Lift / Leveling Kit for 2007, 2008, 2009, 2010 GMC 1500 4X4 Sierra, Silverado, Chevy Tahoe, or GMC Yukon Includes Complete Instructions for the Do-It-Yourselfer New factory struts are not required and no permanent changes are required. Simple-bolt installation. Factory struts can be used. Eliminates the "front heavy" look. No permanent modifications to factory parts. Limited lifetime warranty on parts. Made in the United States (in Morristown, TN)