Manufactured by McGaughys | 34050 | 2007-16 Silverado/Sierra 1500 2Wd/4Wd 2 Inch Drop Spindles (See Fitment Notes), Must use at least 17 inch wheels, 2 or 4 wheel drive with cast steel control arms. Most mid-2016 models and later use stamped steel control arms that these will not work with. Check for RPO code AVV to see if it has stamped steel. Will not fit 2014-2016 4wd, McGaughys started off manufacturing suspension parts for classic Chevy cars but over the years they have evolved into a full line suspension manufacturer including Lowering Suspension, Lift Kits as well as Classic Car Suspension parts. Product information updated on 2024-07-04. This product can ship by Small Parcel