Level out your Chevrolet? Silverado or GMC? Sierra 1500 truck with the Rancho? 2.25-in. LEVEL IT torsion key system. Featuring bolt-on installation, the kit comes with Rancho RS5000?X front shocks to accommodate tires up to 33-in. Rancho Level It RS66300R5 Suspension Leveling Kit 2007 Chevrolet Silverado 1500 Classic (Front) (Front Spring: Torsion Bar & Transmission Control Type: Automatic & Drive: 4WD / Qualifier: Red, Includes RS5000X Series Shocks, Raises Front 2.25 (in)); 1999-2006 Chevrolet Silverado 1500 (Front) (Front Spring: Torsion Bar & Transmission Control Type: Automatic & Drive: 4WD / Qualifier: Red, Includes RS5000X Series Shocks, Raises Front 2.25 (in)); 2007 GMC Sierra 1500 Classic (Front) (Front Spring: Torsion Bar & Transmission Control Type: Automatic & Drive: 4WD / Qualifier: Red, Includes RS5000X Series Shocks, Raises Front 2.25 (in)); 1999-2006 GMC Sierra 1500 (Front) (Front Spring: Torsion Bar & Transmission Control Type: Automatic & Drive: 4WD / Qualifier: Red, Includes RS5000X Series Shocks, Raises Front 2.25 (in))