Timbren SES Suspension Enhancement System for 1999+ Chevrolet/GMC Silverado/Sierra 1500 - Rear Kit

Unstable loads while towing and hauling don’t just make for an uncomfortable ride. Difficult handling, rear sag, and corner sway create dangerous driving conditions — for you, your passengers, and other vehicles.

Whether you’re towing your RV across the country or hauling hay down the highway, Timbren's Timbren SES kits level your load, making for a safe, controlled ride so smooth, you might forget you’re towing altogether.

How? Timbren's Aeon® rubber springs deliver a progressive spring rate. As load increases, Timbren's rubber springs push back harder, eliminating squat, sway, and roll. After installation, the rubber spring will be in contact with the vehicle’s frame. This contact won’t affect ride quality — you’ll still enjoy a comfortable unloaded ride, too.

What makes Timbren SES kits different from other suspension enhancement systems? Unlike air bags, Timbren's kits require no post-installation maintenance. And unlike other systems, you can install and haul in under 30 minutes, right from your driveway.

TBN-GMRCK15S

Features:

• Reduces sag, sway, and roll when towing and hauling
• Comfortable ride, loaded or unloaded
• DIY installation
• Zero post-installation maintenance

Specs:

• Rated Capacity: 8600 lbs
• Overall kit height = 4.75”

Fitment:

• 2007-2016 Chevrolet/GMC Silverado/Sierra 1500 2WD/4WD
• 1999-2006 Chevrolet/GMC Silverado/Sierra 1500 2WD/4WD 3 Door, Crew Cab, Ext Cab, Reg Cab, Work Truck
• 2017-2018 Chevrolet/GMC Silverado/Sierra 1500 2WD/4WD Leaf Spring Suspension
• 2019 Chevrolet/GMC Silverado/Sierra 1500 2WD/4WD Old Body Style

Notes:

• Even though you’re increasing the spring rate by adding this upgrade, this does not increase the GVWR (Gross Vehicle Weight Rating). Please make sure that the load does not exceed the GVWR set by the manufacturer.

Includes:

• 2x Patented Aeon® SES suspensions (hollow rubber springs)
• 2x Steel mounting disks
• All necessary hardware

TBN-GMRS15

Features:

• Reduces sag, sway, and roll when towing and hauling
• Comfortable ride, loaded or unloaded
• DIY installation
• Zero post-installation maintenance

Specs:

• Rated Capacity: 8,600 lbs

Fitment:

• 2019 Chevrolet/GMC Silverado/Sierra 1500 2WD/4WD New Body Style
• 2020-2025 Chevrolet/GMC Silverado/Sierra 1500 2WD/4WD Custom, Custom Trail Boss, High Country, LT, LT Trail Boss, LTZ, RST, Work Truck, AT4, Base, Denali, Elevation, SLE, SLT,

Notes:

• After installation, there should be a ½” to 1 ½” gap between the rubber spring and vehicle’s frame — meaning you’ll enjoy a comfortable unloaded ride, too.
• Even though you’re increasing the spring rate by adding this upgrade, this does not increase the GVWR (Gross Vehicle Weight Rating). Please make sure that the load does not exceed the GVWR set by the manufacturer.

Includes:

• 2 x Mounting Discs
• 2 x Rubber Spacers
• 2 x Timbren SES suspensions
• All necessary hardware

TBN-GMRTT15S (Severe Service Kit)

Features:

• Made exclusively for top-heavy applications that require maximum stability, like truck campers or salt spreaders
• Reduces sag, sway, and roll when hauling top-heavy loads
• Comfortable unloaded ride
• DIY installation
• Zero post-installation maintenance

Specs:

• Rated Capacity: 7,000 lbs

Fitment:

• 2007-2016 Chevrolet/GMC Silverado/Sierra 1500 2WD/4WD
• 1999-2006 Chevrolet/GMC Silverado/Sierra 1500 2WD/4WD 3 Door, Crew Cab, Ext Cab, Reg Cab, Work Truck
• 2017-2018 Chevrolet/GMC Silverado/Sierra 1500 2WD/4WD Leaf Spring Suspension
• 2019 Chevrolet/GMC Silverado/Sierra 1500 2WD/4WD Old Body Style

Notes:

• After installation, there should be a ½” to 1 ½” gap between the rubber spring and vehicle’s frame — meaning you’ll enjoy a comfortable unloaded ride.
• Even though you’re increasing the spring rate by adding this upgrade, this does not increase the GVWR (Gross Vehicle Weight Rating). Please make sure that the load does not exceed the GVWR set by the manufacturer.

Includes:

• 2 x Rubber spacers
• 2 x Mounting discs
• 2 x Patented Aeon® SES suspensions (hollow rubber springs)
• All necessary hardware