Fitment: For GMC Sierra 1500 RWD 2007 - 2019For GMC Sierra 1500 4WD 2007 - 2019For GMC Sierra 1500 Limited RWD 2019 - 2019For GMC Sierra 1500 Limited 4WD 2019 - 2019For Chevrolet Silverado 1500 RWD 2007 - 2018For Chevrolet Silverado 1500 4WD 2007 - 2018For Chevrolet Silverado 1500 LD RWD 2019 - 2019For Chevrolet Silverado 1500 LD 4WD 2019 - 2019Only fits for 69.3 in/78.7 in. Bed   Only fits for 69.3 in/78.7 in. Bed   Package Includes: 2x Air springs Air lines Schrader valve Mounting Bracket   Load Capacity: 5000 lbs up Placement: Rear,Left,Right   Feature: Keep proper ride height Replace your factory jounce bumper Reduce bouncing at the rear of vehicle when towing Stop vehicle’s main springs from sagging (due to constant load compression) When towing / hauling heavy loads,air springs raise safety /comfort working with your suspension Two adjustable secondary air helper springs can add up to 5,000 pounds of leveling capacity per axle for vehicles with leaf springs1.Notice：California Prop 65 Warning 2.Code: MXR02FXSY 3.Authority ID：MXR02FXSY