Pacbrake Alpha HD Pro Air Bag Suspension Kit w/ Internal Jounces - Rear Axle - 5,000 lbs
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2017 GMC Acadia
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2017 GMC Acadia
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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 using vehicle-specific upper brackets and axle straps below, with the emergency-brake cable temporarily moved and the brake-line hardware repositioned to provide the clearance the springs need. Once everything is positioned, aligned, and torqued, you'll reconnect the emergency-brake cable, then route the braided stainless steel air lines with enough clearance and slack for suspension movement 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 brief look together at this Pacbrake Alpha HD Pro Rear Axle Air Bag Suspension Kit with internal jounce bumpers and stainless steel hardware. Now, this kit is designed to fit your 2022 to current Toyota Tundra, both the 2-wheel and 4-wheel drive models. And on custom fit parts such as this kit, I do recommend taking advantage of our Vehicle Fit Guide here at etrailer. Just pop in the year, make, and model of your vehicle, and our Fit Guide will confirm if this kit will work for you, or if we have something comparable that will work for you.
So, as you no doubt know, when the load gets heavy, your truck is going to need more than just your factory rear suspension hanging on for dear life. These airbags add up to 5,000 pounds of rear axle support, and these are going to keep your truck level and steady, even when your trailer is loaded, your bed is packed, and the miles are long. So what that means for you is no more rear end sagging throwing off your braking or steering, or your headlights pointing up into the sky. Now, bottoming out just doesn't feel rough, it can actually wreck your airbags. And so that's why these bags include jounce bumpers inside of each bag, as you can see there on a cutaway photo that I have there on your screen.
So even with no air pressure, your suspension has a built-in safety net. You're going to be able to safely run at 0 psi when unloaded, which means no harsh rebound, just that smooth factory style ride. Now, this kit, as you can see here, includes these stainless steel braided air lines, which are going to be more durable and resistant to wear compared to standard rubber lines. And you're also going to get these stainless steel roll plates, which are going to help protect the airbags, along with the Schrader valves that I had the lines connected to. So you're going to be able to easily inflate or adjust the air pressure using a standard air source.
Now, on your screen, I've got a picture there showing you what you're actually going to be getting. The top picture there is the original hardware. You are going to get that, but this also includes that stainless steel upgrade kit with the hardware. So I just wanted to give you an idea of what to expect when you get this. You're going to get all the hardware that you need to not only install the stainless steel hardware to the bags and the brackets, but the brackets to your vehicle as well.
So the stainless steel components are really a big upgrade because they're built to last in harsh conditions. Stainless steel resists rust and corrosion, so it's going to be much, much better than those standard materials, and it's also stronger and less prone to damage, so you're going to be less likely to deal with leaks or wear over time. But as you know, each haul's going to be different. That's why these air springs give you full control over your ride height and firmness with adjustable air pressure from 5 to 100 psi. So if you're hauling a fifth-wheel or a full bed of gravel, you'll just crank up the pressure. If you're unloaded and headed home, just drop the pressure back down for a softer ride. Now, these springs are built with 1-inch thick corrosion resistant end caps and reinforced with 20 internal support wires for maximum strength under that load. Pacbrake is my favorite airbag system that we carry here at etrailer. Everything seems to be very premium, especially the bags. You have these precision laser-cut brackets. They're designed to bolt cleanly to your truck's existing mounting points without welding or drilling to the frame. They're powder coated, so the fit and finish is great from Pacbrake overall. The load support, again, is up to 5,000 pounds, but just remember that these air springs don't actually increase your truck's weight carrying capacity, so you want to make sure that you're not exceeding your manufacturer's recommended weight limits. If you think you need help with installation, we have you covered. On this product page, we 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 to do the install for you. But if you have any other questions, don't hesitate to reach out. We do want to make sure that you're getting exactly what you need. Well, again, my name's Andy. Thank you for joining me.
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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.