Suspension Rubber Helper Spring Kit

This SES Suspension Upgrade fits the rear suspension of a Chevrolet Silverado 1500/2500/3500 & GMC Sierra 1500/2500/3500 pickup/cab & chassis truck (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 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 ½” to 1 ½” 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.

We recommend Severe Service kits be used with a slide-in camper or salt spreader. In fact, any application that requires maximum stability (reducing roll and sway) calls for a Severe Service upgrade. (Click here for more info on Severe Service recommendations)

This kit is rated at 8000 lbs capacity. 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.

GMRTT35S Installation Instructions

Fitment:

2010 GMC SIERRA 3500 HD CAB & CHASSIS SINGLE REAR WHEEL
2010 GMC SIERRA 3500 ALL MODELS
2010 GMC SIERRA 2500 HD ALL MODELS
2010 GMC SIERRA 2500 ALL MODELS
2010 CHEVROLET SILVERADO 3500 HD CAB & CHASSIS SINGLE REAR WHEEL
2010 CHEVROLET SILVERADO 3500 ALL MODELS
2010 CHEVROLET SILVERADO 2500 HD ALL MODELS
2010 CHEVROLET SILVERADO 2500 ALL MODELS
2009 GMC SIERRA 3500 HD CAB & CHASSIS SINGLE REAR WHEEL
2009 GMC SIERRA 3500 ALL MODELS
2009 GMC SIERRA 2500 HD ALL MODELS
2009 GMC SIERRA 2500 ALL MODELS
2009 CHEVROLET SILVERADO 3500 HD CAB & CHASSIS SINGLE REAR WHEEL
2009 CHEVROLET SILVERADO 3500 ALL MODELS
2009 CHEVROLET SILVERADO 2500 HD ALL MODELS
2009 CHEVROLET SILVERADO 2500 ALL MODELS
2008 GMC SIERRA 3500 HD CAB & CHASSIS SINGLE REAR WHEEL
2008 GMC SIERRA 3500 ALL MODELS
2008 GMC SIERRA 2500 HD ALL MODELS
2008 GMC SIERRA 2500 ALL MODELS
2008 CHEVROLET SILVERADO 3500 HD CAB & CHASSIS SINGLE REAR WHEEL
2008 CHEVROLET SILVERADO 3500 ALL MODELS
2008 CHEVROLET SILVERADO 2500 HD ALL MODELS
2008 CHEVROLET SILVERADO 2500 ALL MODELS
2007 GMC SIERRA 3500 HD CAB & CHASSIS SINGLE REAR WHEEL
2007 GMC SIERRA 3500 ALL MODELS
2007 GMC SIERRA 2500 HD ALL MODELS
2007 GMC SIERRA 2500 ALL MODELS
2007 GMC SIERRA 1500 HD CLASSIC REAR SUSPENSION, 2WD, 4WD, SEVERE SERVICE
2007 GMC SIERRA 1500 CLASSIC REAR SUSPENSION, 2WD, 4WD, SEVERE SERVICE
2007 CHEVROLET SILVERADO 3500 HD CAB & CHASSIS SINGLE REAR WHEEL
2007 CHEVROLET SILVERADO 3500 ALL MODELS
2007 CHEVROLET SILVERADO 2500 HD ALL MODELS
2007 CHEVROLET SILVERADO 2500 ALL MODELS
2007 CHEVROLET SILVERADO 1500 HD CLASSIC REAR SUSPENSION, 2WD, 4WD, SEVERE SERVICE
2007 CHEVROLET SILVERADO 1500 HD REAR SUSPENSION, 2WD, 4WD, SEVERE SERVICE
2007 CHEVROLET SILVERADO 1500 CLASSIC REAR SUSPENSION, 2WD, 4WD, SEVERE SERVICE
2006 GMC SIERRA 3500 HD CAB & CHASSIS SINGLE REAR WHEEL
2006 GMC SIERRA 3500 ALL MODELS
2006 GMC SIERRA 2500 HD ALL MODELS
2006 GMC SIERRA 2500 ALL MODELS
2006 GMC SIERRA 1500 HD REAR SUSPENSION, 2WD, 4WD, SEVERE SERVICE
2006 GMC SIERRA 1500 REAR SUSPENSION, 4WD, SEVERE SERVICE, WORK TRUCK (WT), EXTENDED CAB, CREW CAB
2006 CHEVROLET SILVERADO 3500 HD CAB & CHASSIS SINGLE REAR WHEEL
2006 CHEVROLET SILVERADO 3500 ALL MODELS
2006 CHEVROLET SILVERADO 2500 HD ALL MODELS
2006 CHEVROLET SILVERADO 2500 ALL MODELS
2006 CHEVROLET SILVERADO 1500 HD REAR SUSPENSION, 2WD, 4WD, SEVERE SERVICE
2006 CHEVROLET SILVERADO 1500 REAR SUSPENSION, 4WD, SEVERE SERVICE, WORK TRUCK (WT), EXTENDED CAB, CREW CAB
2005 GMC SIERRA 3500 HD CAB & CHASSIS SINGLE REAR WHEEL
2005 GMC SIERRA 3500 ALL MODELS
2005 GMC SIERRA 2500 HD ALL MODELS
2005 GMC SIERRA 2500 ALL MODELS
