I've got a 2003 2500 LQ4 4WD burb I've been building beefing up suspension for a while. Cognito 2.5" leveling kit, steering brace, Fox shocks, rare parts tie rods, idler, pitman and bracket etc. For a full size it goes anywhere a full size should go..lol very capable platform well built easy to get parts. Just did a Blackbear tune and love it. Much better drivability always feels like in the right gear no MO lazy throttle response, instant downshifting when giving it the beans. I removed 75% of the tq management and limited myself to 95mph...lol it gets up to speed much better now. They say 35-50 hp with Cai (intake tube drop in K&N panel filter) and Magnaflow dual exhaust it feels like it seat of the pants. 87 octane and corrected my speedometer due to tire size 285/75/16.