PacBrake HP10373-X Alpha XD 7500 Air Spring Suspension Kit | 2018-2025 GM Chevrolet Silverado 4500HD/5500HD/6500HD

Features:

• 7500 lb load-leveling capacity per kit
• Eliminates sag, sway, and bottoming out
• One-piece aluminum end caps for strength
• Double convoluted 7" air spring design
• Includes corrosion-resistant roll plates
• Laser-cut, powder-coated steel brackets
• Grade 5 plated mounting hardware included
• Bolt-on installation with no drilling required
• Improves ride quality under heavy load
• Evenly distributes weight to all tires
• Compatible with Silverado 4500–6500HD
• Backed by Pacbrake’s lifetime warranty

Premium Air Spring Kit for GM 4500HD-6500HD

When your truck is built for serious work, your suspension better be able to keep up. That’s where the PacBrake Alpha XD 7500 Air Spring Suspension Kit steps in. Designed for the Silverado 4500HD, 5500HD, and 6500HD platforms, this heavy-duty system is made to level out your ride and take the stress off your factory suspension, especially when you’re loaded down or hauling daily. Whether it’s a full payload, a fifth-wheel trailer, or gear stacked high, this kit helps you regain control, reduce rear-end sag, and eliminate that “bottoming out” feeling. With a massive 7-inch double-convoluted air spring and a 7,500 lb capacity per pair, this setup delivers serious load support without compromising ride comfort. You’ll immediately notice better handling and a more confident stance, whether you’re rolling through city traffic or crawling up steep grades.

Durable Construction & Design

What really sets PacBrake apart is the construction. These are the only air springs on the market with one-piece aluminum end caps, no plastic to crack, no corners cut. The springs also include 20 internal support wires for added strength, and they’re paired with laser-cut, powder-coated brackets that bolt right up without fuss. All necessary hardware, airline, and corrosion-resistant roll plates are included for a straightforward install.

Fitment: 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025 GM Chevy Silverado 4500HD/5500HD/6500HD

Notes:

• Does not fit trucks with factory air suspension.
• Not compatible with GR4 or FU7 suspension codes on 2WD models.
• Will not work with Curt fifth-wheel mounting plate kits.
• One-piece aluminum end caps prevent cracking in cold weather.
• Air springs include 20 internal support wires for added strength.
• Backed by a 60-day money-back guarantee from Pacbrake.
• Lifetime warranty covers defects in materials and workmanship.
• Rated to support up to 7,500 lbs per kit, or 3,750 lbs per side.
• Total kit weight is approximately 61 pounds when shipped.
• May include a Prop 65 warning for California residents.