• Complete Pacbrake heavy duty air helper spring kit with mounting brackets for Sierra 1500 SKU HP10340
  • Pacbrake Alpha HD rear air suspension helper springs kit for 19-26 GM 1500 SKU HP10340
  • Pacbrake Alpha HD rear air suspension helper springs kit for 19-26 GM 1500 SKU HP10340
  • Pacbrake Alpha HD rear air suspension helper springs kit for 19-26 GM 1500 SKU HP10340
  • A product compatibility graphic. The graphic features the '4HBrake 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. 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 Rear Air Springs | 19-26 GM 1500

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

🚚 Livraison gratuite - USA et Canada - dès 200$ 📦 Droits de douane inclus – aucune surprise🇨🇦 Expédié du Canada🛡️ Garantie 1 an↺ Retours faciles 👥 Expédié en 1 à 3 jours🍁 Support en Amérique du Nord
$539.00 CAD
$749.00 CAD $539.00 CAD
En vente Bientôt disponible
Frais d'expédition calculés à l'étape de paiement.

Pacbrake Alpha HD Rear Air Suspension Helper Springs Kit for 2019-2026 Chevy Silverado & GMC Sierra 1500

Eliminate rear-end sag, dangerous trailer sway, and harsh bottoming out when hauling heavy loads with the Pacbrake Alpha HD Rear Air Suspension Kit. Carrying heavy cargo, slide-in campers, or heavy tongue-weight trailers strains stock rear leaf springs, leading to light front-end steering control and poor braking stability.

Engineered with heavy-duty double-bellows air springs with composite end caps, this air bag kit provides up to 5,000 lbs of load-leveling capacity. According to SEMA chassis engineering standards, air helper springs level the vehicle profile to keep headlights aimed properly and maintain front tire contact patch under maximum payload. Built to handle sub-zero winter temperatures, road salt exposure, and off-road trail chatter, Pacbrake Alpha HD springs allow independent pneumatic inflation to level off-center loads with confidence.

Technical Specifications

Specification Details
Load Leveling Capacity Up to 5,000 lbs (2,268 kg) Dual Leveling
Air Spring Style Double-Bellow Reinforced Rubber
End Cap Construction Ultra-Durable Composite End Caps
Bracket Coating Corrosion-Resistant Black 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

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: Fits short, standard, and long box configurations.
  • Lifted Trim Note: Factory lifted models (such as Trail Boss and AT4) require a 2" air spring spacer block kit for proper geometry.
  • Fitment Exclusions: NOT compatible with models equipped with Adaptive Ride Control (ARC) or MagneRide electronic shock absorbers.

Installation Notes

  • Bolt-on mounting using vehicle-specific hardware; no frame drilling required.
  • Fully compatible with under-bed and in-bed 5th wheel hitch bracket kits attached along frame rails.
  • Includes air lines, manual inflation valves, brackets, and required mounting hardware.
  • Keep a minimum operating pressure of 5 PSI in the air springs at all times to avoid pinch damage.

Frequently Asked Questions

What is the difference between this HP10340 kit and the HP10340-J Pro kit?

The standard Alpha HD HP10340 kit utilizes high-strength reinforced composite end caps on the air bags, whereas the Pro version (HP10340-J) features anodized aluminum end caps. Both provide up to 5,000 lbs of leveling capacity.

Can I adjust the left and right air bags separately?

Yes, the included inflation kit features dual airline paths, allowing you to inflate each air bag individually to level uneven side-to-side cargo loads.

SKU: HP10340

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