When i bought this truck it had a bad lean. When i put my rear sway bar on it leveled it out. You may want to try that before you spend hundreds on suspension. The hellwig rear sway bar that i purchased was $190 after shipping.
2004 EXC Silverado 6.2L
Mods:
6.2L L92, Ported and Polished stage 3 heads, 95mm Throttle Body, 100mm MAF, NA, Pacesetter LT Headers, Magnaflow X-Pipe Muffler, Electric Fans, 160* thermostat, 2" Drop Shackles, Hellwig Sway Bars Front and Rear, Monroe Reflex Shocks, NGK Spark Plugs, AMW Oil Catch Can, 17"x10" wheels on Kuhmo Tires.