GMRC55 – Rear Axle SES Suspension Upgrade

GMRC55 - Rear Axle SES Suspension Upgrade

This SES Suspension Upgrade can be adapted to fit the rear suspension of most GM Kodiak/Topkick medium & heavy-duty trucks equipped with leaf springs. 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, and help stabilize the load.

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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 C4500 Kodiak
2003-2009
2/4WD
Chevrolet C5500 Kodiak
2003-2009
2/4WD
Chevrolet C60
1997-2002
2/4WD
Chevrolet C60 Kodiak
1991-1996
2/4WD
Chevrolet C6500 Kodiak
2003-2009
2/4WD
Chevrolet C70 Kodiak
1991-1996
2/4WD
Chevrolet C7500 Kodiak
2003-2009
2/4WD
Chevrolet T5500
2003-2009
2/4WD
Chevrolet T6500
2003-2009
2/4WD
Chevrolet T7500
2003-2009
2/4WD
Chevrolet T8500
2003-2009
2/4WD
GMC C6000 Topkick
1991-1996
2/4WD
GMC C6500 Topkick
2003-2009
2/4WD
GMC C7000 Topkick
1991-1996
2/4WD
GMC C7500 Topkick
2003-2009
2/4WD
GMC T5500
2003-2009
2/4WD
GMC T6500
2003-2009
2/4WD
GMC T7500
2003-2009
2/4WD
GMC T8500
2003-2009
2/4WD
GMC Topkick
2003-2009
2/4WD

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