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2011-2018 GM 2500HD/3500 5"-8" Suspension System - w/ TRS - Stage 3

SoCal Part #: IVDK78302
Manufacturer Part #: 78302


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Add CDC Valve Option*
MSRP: $4,799.68
Price: $4,567.92

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The ICON 2011+ Chevy / GMC 2500HD / 3500 5" - 8" Suspension System - Torsion Relocation System (TRS) - Stage 3 System was engineered to offer superior ride quality, performance, component protection, and reliability all in one complete package. With over a year of development and testing our suspension system is sure to perform with the best on or off road handling and drivability. Included in this lift kit are components and features such as a heavy duty boxed sub-frame with integrated differential and transmission skid plates, precision CNC machined cast iron spindle knuckles, adjustable lift height, V.S. 2.5 Series shocks front & rear, rear lift blocks w/ built in bump stops, torsion bar relocation brackets, all 100% Made in the USA. ICON's TRS System allows the factory torsion bar to remain in the factory location giving the center of the vehicle maximum ground clearance. The Stage 3 GM 2500HD / 3500 5-8" system upgrades the 2.0 Aluminum Series shocks to V.S. 2.5 Series piggy back shocks giving you superior overall performance & handling compared to any other available suspension. We do offer additional upgraded stages that include out tubular uniball upper control arms that will increase your suspension travel almost 50%.

The ICON CDC Valve is an externally adjustable valve that restricts oil flow into the reservoir creating 10 levels of compression damping force ranges. Controlling the amount of oil flow externally allows for optimally adjusting damping for varying terrain. With the addition of an ICON CDC Valve a different tune is required on the working piston to get the ride quality range of adjustment to softer than standard at the “S” setting and much firmer than standard at the “H” setting. The ICON CDC Valve piston is custom tuned per application with different valve stacks because not all shocks or applications are equal.

  • 78700 - 5-8" Lift Components
  • 78703 - Torsion Relocation System
  • 77736 (Qty.2) - Front 2.5 VS Piggyback Shocks
  • 77727 (Qty.2) - Rear 2.5 VS Piggyback Shocks

  • Heavy Duty Boxed Sub-Frame with integrated Diff and Transmission Skid Plates
  • Precision CNC Machined Cast Iron Spindle Knuckles
  • Includes ICON TRS brackets to keep Torsion Bars in the Factory Location
  • 5-8” Adjustable Lift Height
  • Improved Ground Clearance
  • Improved drivability and handling over stock
  • Complies with GM Stabilitrak System
  • ICON high quality fit, appearance and improved suspension function
  • Retains Factory track width when high offset wheels are used
  • 100% made in the USA
  • Lifetime warranty on ICON Fabricated non serviceable components


Install Time: 7 - 8 Hours
Install Difficulty:

  • 2011-Current Chevrolet Silverado 2500HD/3500 2/4WD
  • 2011-Current GMC Sierra 2500HD/3500 2/4WD

Tire Size:
35" Tall w/ 6-7" Lift
37" Tall w/ 8" Lift w/ Trimming

17"-18" w/ up to 5.5" Backspace
20" w/ up to 5.75" Backspace


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