GMR35HDM – Rear Axle SES Suspension Upgrade

GMR35HDM - Rear Axle SES Suspension Upgrade

This SES Suspension Upgrade fits the rear suspension of a Chevrolet 3500 & GMC C3500 cab & chassis truck. Each laser cut piece of steel is precision bent and powder-coated to ensure a quality fit. We’ve engineered our hollow rubber springs to deliver a progressive spring rate.   In other words, the more weight that pushes down on the rubber springs the harder they work to prevent rear end sag. Whether you’re pulling a trailer or carrying a heavy load in the bed of your truck, our hollow rubber springs adjust automatically to keep the vehicle level at all times.

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Product Features

  • Eliminate Vehicle Squatting & Sagging
  • Cushion Road Shocks
  • Improve Handling
  • Satisfaction Guarantee
  • Lifetime Warranty

Customer Reviews


"The Timbren system is the answer for rear end sag and soft handling! My 35ft 5th wheel handles much better, and I recommend Timbren without reservation."

- Larry V. - SD

“Timbren's work amazing! Absolutely as good or even better than air bags! Did it myself and only had time to drink 2 beer doing it! Easy install. Thanks for the advice. Simple yet very effective.”

Jonny K - NB

Fitment Checklist


Chevrolet C3500(HD) Cab Chassis
1991-2002
All Models With Leaf Spring Front Suspension
Chevrolet Silverado 3500 Cab Chassis
2001-2004
All Models With Leaf Spring Front Suspension
GMC C3500(HD) Cab Chassis
1991-2002
All Models With Leaf Spring Front Suspension
GMC Sierra 3500 Cab Chassis
2001-2004
All Models With Leaf Spring Front Suspension

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