Yup exactly what wild turkey hunter said!!
It does look cool on your truck but you will need a aligment. It could also weakin the torsion bars due to the load. The biggest thing you gotta watch out for is if you pull a heavy load in 4wd with your truck you can break the tie rod ends real easy. My buddy was pulling his jeep up a stone road with his dmax and you could watch the tires shake when he got on it. This happend alot to people that truck pull. The fix for that is tie rod sleeves.
2006 Silverado 2500HD LBZ CC SB
Exterior: Escalade Handles, Front windows tinted to match the rear, painted bumpers & mirrors, billet grille, 305/50/20 Cooper Zeons on BMF Novakanes Death Metal, Cognito Braces, Stainless Sleeves, Train Horns
Interior: 4 Kicker 10in Subs in 2 custom box's, Autometer Ultra lite II Pyro and Boost gauges, Aeroforce Interceptor Gauge, LED Lows & Fogs, Painted accents
Performance: EFI Live Tuned by Blackout Performance, Custom Blackout Performance S475 over stock twins, 45 over stock injectors, MBRP Turbo Back Stainless Exhaust (Straight piped), Raptor Lift Pump, AFE Filter, GMAX6 kit with Suncoast 1057 converter installed by Blackout Performance
1999 Ford F-550 PowerStroke ''Wrecker'' **Jerrdan bed, S&B Intake