This SES Suspension Upgrade fits the rear suspension of a Chevrolet Silverado 2500/3500 & GMC Sierra 2500/3500 truck. 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.
This SES Suspension Upgrade replaces the jounce stop on the frame. Its unique design ensures superb ride quality loaded or unloaded. (There should be a 1/2" to 1-1/2" gap between rubber spring and axle to ensure unloaded ride quality.) Unlike other auxiliary spring systems, the SES Suspension Upgrade guarantees the best of both worlds.
5.0Easy to install and less than a full air bag setup
Very easy to install and handles the load of our 5th wheel much better. The truck does not squat as much and bucks less on the highway.
from Phoenix AZ
5.0Easy to install and works with load
Put in a 2018 2500 Silverado to pull a 7k trailer. Works well and really didn't notice any difference from stock when empty. Hitting speed bumps is definitely harsh but so what. Cheap and easy over airbags.
By JBO Sports
from Fall City WA
5.0Timbrens on 2500HD
Watch out when crossing railroad tracks unloaded at medium speeds, as these will buck you hard when they rebound off of the axle carriers!