Manufactured by McGaughys | 33200 | 2011-22 Silverado/Sierra 2500/3500 1.75 Inch Lowering Shackles, These will also fit the 2020 to 2022 Silverado/Sierra 2500/3500 trucks, 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 2023-01-30