Readylift 66-3122 Leveling Kit for Chevy Silverado 3500 HD<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>GM 2500HD/3500HD OEM Style 2" Rear Lift Block Kit</li><li>For Use Only on Single Rear Wheel 2500HD trucks that have the factory Trailer Package rear springs</li><li>For Use On 3500HD dual rear wheel trucks</li><li>Like all ReadyLift products these block kits come with our Lifetime Warranty.</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51%2B4PioKfUL.jpg" noproxy>