Air Lift 57275 Loadlifter 5000 Series Rear Air Spring Kit

I installed these bags to a "saggy" 2006 Duramax which otherwise may have needed new leaf springs. The truck was sitting front end high and back end low even before towing. With the purchase of a new 11,000# fifth wheel trailer, I knew something had to be done. I installed these over the course of a couple evenings. The job was not too painful with the truck suspension hanging from jack stands. The installation instructions were good and easy to follow. I watched Youtuve videos for the most part. Some are very good to describe the job. I installed the schrader valves into the bed of the truck so I could use an external air tank. My biggest concern was that the bags would not hold air. Particularly if the bag was set to the minimum 5psi and I left it for a few months (the truck is only really used in the summer). After installation, I left the truck outside in the cold for a couple months, then used it to haul a load to the dump. On checking the bags, they had lost ZERO air pressure. This made me very happy. The ride is also improved, as is the truck's stance. So far a great investment. I will update after I have a chance to tow with it.

De buena calidad y funcionan excelente, ya se probó con 2 toneladas a 50psi y jalo a la perfección

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Have a 2007 4WD K3500 that is used to haul shipping containers, which is needless to say, a substantial load. Due to the weight of the containers, along with the trailer, I found the helper springs on the truck were maxed out evidenced by the 'shiny spot' on the springs. Once the air bags were installed, there was an immediate difference noted in the suspension for both the handling and ride. With the AIR LIFT 72000 Wireless Air Leveling Compressor - [also installed ], I can stand back from the truck and trailer and get the load perfectly level. No more uneven squat to the rear of the truck when it is under load. As a side note, the installation took about 5 hours, with the truck on a lift. Instructions provided were pretty good, but be prepared to spend the extra time to find just the right spots for your compressor and valve assembly and be sure to keep the air lines as protected as possible. I usually run at about 5 - 10 psi when empty since the truck has a pretty stiff ride already, but now, even with the full load of containers, the truck and trailer sits dead level at 45 psi. Another benefit is the loading and unloading of the trailer - with or without the containers on the trailer. When I am ready to disconnect from the trailer, I simply inflate the bags to 100 psi and then crank the trailer landing gear down. After just a few turns, and the feet are under load, I again deflate the bags which allows the truck to lower itself off the ball. Definite time saver and saves wear and tear on the trailer landing gear - not to mention my arms too. With an estimated tongue weight on the gooseneck ball of >4000+ lbs, it really just works like a charm. Reverse the process when loading - center the gooseneck over the ball and inflate. If you are hauling heavy loads - even part time, this is a great addition to your truck. Net of this story - highly recommend this system [both AirBags and the wireless compressor system] for safety, stability and comfort. Thanks again to Air Lift. This is an incredible product that provides great value and is well priced.

Installed on a 2010 GMC 2500HD. Installed full kit along with Air Lift on board compressor and gauges. To start of with this seems to be a great product. Just installed it today. This is a long review but hopefully it will help the next person. Do not try to install this if you are a beginner DIY mechanic. I am by no means a professional but I have installed 100's of snow plows, spreaders, and de-icer systems so I do have plenty of experience with after market accessories. I would try this unless you're at least an intermediate mechanic, even if just for the necessary tools. All in all I probably had about 7 hours in the install (alone) but a good 1.5hr was just figuring out where I wanted to mount the compressor, gauges, and solenoid. I did the full kit with on board compressor. The kit came very well packaged in manufacturers boxing, all the hoses, hardware, pieces where there and packaged separately. I strongly suggest reading the instructions thoroughly a couple times before starting. They skip around a bit and have important notes but are not in order. Some of the instructions say to use a torque wrench which first of all most DIY guys dont even have. Unless it's just this kit, you will not be able to get a torque wrench on the upper bolts as it says to. Take your time and plan your install. You will need jack stands and a good jack. The instructions say to support the axel with jack stands which is incorrect. You'll want to support the frame with jack stands so you can use the jack to move the rear end up and down to accommodate installation. With the airlines, btw not 1 leak after installed, take your time with your cuts. Make sure they are very cleanly cut and not beveled edges. I made sure my cuts were perfect and left plenty of slack not only for movement but incase I had to re-cut. I used a sharp razor. When you push them into the fitting you'll feel a slight pop, you need to push them in farther to seat the airline. This is probably where most people have air issues. They will slightly pop and then slide in an additional 1/8 to 1/4 inch. Practice before you try under the truck, the are easy to remove my pushing the pressure fitting in and pulling the hose back out. The compressor works great up to about 50lbs then it does slow down a bit but what would you expect from a tankless system under $200. Pumped up to 90lbs for test in about 3 or 4 minutes. When installing the wiring you will want a couple "add a fuse" kits to tie in to the fuse panels. Most parts stores have them for about $7. They are not in the kit. Last but not least I used the extra onions and 1 that I bought to run a single manual line to the rear number just incase the compressor goes out towing or just to keep a safe pressure in them for driving. Hope this helps a little.