Features: 1. 100% NEW, Easy to install. 2. Built to strict quality standards and use superior quality parts. 3. More efficient, better cooling. Fit For : For 2001-2010 Chevy Silverado 1500HD 2500HD 3500HD 2WD 4X4 For 2001-2010 GMC Sierra 1500HD 2500HD 3500HD 2WD 4X4 Package includes: 2 x Rear Drop Shackles 2 x Screws Note: -Please double confim the compatibility as well as the OE number before purchasing. -Instruction is not included. Professional installation is recommended -Contact us please for whatever we can help .