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When you hook up a trailer or load the bed heavy, sag in the rear suspension can throw off your steering, braking, and headlight aim. The Air Lift LoadLifter 5000 Ultimate air springs add up to 5,000 lbs of load-leveling capacity to keep your ride level and steady. By distributing weight evenly to all four wheels, they cut down on squat, bottoming out, and sway so the truck feels solid and in control under load.
Not every haul is the same, and that’s where adjustable air pressure makes all the difference. These air springs can be tuned from 5 psi up to 100 psi for the exact support you need. Pump them up for towing or hauling, then drop the pressure back down for everyday driving. Each spring can be inflated independently for side-to-side leveling when loads are uneven. Manual inflation valves are included for simple setup and pressure checks whenever you need them.
Each bag has an internal urethane jounce spring that steps in when air pressure is low or a big bump hits. The jounce springs smooth out rough roads, reduce sway in corners, and help prevent bottoming out. If air pressure drops completely, they act as a fail-safe to protect your suspension until you can top off the bags again. Because they engage progressively—the more weight you add, the stiffer they get—you’ll notice a smooth transition from comfort to control as loads change.
These air springs are made with 2-ply fabric-reinforced rubber and corrosion-proof Zytel nylon endcaps that are lighter and stronger than steel. Air Lift’s exclusive roll plates guard the bags from rubbing against moving parts and boost their load capacity. The urethane internal jounces need no maintenance and handle both hot and cold conditions without issue. With high-strength brackets, hardware, and a lifetime warranty behind them, this setup is built for years of towing and hauling.
The kit comes with mounting brackets, hardware, air lines, and manual inflation valves—everything you need for installation using standard tools. The valves are typically mounted on the bumper for easy access. If you want hands-free control, you can add an on-board compressor system later; the springs are compatible with both wired and wireless setups for adjusting air pressure right from the driver’s seat or smartphone.
Alternate Instructions
Customer Satisfaction Score:
88% were satisfied with this product
12% of customers were not satisfied
Ratings & Reviews
Perfect fit
A+ ride
Worked wonderful, easy install.
Mark
7/1/2022
Great, exactly what I needed.
Great product. Easy install and it helps when pulling the travel trailer.
Good quality product. The install instructions are not totally clear. Looked at the video to help with the install.
Wrong air lift kit sent back and reorde red
I called didn’t have to wait long on the phone and she answered my question said you need this kit and she was very pleasant. Thank you.
easy install works great pulling my cam per
I had these installed to help with towing a 35 foot camper. Prior to the air bags I would get sway at 60 65. Last trip a had it up to 75 for a bit no sway.
Videos on you tube were a big help with the installation
2026 Trail Boss and 88388 DON'T DO IT! The resting height of the bag and brackets is 11", fully compressed to jounce bumper 8.75", fully extended 13". The Trail Boss distance from frame to axle pad is 9" (w/o bump stop & OEM spacer). Stock axle travel distance up is about 2.5"-3"(unloaded box). Installing kit 88388 on a Trail Boss will be riding on the jounce bumper for every bump in the road. If you inflate bags to 50% and ride 2" higher in the back, then one would have 2" of axle travel for bumps. DON'T DO IT!
Mike L.
1/28/2026
I'm sorry to hear that, Kurt. I see that you've been working with our Customer Service folks, and that they've providing a shipping label so you can return the bags that don't fit. If I can help further, please let me know.
Had them on for 2 days, looked like I lifted the back of my truck with empty bags. Took them off and have been in box since
awesome company each trailer makes it e asy
Unfortunately these take up most of the wheel travel between the axle and leaf springs and cause bouncing or bottoming. When I run low pressure, I bounce off the jounce supports which is truly jarring. To avoid that, I have to drive with the back of the truck lifted, which gives it a very bouncy ride when unloaded. I wouldn’t buy these with internal bounce bumpers again.
VERY GOOD FIRST IMPRESSION!
I have a 2020 Sierra 1500 AT4. I have the back loaded with a DECKED drawer system full of tools, plus all my gear in tubs for investigating fire scenes. My amazing pickup was nearly riding the bump stops all day. On a bumpy road, it was pretty taxing. Off-road was brutal. After some research I found this kit to fit my AT4 truck, part #88388.
You will need tall jack stands for this project. We ended up bracing ours on the rear leaf spring perches due to exhaust routing.
This is a brand new install, so time will tell as to how it holds up, but I have high expectations. This kit comes with paper instructions that are pretty spot-on. The pictures were helpful, and the instructions are detailed enough for a novice to understand. With one extra set of hands, I installed this kit in about 2 hours. I mounted the single fill valve in my gas-fill area, hidden behind the fuel lid. No bending over to add or release pressure.
After the install, I ran the pressure up to 40 psi as recommended. I got about 2 1/2” of lift out of that. I pulled a trailer home from the shop, and my truck rode like brand new. For my daily cargo, I think 40 pounds is just about perfect. And my tailgate is back at belly button height again. My headlights are shining where they should be shining. My bottomed-out ride is now compliant and comfortable.
The parts seem to be quality, and I had zero fitment issues. The only specialty tool was the T40 TORX tip for removing brackets from the axle front. You need it before you start. This kit is an easy install with a basic 3/8” socket set, a couple box end wrenches, and a couple other basic hand tools. This project should not scare too many people away.
Pro tip: You may think you can do it without taking off the tires. DON’T!! You’ll be pissed off at your truck and anyone nearby. The time savings will be worth it.
Also, the parking brake is on the back axle. Chock the front tires and/or put your rig in 4 low before lifting the back end.
Gwendolyn Y.
5/15/2025
Wow, Brian. Thanks so much for your in depth review and experience with installing the air bags. You gave some really solid tips and advice, especially the one about removing the tires. How's the ride now when you're off road?
Gwendolyn Y.
5/16/2025
Great instructions and easy installation! Fit perfectly! Loaded my tractor to test them out and they completely leveled my sagging truck with 42psi.
Brooke M.
3/24/2025
Happy to hear these are getting the job done! Your set up looks great, and man! What a beautiful picture. Blue, sunny skies, green grass, a cool breeze (I'd wager) perfect day to hitch up the trailer and get some work done!
Matt
3/24/2026
Been great! I really don’t like the internal jounce stops though. When you are unloaded and running lower bag pressure, a dip or bump will hit the bump stops really hard and jar your passengers in the backseat. It’s almost too uncomfortable to ride in the backseat now. As for the loaded and high pressure performance it’s great! Great handling and no sag at all when towing.
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Brian B.
3/26/2026
After about 3 weeks I called the manufacture for tech support because the track was riding so ruff. They sent me a different kit that was supposed to be better suited for my needs. After two weeks I removed the air bags and threw them away. The truck road so ruff when not towing that I did not want to drive it anymore. This is a 12-ton truck that rode ruffer with the air bags then any 1-ton truck that I had ever ridden in. To recap I pulled them off and threw them away and got a weight distribution hitch.