Pacbrake
Pacbrake Alpha SD Rear Air Springs | 07-18 GM 1500
Pacbrake Alpha SD Rear Air Springs | 07-18 GM 1500
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Pacbrake Alpha SD Rear Air Suspension Helper Springs Kit for 2007-2018 Chevy Silverado & GMC Sierra 1500
Eliminate rear-end sag, trailer sway, and harsh bottoming out when hauling heavy cargo with the Pacbrake Alpha SD Rear Air Suspension Kit. Transporting heavy bed payloads, slide-in campers, or high-tongue-weight trailers places immense stress on stock rear leaf springs, leading to compromised front-wheel steering control and extended braking distances. Engineered with heavy-duty double-bellows air springs featuring durable composite end caps, this air bag kit delivers up to 5,000 lbs of load-leveling assistance.
According to SEMA chassis engineering standards, supplemental air helper springs maintain vehicle levelness, keeping headlights properly aimed while maximizing front tire contact patch under load. Built to withstand freeze-thaw cycles, sub-zero road salt spray, and rough off-road washboards, Pacbrake Alpha SD springs feature independent pneumatic inflation lines to easily 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 Material | Laser-Cut Precision Steel with Powder-Coated Finish |
| Operating Pressure Range | 5 PSI Minimum to 100 PSI Maximum |
| Country of Origin | Made in Canada |
| Manufacturer Part Number | HP10144 |
Vehicle Fitment
- Chevrolet Silverado 1500: 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018
- GMC Sierra 1500: 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018
- Bed Length Fitment: Fits Short Box (5.8' / 69.3") and Standard Box (6.5' / 78.7") models ONLY.
- Fitment Exclusions: NOT compatible with Long Box (8.0' / 97.6") beds. NOT compatible with models equipped with MagneRide electronic suspension systems. Excludes 2007 Classic edition old body style trucks.
Installation Notes
- Direct bolt-on installation using vehicle-specific mounting brackets; no frame drilling required.
- Includes complete inflation kit with airlines, Schrader valves, steel mounting hardware, and installation guide.
- Always maintain a minimum operating pressure of 5 PSI in the air springs at all times to prevent internal bag chafing or pinching.
- Independent left and right air fill lines allow custom inflation pressures to compensate for asymmetrical cargo weight.
Frequently Asked Questions
Will this kit fit an 8-foot long bed truck?
No, this kit is specifically engineered for short (5.8') and standard (6.5') bed configurations. Long bed 8.0' models require a different frame mounting bracket kit.
Can I adjust each air spring independently?
Yes, the system includes dual inflation lines so you can inflate each air bag to different pressures to level off-center payloads.
SKU: HP10144
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