Arnott BAG-CH251123 Air Suspension Helper Spring Kit - Rear

Rear Air Helper Spring Kit for Heavy-Duty Towing

The Arnott BAG-CH251123 air suspension helper spring kit adds adjustable rear support for heavy-duty Chevrolet Silverado and GMC Sierra trucks. It uses air pressure to help manage load changes, improve ride control, and reduce rear-end sag during towing or hauling.

Key Features

• Rear air helper spring kit for load-leveling support
• Rubber bellows with black finish
• Mounting hardware included
• 4 mounting studs per bellows
• Reduces axle-to-frame contact that can lead to bottoming out
• Helps maintain steering control and braking effectiveness during weight shift events
• Compatible with in-bed hitch applications on listed trucks

Product Details

Arnott BAG-CH251123 is an air suspension helper spring kit built for rear suspension support on 2011-2025 Chevrolet Silverado 2500 HD, 2011-2025 Chevrolet Silverado 3500 HD, 2011-2025 GMC Sierra 2500 HD, 2011-2025 GMC Sierra 3500 HD, 2011-2018 Chevrolet Silverado 2500, 2015-2018 Chevrolet Silverado 3500, and 2011-2013 Chevrolet Silverado 3500. The rubber bellows are designed to add adjustable load-bearing support while reducing inner-leaf friction, which helps the suspension respond more consistently under changing cargo or trailer weight. This part number, BAG-CH251123, is a direct fit solution for rear suspension load support on these Chevrolet Silverado and GMC Sierra applications.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Rear suspension sag when carrying heavy cargo
• Bottoming out over bumps, dips, or driveway transitions
• Reduced stability during towing or hauling
• Steering and braking changes caused by rear weight shift
• Excessive axle-to-frame contact under load

Installation Notes

Mounting hardware is included. This kit installs at the rear and is listed as compatible with in-bed hitch setups on the supported Chevrolet Silverado and GMC Sierra models. Verify vehicle year, model, and rear suspension configuration before installation. BAG-CH251123 uses rubber bellows and does not include bushings, springs, shocks, sway bars, or a reservoir.

Quality Assurance

Arnott supplies suspension components for load support and ride control applications. BAG-CH251123 is built as a regular-grade helper air spring kit with materials and hardware specified for the listed fitments.