Timbren SES Rear Suspension Enhancement System for 1999-2010 Chevrolet Silverado & GMC Sierra 1500/2500 (GMRCK25S)

Fits select 1999-2010 Chevrolet Silverado 1500, 1500 HD, 2500, 2500 HD and GMC Sierra 1500, 1500 HD, 2500, 2500 HD trucks.

The Timbren SES (Suspension Enhancement System) GMRCK25S is engineered to eliminate vehicle squatting, sagging, and trailer sway under heavy loads. Unlike air helper springs, this system utilizes Aeon hollow rubber springs that require no air lines, no fittings, and zero maintenance. The progressive spring rate of the rubber cushions automatically adjusts to uneven loads and road conditions, providing a smoother ride when loaded while maintaining factory ride quality when empty.

Installation is straightforward and requires no drilling or routing of air lines. This kit bolts directly to factory mounting points using basic hand tools, making it a reliable solution for improving towing stability and hauling capacity without the complexity of traditional air suspension systems.

• Manufacturer Part Number: GMRCK25S
• Eliminates rear-end sag and improves vehicle handling under load
• Aeon hollow rubber springs absorb road shock and dampen vibrations
• Maintenance-free design with no air lines to leak or fittings to fail
• Easy bolt-on installation with no drilling required
• Includes all necessary mounting hardware and instructions
• Backed by a Lifetime Warranty