Timbren SES Rear Suspension Enhancement System for select 2011-2026 Chevrolet Silverado and GMC Sierra 2500 HD/3500 HD (GMRTT35D)

Fits select 2011-2026 Chevrolet Silverado 2500 HD/3500 HD and GMC Sierra 2500 HD/3500 HD.

The Timbren SES (Suspension Enhancement System) GMRTT35D is designed to stabilize your heavy-duty truck under load while maintaining a smooth ride. This kit utilizes Aeon® hollow rubber springs that feature a progressive spring rate, meaning they automatically adjust to help eliminate vehicle squatting, sagging, and trailer sway. Unlike air bag systems, these cushions require no air lines, fittings, or ongoing maintenance.

This bolt-on upgrade replaces the factory bump stops, providing a significant increase in roll stability and load-carrying capacity without compromising empty ride quality. Installation is straightforward and requires no drilling, typically completed in minutes with basic hand tools.

• Manufacturer Part Number: GMRTT35D
• Eliminates rear end sag and squat under heavy loads
• Absorbs road shocks and improves overall handling
• Maintenance-free design with no air lines or leaks to worry about
• Direct bolt-on installation into factory mounting points
• High-quality progressive rate rubber springs
• Includes all necessary mounting hardware
• Lifetime Warranty