• Complete Pacbrake heavy duty air spring kit with brackets and air lines for GMC Sierra SKU HP10340-J
  • Pacbrake Alpha HD Pro rear air suspension kit for 19-26 GM 1500 trucks SKU HP10340-J
  • Pacbrake Alpha HD Pro rear air suspension kit for 19-26 GM 1500 trucks SKU HP10340-J
  • A product compatibility graphic. The graphic features the 'BAcBrake Alpha HD' branding at the top, text detailing vehicle fitment for a 2019-2026 Silverado/Sierra 1500HD, and a photo of a blue pickup truck driving on a muddy road on the bottom right.
  • Promotional graphic for Pacbrake by 41 Wheels, featuring a white pickup truck towing a white trailer on a snowy road. The top of the graphic has a diamond-plate style banner with the 41 Wheels logo on the left and the Pacbrake brand name on the right, with a block of descriptive text in the center.
  • Promotional graphic for Impac Brake Alpha HD Air Suspension., featuring a list of benefits on a blue background with dog sled imagery and three illustrative icons showing proper vehicle suspension alignment.
  • Promotional graphic for PAC Brake Alpha HD air springs, featuring a central blue text panel with product information over a desert scene, flanked by close-up views of black and blue air spring components on a diamond plate background.
  • Promotional graphic for PAC Brake Alpha Air Suspension, showing a close-up of a suspension component with callouts pointing to aluminum end caps, support wires, rubber, and powder-coated brackets on a blue and black background.
  • A large brown cardboard box for PACBRAKE, featuring the black wolf head logo and product text, photographed on a white background with a faint shadow.
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Pacbrake

Pacbrake Alpha HD Pro Rear Air Springs | 19-26 GM 1500

Pacbrake Alpha HD Pro Rear Air Springs | 19-26 GM 1500

🚚 Free Shipping Across US & Canada For Orders +$200 📦 Customs Duties Included — No Surprises🇨🇦 Ships from Canada🛡️ 1-Year Warranty↺ Easy Returns 👥 Ships in 1-3 days🍁 North America Based Support
$689.00 CAD
$799.00 CAD $689.00 CAD
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Pacbrake Alpha HD Pro Rear Air Suspension Springs Kit for 2019-2026 Chevy Silverado & GMC Sierra 1500

Eliminate rear-end sag, headlights pointing upward, and uncontrolled body roll during heavy towing with the Pacbrake Alpha HD Pro Rear Air Suspension Kit. Carrying heavy payload or towing heavy trailers strains stock rear leaf springs, leading to severe bottoming out, poor braking stability, and accelerated tire wear.

Built using heavy-duty double-bellows air springs featuring anodized aluminum end caps, this air bag kit provides up to 5,000 lbs of load-leveling capacity. According to SEMA chassis load engineering benchmarks, supplemental air suspension systems absorb high-frequency axle vibrations while maintaining proper front wheel alignment and steering traction under maximum load. Built to endure freezing sub-zero conditions, extreme road salt spray, and rough off-road washboards, Pacbrake Alpha HD springs deliver independent left-and-right pneumatic leveling to stabilize off-center cargo with complete confidence.

Technical Specifications

Specification Details
Load Leveling Capacity Up to 5,000 lbs (2,268 kg) Dual Leveling
Air Spring Style Double-Bellow Heavy Duty Reinforced Rubber
End Cap Construction Anodized Aluminum End Caps
Bracket Material Precision Laser-Cut Powder-Coated Steel
Operating Pressure Range 5 PSI Minimum to 100 PSI Maximum
Fifth-Wheel Compatibility Fits Vehicles Equipped with 5th Wheel Frame Brackets
Country of Origin Made in Canada
Manufacturer Part Number HP10340-J

Vehicle Fitment

  • Chevrolet Silverado 1500: 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026
  • GMC Sierra 1500: 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026
  • Bed Lengths: Compatible with all short, standard, and long box configurations.
  • Lifted Trim Note: Models with factory or aftermarket lift kits (such as Trail Boss and AT4) require a 2" air spring spacer kit for proper fitment.
  • Fitment Exclusions: NOT compatible with models equipped with Adaptive Ride Control (ARC) or MagneRide electronic suspension systems.

Installation Notes

  • Direct bolt-on installation using vehicle-specific brackets; no drilling into the main frame rails required.
  • Compatible with under-bed and in-bed 5th wheel hitch bracket systems mounted along the frame.
  • Includes complete air line tubing, Schrader inflation valves, mounting hardware, and detailed assembly instructions.
  • Always maintain a minimum of 5 PSI in the air springs at all times to prevent internal bag chaffing or pinching.

Frequently Asked Questions

Does this kit increase my vehicle's Gross Vehicle Weight Rating (GVWR)?

No, air springs provide load leveling support to prevent sagging and improve handling under heavy loads, but they do not increase your truck's factory GVWR capacity.

Can I install these air springs on my Silverado Trail Boss or GMC Sierra AT4?

Yes, but because Trail Boss and AT4 models come factory lifted from the dealership, you must install an additional 2-inch spacer block to ensure correct air spring height.

SKU: HP10340-J

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