2005 GMC SIERRA 1500 HD REAR SUSPENSION, 2WD, 4WD, SEVERE SERVICE
2005 GMC SIERRA 1500 REAR SUSPENSION, 4WD, SEVERE SERVICE, WORK TRUCK (WT), EXTENDED CAB, CREW CAB
2005 CHEVROLET SILVERADO 3500 HD CAB & CHASSIS SINGLE REAR WHEEL
2005 CHEVROLET SILVERADO 3500 ALL MODELS
2005 CHEVROLET SILVERADO 2500 HD ALL MODELS
2005 CHEVROLET SILVERADO 2500 ALL MODELS
2005 CHEVROLET SILVERADO 1500 HD REAR SUSPENSION, 2WD, 4WD, SEVERE SERVICE
2005 CHEVROLET SILVERADO 1500 REAR SUSPENSION, 4WD, SEVERE SERVICE, WORK TRUCK (WT), EXTENDED CAB, CREW CAB
2004 GMC SIERRA 3500 HD CAB & CHASSIS SINGLE REAR WHEEL
2004 GMC SIERRA 3500 ALL MODELS
2004 GMC SIERRA 2500 HD ALL MODELS
2004 GMC SIERRA 2500 ALL MODELS
2004 GMC SIERRA 1500 REAR SUSPENSION, 4WD, SEVERE SERVICE, WORK TRUCK (WT), EXTENDED CAB, CREW CAB
2004 CHEVROLET SILVERADO 3500 HD CAB & CHASSIS SINGLE REAR WHEEL
2004 CHEVROLET SILVERADO 3500 ALL MODELS
2004 CHEVROLET SILVERADO 2500 HD ALL MODELS
2004 CHEVROLET SILVERADO 2500 ALL MODELS
2004 CHEVROLET SILVERADO 1500 REAR SUSPENSION, 4WD, SEVERE SERVICE, WORK TRUCK (WT), EXTENDED CAB, CREW CAB
2003 GMC SIERRA 3500 ALL MODELS
2003 GMC SIERRA 2500 HD ALL MODELS
2003 GMC SIERRA 2500 ALL MODELS
2003 GMC SIERRA 1500 HD REAR SUSPENSION, 2WD, 4WD, SEVERE SERVICE
2003 GMC SIERRA 1500 REAR SUSPENSION, 4WD, SEVERE SERVICE, WORK TRUCK (WT), EXTENDED CAB, CREW CAB
2003 CHEVROLET SILVERADO 3500 ALL MODELS
2003 CHEVROLET SILVERADO 2500 HD ALL MODELS
2003 CHEVROLET SILVERADO 2500 ALL MODELS
2003 CHEVROLET SILVERADO 1500 HD REAR SUSPENSION, 2WD, 4WD, SEVERE SERVICE
2003 CHEVROLET SILVERADO 1500 REAR SUSPENSION, 4WD, SEVERE SERVICE, WORK TRUCK (WT), EXTENDED CAB, CREW CAB
2002 GMC SIERRA 3500 ALL MODELS
2002 GMC SIERRA 2500 HD ALL MODELS
2002 GMC SIERRA 2500 ALL MODELS
2002 GMC SIERRA 1500 HD REAR SUSPENSION, 2WD, 4WD, SEVERE SERVICE
2002 GMC SIERRA 1500 REAR SUSPENSION, 4WD, SEVERE SERVICE, WORK TRUCK (WT), EXTENDED CAB, CREW CAB
2002 CHEVROLET SILVERADO 3500 ALL MODELS
2002 CHEVROLET SILVERADO 2500 HD ALL MODELS
2002 CHEVROLET SILVERADO 2500 ALL MODELS
2002 CHEVROLET SILVERADO 1500 HD REAR SUSPENSION, 2WD, 4WD, SEVERE SERVICE
2002 CHEVROLET SILVERADO 1500 REAR SUSPENSION, 4WD, SEVERE SERVICE, WORK TRUCK (WT), EXTENDED CAB, CREW CAB
2001 GMC SIERRA 3500 ALL MODELS
2001 GMC SIERRA 2500 HD ALL MODELS
2001 GMC SIERRA 2500 ALL MODELS
2001 GMC SIERRA 1500 HD REAR SUSPENSION, 2WD, 4WD, SEVERE SERVICE
2001 GMC SIERRA 1500 REAR SUSPENSION, 4WD, SEVERE SERVICE, WORK TRUCK (WT), EXTENDED CAB, CREW CAB
2001 CHEVROLET SILVERADO 3500 ALL MODELS
2001 CHEVROLET SILVERADO 2500 HD ALL MODELS
2001 CHEVROLET SILVERADO 2500 ALL MODELS
2001 CHEVROLET SILVERADO 1500 HD REAR SUSPENSION, 2WD, 4WD, SEVERE SERVICE
2001 CHEVROLET SILVERADO 1500 REAR SUSPENSION, 4WD, SEVERE SERVICE, WORK TRUCK (WT), EXTENDED CAB, CREW CAB
2000 GMC SIERRA 2500 HD ALL MODELS
2000 GMC SIERRA 2500 ALL MODELS
2000 GMC SIERRA 1500 REAR SUSPENSION, 4WD, SEVERE SERVICE, WORK TRUCK (WT), EXTENDED CAB, CREW CAB
2000 CHEVROLET SILVERADO 2500 HD ALL MODELS
2000 CHEVROLET SILVERADO 2500 ALL MODELS
2000 CHEVROLET SILVERADO 1500 REAR SUSPENSION, 4WD, SEVERE SERVICE, WORK TRUCK (WT), EXTENDED CAB, CREW CAB
1999 GMC SIERRA 2500 HD ALL MODELS
1999 GMC SIERRA 2500 ALL MODELS
1999 CHEVROLET SILVERADO 2500 HD ALL MODELS
1999 CHEVROLET SILVERADO 2500 ALL MODELS
1999 CHEVROLET SILVERADO 1500 REAR SUSPENSION, 4WD, SEVERE SERVICE, WORK TRUCK (WT), EXTENDED CAB, CREW CAB