Bilstein 5100 Front 0-2.5", Rear 0-1" Lift Shocks Kit for 99-10 Chevy Silverado 1500HD 2500 2500HD 3500 3500HD 2WD / 4WD 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 Complete Set of 4 Shocks - 2 Front and 2 Rear (Does not work on Silverado 1500. Works on Silverado 1500HD only) Front Height: 0-2.5" Lift, Rear Height: 0-1" Lift Front Shocks: Extended: 11.3", Collapsed: 15.76"; Rear Shocks: Extended: 26.15", Collapsed: 16.14" . .