For GMC Sierra 2500 3500 4WD Air Suspension. Please double confirm the part number of your suspension to ensure you will get the right item!! For GMC Sierra 2500 4 Wheel Drive 2020 – 2024. For Chevrolet Silverado 2500 4 Wheel Drive 2020 – 2024. Fits For 4 Wheel Drive Models ONLY Not fit for commercial chassis models and side-mounted hitches. Minimum PSI: 10 PSI. Internal Jounce Bumper included: Yes. Placement on Vehicle: Rear left and right. Package Length, width and height: 370300250mm. Package Wight: 17.7kg. Package includes(as the picture shows). 2x Heavy Duty Double Bellow Air Ride Suspension bags. 4x Upper and lower mounting brackets. Includes All Brackets & Hardware Needed to Install. Stress Test Over 5,000,000 Times:Durable and Safe. Burst Pressure? 2.0MPa:High Compressive Strength and Less Noise. 24 Hours Air Tightness Test? 0.02MPa:100% Air Tightness Guarantee. Temperature Range? -40? /? 70? :Premium Natural Rubber Material. Use high-quality steel with high load-bearing capacity and long life. Excellent and practical bolt-on installation. Safe carrying capacity and stability. Restore the original ride height and improve ride quality. Ensure our driving comfort and reduce tire wear. Instruction is not included. Professional installation is recommended. Other items you might also like. Pair Rear Pre-Assembled Rubber Springs For GMC Chevrolet Silverado 2500 3500 HD.