Extang 14-18 Chevy/GMC Silverado/Sierra 1500 (8 ft) Trifecta ALXThe easiest truck bed cover just got easier. The Trifecta ALX packs the same great features as Extang?? s best selling tri fold cover, the Trifecta 2. 0, but with a Secure Rotary Release Latching System at the tailgate and an automatic latching feature that?? ll make getting the goods in and out of your truck bed that much faster. This Part Fits: Year Make Model Submodel 2015 2018 Chevrolet Silverado 1500 LS 2014 2018 Chevrolet Silverado 1500 LT 2014