tuners out there, but ever time you want a change are go to the dealer or other mech. you cant return truck to stock tune as you can do with a programmer. i have hypertech and superchips for paper weights. Also granatelli maf is at bottom of my pond(what a piece of crap, in my opinion) hope this info helps, any???s