SlamAir 59103 Air Lift Company Slam Series Air Suspension Kits Air Lift Performance Air Lift Accessories RealTruck Air Lift SlamAir Air Helper Springs for Lowered Trucks Rear Axle Air SlamAir 59209 Air Lift Company Air Lift SlamAir Air Helper Springs for Lowered Trucks Rear Axle Air. Restore load carrying capacity and eliminate bottoming out by adding SlamAir air helper springs to your lowered vehicle. SlamAir kits supplement a lowered truck's leaf springs to provide adjustable spring rate for ride comfort, safety and variable loads. Easy to install between your existing springs and the vehicle frame, they are made with rugged, durable components for long, reliable service. Air Lift SlamAir kits fit most lowered trucks with a 2 6 inch drop, including trucks with flipped axles and notched frames. SlamAir air helper springs are air adjustable from 5 to 100 PSI and come with quick connecting, easy to use air fittings. They also come standard with a limited lifetime warranty and an exclusive 60 day ride satisfaction guarantee. This Part Fits: Year Make Model Submodel 1999 2005 Chevrolet Silverado 1500 Base 2016 2017 Chevrolet Silverado 1500 Custom 2014 2017 Chevrolet Silverado 1500 High Country 2004 2006,2009 2013 Chevrolet Silverado 1500 Hybrid 1999 2013,2015 2017 Chevrolet Silverado 1500 LS 1999 2017 Chevrolet Silverado 1500 LT 2007 2017 Chevrolet Silverado 1500 LTZ 2005 2006 Chevrolet Silverado 1500 SS 2015 2017 Chevrolet Silverado 1500 SSV 2002 2017 Chevrolet Silverado 1500 WT 2010 2013 Chevrolet Silverado 1500 XFE 2002 2005,2014 2016 GMC Sierra 1500 Base 2007 2016 GMC Sierra 1500 Denali 2002 GMC Sierra 1500 HT 2005 2006,2009 2013 GMC Sierra 1500 Hybrid 1999 2003,2006 2013 GMC Sierra 1500 SL 1999 2016 GMC Sierra 1500 SLE 1999 2016 GMC Sierra 1500 SLT 2002 2013 GMC Sierra 1500 WT 2010 2013 GMC Sierra 1500 XFE