To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.
Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.
Error submitting comment. Please try again momentarily.
Heavy trailer, camper, or bed loads can leave your truck squatting and less controlled. These air springs add up to 5,000 lbs of leveling support to reduce sag, sway, and bottoming, while internal jounces let you run 0 psi unloaded.
Typical Alpha HD Pro installation shown. Vehicle-specific brackets vary by application.
When trailer weight, a slide-in camper, or a heavy bed load settles your truck onto its rear suspension, squat and extra body movement can make the truck feel less controlled. The two adjustable rear air springs add supplemental support to help reduce sag, sway, and bottoming while letting you tune the suspension to the weight you're carrying. With up to 5,000 lbs of load-leveling capacity, you can add only the pressure the load calls for instead of treating maximum pressure as the default. Your truck can sit closer to level and remain more controlled while carrying or towing substantial weight.
A truck that tows one day and runs empty the next doesn't need the same rear-suspension support all the time. Internal jounce bumpers let you add air when your trailer, camper, or cargo is aboard, then reduce the air springs to 0 psi once that load comes off. Those internal jounces also protect the air springs against bottoming when suspension travel is used up. You get the support your truck needs under weight without having to keep air in the bags simply to protect them when you're driving empty.
Suspension hardware lives where road spray, dirt, and weather reach it, so material choices matter underneath your truck. This kit uses braided stainless steel air lines along with stainless steel fittings, Schrader valves, roll plates, and mounting hardware to add corrosion resistance throughout key parts of the system. That extra durability is focused where it matters, helping the hardware you rely on for load support and pressure adjustment stand up to the environment beneath a working truck.
You'll start by measuring your truck's stock ride height and checking tire-to-frame clearance before removing the factory jounce bumpers, with rear-wheel removal optional if you want more working room. The air spring assemblies mount between the frame and axle, with some brake-line and emergency-brake hardware repositioned for clearance before the brackets are aligned and secured. Trucks without a fifth-wheel hitch use upper U-bolts around the frame, while trucks with a fifth-wheel hitch require drilling mounting holes for the upper brackets. Once everything is aligned and torqued, you'll install the passenger-side exhaust heat shield, then route the braided stainless steel air lines before mounting the Schrader valves where they're easy to reach. Adding air bags is a job experienced DIYers can handle, but if you would rather leave it to a professional, we can help you find an installer near you.
The included Schrader valves give you everything you need to adjust the air springs manually, but pulling out an external compressor can get old if your towing or hauling setup changes frequently. You can add a Pacbrake Bravo Wireless Air Control Kit (sold separately) to adjust pressure from your phone, check live pressure, and save presets for loads you come back to regularly. Also, you'll be able to choose between filling both air springs together or controlling them independently when the load isn't even side to side. It's an optional upgrade, but one that makes the adjustable part of an air-spring system much easier to use regularly. And it's not the only solution available. There are a variety of compressor options from Pacbrake that might be the perfect fit for your setup.
Alternate Instructions
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hi, everybody. Andy here with etrailer. Let's take a quick look at this Pacbrake Alpha HD Pro Rear Axle Airbag Suspension kit with internal jounce bumpers and stainless steel hardware. Now this has been designed to fit your 2011 to 2019 Chevrolet Silverado and GMC Sierra, the 2500 and the 3500, either the two wheel or four wheel drive models. Now it is important that you do go through our vehicle fit guide here at etrailer and just answer the questions that it has for you, year, make, and model, and input that data. And our fit guide will confirm that this will work for you.
And if it doesn't, it'll give you something that will be comparable to what you are looking for. But as you know, when the load gets heavy, your truck is gonna need more than just your rear springs hanging on for dear life. That's where these airbags come in. They're gonna give you up to 5,000 pounds of rear axle support, keeping your truck level and steady even when your trailer is loaded or your bed is packed and miles are long. So what that means for you is no more rear end sag throwing off your braking and steering or your headlights pointing straight up into the sky.
Now, as you probably also know, bottoming out doesn't just feel rough, that can actually wreck your airbags. That's why this system includes jounce bumpers inside of each bag. And on your screen, I have an example of a cutaway there showing you what that looks like inside one of the airbags there. So even with no air pressure, your suspension has a built-in safety net. You're gonna be able to safely run at zero PSI when unloaded, which means no harsh rebound, just that smooth factory style ride.
So this kit includes these stainless steel braided air lines, which are gonna be obviously more durable and resistant to wear compared to standard rubber lines. You're also gonna get these stainless steel roll plates, which are gonna help protect the airbags along with Schrader valves. So you're gonna be able to easily inflate or adjust the air pressure using a standard air source. Now on your screen I'm showing you all the hardware you're gonna get. The top picture there is going to be the standard hardware with the brackets that I kind of have loosely connected to our airbags here on the table.
But the bottom picture you're also going to get, that is the stainless steel upgrade hardware. So you're not gonna use all of this hardware and I just wanted you to have a pretty good idea of what you we inchesre gonna get since I don't have the room on my table to lay all this out. But as you know, the stainless steel, it's gonna be a big upgrade because they're built to last those harsher conditions. Stainless steel resists rust and corrosion much better than standard materials. It's also stronger and less prone to damage. So you're gonna be less likely to deal with leaks or wear over time. Now these airbags are gonna give you full height control and firmness control with adjustable air pressure from 5 to 100 PSI. So for example, if you're hauling a fifth wheel or a full bed of gravel, just crank up the pressure. If you're unloaded and heading home, you can drop it back down for a softer ride. These springs are built with one inch thick corrosion resistant end caps. They're reinforced with 20 internal support wires for maximum strength under that load. These brackets are powder coated. They are actually precision laser cut brackets, so they're designed to bolt cleanly to your truck's existing mounting points without welding or drilling to your frame. So again, this is gonna give you up to 5,000 pounds of load leveling support, but just be aware of the fact that airbags do not actually increase your truck's weight carrying capacity. So you do wanna make sure that you're not exceeding your manufacturer's recommended weight limits. One final note, if you would like help with the installation, on this product page we do have a link underneath the photo section. If you click that link, that's gonna take you to our installer locator, answer the questions that it has for you and that locator will find an installer that etrailer has partnered with in your area to do the install for you. Well, if you have any other questions, don't hesitate to reach out. We do wanna make sure that you're getting exactly what you need. Again, my name's Andy. Thank you for joining me.
Ratings & Reviews
Info for this part was:
At etrailer we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.
Kate F.
6/25/2026
I am very sorry to hear that these did not work for you John. I see on both the Pacbrake site and our site they are listed to not work with the Adaptive Ride Control, do you have that on your Silverado 1500? I am trying to get to the bottom of this so I can get the information corrected on both sites if needed.