All Car Supplies CA. For GMC Sierra 1500 AT4 Air Suspension. Please double confirm the part number of your suspension to ensure you will get the right item!! Internal Jounce Bumper included: Yes. Load capacity:Up to 5000 LBS. Placement on Vehicle: Rear left and right. Package Length, width and height: 362522cm. Package Wight: 14.6kg. 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. Will this fit my car? Please make sure you have read through the whole listing and paid attention to “note” and “notice”. When will my order be dispatched? Can I amend my order? What do I do if I have not received my order? What do I do if my product is faulty? It will speed up the process if you could provide us some pictures or video to illustrate the issue details. We will offer solutions to such cases.