Fitment:2016-2018 Silverado 1500 Custom Extended Cab Pickup 4WD (Exc. Electronic Susp.)2014 Sierra 1500 Base Standard Cab Pickup 4.3L 4WD (Exc. Electronic Susp.)2015-2018 Sierra 1500 Base Standard Cab Pickup 5.3L 4WD (Exc. Electronic Susp.)Part Numbers:2391122, 3450742Position:Front RearFeatures:> 100% brand new in factory original condition. Never been used or installed.> Enhances overall handling, safety and performance of your vehicle.> OE Quality TS16949 certified.> Pressurized N2 gas to reduce foaming and aerating. Also to ensure product better performance.> Effectively to reduce the effect of traveling over rough ground.> Seamless cylinder & sleeves to reduce the possibility of splitting to ensure close contact between the piston & cylinder no leaks to obtain stable damping force.> Precision robotic welding in most of the applications.> Hard chromed piston rod micro-cracks chromed surface processed & ultra-precision vertical polishing to ensure smooth contact between the piston rod & seal.Buckle holes are consistent with the original car in situ for easy & quick installation without any changes.> Newer valving technology operates in stages based on the velocity of the car.FREE SHIPPING