General Information Year 2017 Make GMC Sierra SLT Model 2500 Color Black Packages Duramax Plus, All Terrain 2017 GMC Sierra SLT 2500 (Black) Modifications Exterior Tonneau cover Gallery 14970.jpg 50.9 KB Views: 26 14978.jpg 16.6 KB Views: 27 14986.jpg 9.6 KB Views: 26 Share: Facebook Twitter Reddit Pinterest Tumblr WhatsApp Email Link