PREFECT FIT: OEDRO truck bed tonneau cover is compatible with 2014 2015 2016 2017 2018 2019 Chevy Silverado / GMC Sierra 1500 (2019 only fits Legacy or Limited); 2015-2019 Silverado / Sierra 2500 3500 HD | Fleetside 6.6 ft / 78.8 in bed | NOT FIT Multi-flex tailgate & Utility track system. GREAT EXPERIENCE: OEDRO’s trifold truck bed tonneau cover gives your truck the perfect combination of security, convenience and appearance. It is easy to install and the tailgate lock turns your truck bed into a completely secure trunk which is snow proof and dust-proof. HEAVY DUTY MATERIAL: Being made of double layer PVC, OEDRO’s tonneau cover has been thoroughly tested for UV protection, good tensile properties. Pre-assembled powder coated rails and aluminum clamps are included for easy installation and great stability. EASY INSTALLATION: No extra tools are required and in most cases no drilling. Smooth and simple installation with the included instruction manual.(Small holes need to be cut for trucks with rail cap or over-the-bedrail bed liner to secure the clamps; No cut needed for pick up with under-the-bedrail bed liner). All Around Protection: Please measure your truck bed size or contact us before buying. With the tailgate locking, your truck bed can be instantly converted into a 100% secure snow-proof and dust-proof trunk. Waterproof strips are included; The truck bed tonneau cover provides day and night security and all around protection.