GMFC15 – Front Axle SES Suspension Upgrade

GMFC15 - Front Axle SES Suspension Upgrade

This SES Suspension Upgrade fits the front suspension of a Chevrolet Silverado 1500, 2500, 3500  GMC Sierra 1500, 2500 3500 pickup truck and cab chassis (see below for full list of applications). 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 (weight from a snowplow or heavy aftermarket accessories – such as a steel bumper) the harder they work to prevent front-end sag.

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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 K-Blazer (Full Size)
1973-1991
2WD Only
Chevrolet C10 Pickup
1963-1987
2WD Only
Chevrolet C20 Pickup
1963-1987
2WD Only
Chevrolet C30 Pickup
1968-1987
2WD Only
Chevrolet C30 Cab Chassis
1973-1989
2WD Only
Chevrolet R10 Pickup
1987
2WD Only
Chevrolet R20 Pickup
1987
2WD Only
Chevrolet R30 Pickup
1987
2WD Only
GMC C15 Suburban
1975-1978
2WD Only
GMC C15/C1500 Suburban
1973-1974
2WD Only
GMC C1500 Suburban
1979-1986
2WD Only
GMC C25 Suburban
1975-1978
2WD Only
GMC C2500 Suburban
1979-1986
2WD Only
GMC C35/C3500 Cab Chassis
1973-1989
2WD Only
GMC Jimmy
1973-1984
2WD Only
GMC R1500 Suburban
1987-1991
2WD Only
GMC R2500 Suburban
1987-1991
2WD Only

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