Specs:compatible with | 99-10 Silverado Sierra 1500HD 2500 2500HD 3500 3500HD With A 0" To 3" Lift, 5100 Shock Absorbers compatible with | * : | * Silverado 1500HD: | * 2001-2007 | * With 0" to 3" of Lift in the Front | * With 0" to 1.5" of Lift in the Rear | * Including Base, Classic, LS, and LT | * Excluding Quadrasteer | * Excluding ZX3 Electronic Suspension | * Silverado 2500: | * 1999-2005 | * With 0" to 3" of Lift in the Front | * With 0" to 1.5" of Lift in the Rear | * Including Base, Cheyenne, Custom, LS, LT, and WT | * Excluding Quadrasteer | * Silverado 2500HD: | * 2001-2010 | * With 0" to 3" of Lift in the Front | * With 0" to 1.5" of Lift in the Rear | * Including Base, Classic, LS, LT, LTZ, and WT | * Silverado 3500: | * 2001-2007 | * With 0" to 3" of Lift in the Front | * With 0" to 1.5" of Lift in the Rear | * Including Base, Classic, LS, LT, and WT | * Silverado 3500HD: | * 2006-2010 | * With 0" to 3" of Lift in the Front | * With 0" to 1.5" of Lift in the Rear | * Including Base, LT, LTZ, and WT | * : | * Sierra 1500HD: | * 2001-2007 | * With 0" to 3" of Lift in the Front | * With 0" to 1.5" of Lift in the Rear | * Including Classic, SLE, and SLT | * Excluding Quadrasteer | * Excluding ZX3 Electronic Suspension | * Sierra 2500: | * 1999-2004 | * With 0" to 3" of Lift in the Front | * With 0" to 1.5" of Lift in the Rear | * Including Base, SL, SLE, SLT, and WT | * Excluding Quadrasteer | * Sierra 2500HD: | * 2001-2010 | * With 0" to 3" of Lift in the Front | * With 0" to 1.5" of Lift in the Rear | * Including Base, Classic, SL, SLE, SLT, and WT | * Sierra 3500: | * 2001-2007 | * With 0" to 3" of Lift in the Front | * With 0" to 1.5" of Lift in the Rear | * Including Base, Classic, SL, SLE, SLT, and WT | * Sierra 3500HD: | * 2007-2010 | * With 0" to 3" of Lift in the Front | * With 0" to 1.5" of Lift in the Rear | * Including SLE, SLT, and WT