2011 Chevy Silverado Gmc Sierra 2500 3500 Hd, 2012 Chevy Silverado Gmc Sierra 2500 3500 Hd. 2013 Chevy Silverado Gmc Sierra 2500 3500 Hd, 2014 Chevy Silverado Gmc Sierra 2500 3500 Hd. 2015 Chevy Silverado Gmc Sierra 2500 3500 Hd, 2016 Chevy Silverado Gmc Sierra 2500 3500 Hd. 2017 Chevy Silverado Gmc Sierra 2500 3500 Hd, 2018 Chevy Silverado Gmc Sierra 2500 3500 Hd. 2019 Chevy Silverado Gmc Sierra 2500 3500 Hd, 2020 Chevy Silverado Gmc Sierra 2500 3500 Hd. 2021 Chevy Silverado Gmc Sierra 2500 3500 Hd, 2022 Chevy Silverado Gmc Sierra 2500 3500 Hd. 2023 Chevy Silverado Gmc Sierra 2500 3500 Hd. Rear left and rear right. Up to 5,000 lbs. Grade of the steel. You may need a spacer. The kit will not fit.