GMC Sierra Denali 3500HD Tow/Dually 4.0"F/1.0"R SST Lift Kit, 2011-2015, 2WD & 4WD

2011-UP Silverado / Sierra 3500HD Tow/Dually SST Lift Kit


Quick Overview

Max Lift: 4.0"F/1.0"R - Max Tire: 34"
NOTE: Single Rear Wheel with Tow Package Springs or Dual Rear Wheels ONLY
Requires the use of longer front shocks. Shocks not included with kit.

ReadyLIFT Chevy Silverado 3500HD GMC Sierra Lift Kit 69-3421

  • 2011-UP Chevy Silverado GMC Sierra Denali 2500HD/350HD SST Lift Kit
  • ReadyLIFT Chevy Silverado 3500HD GMC Sierra Lift Kit 69-3421

Additional Information

Install Video No
Other Info No
Installation Instructions No
SKU 69-3421

ReadyLIFT® Suspension Inc. is excited to offer new 2011-2015 Chevy and GMC 3500HD truck owners a lift solution that won’t break the bank nor permanently modify your truck. This is a true bolt on Lift kit! The new Stage 1 69-3421 SST Lift Kit by ReadyLIFT® will lift the front of your new HD truck a maximum of 4 inches!

This kit is for use on 2011-UP 3500HD trucks WITH Single Rear Wheels and Factory Tow Package Leaf Springs OR Dually Rear Wheels.

This awesome new SST Lift Kit for new GMC HD trucks includes a pair of tough heavy-duty tubular steel upper control arms engineered to match the strength of your truck. 2011-UP HD-specific lift-oriented ReadyLIFT forged torsion keys provide an adjustable lift while maintaining the factory ride. These super strong forged torsion keys are stronger than stock with the same design and features a indexing that is unique to this kit!

The Stage 1 69-3421 Lift Kit also includes CNC-machined differential drop spacers which lowers the differential and puts the front CV axles into safe factory angle on 4WD trucks. 2WD trucks will not us the diff spacers.

To lift the rear of your new GMC Sierra Denali HD truck, the ReadyLIFT SST Lift Kit includes OEM style 1.0" cast iron rear lift blocks complete with new u-bolts and hardware. A Tow Package version of this kit is also available with a taller 2.0" rear lift block. The rear block system of this kit is for use on SRW 3500HD trucks with the factory tow package rear springs - or - dual rear wheels.

(Optional ReadyLIFT SST9000 Performance Rear Shocks 99-3411R also available - sold separately) .

Also included with this kit are new super strong tie-rod end assemblies to replace the weak factory versions. For the longest time GM tie rod assemblies have been a weak link on all GM trucks. These heavy duty steering assemblies install easily and incredibly stronger than the OEM units. You won't find this kind of attention to detail with any other lift kit for the new GM HD trucks! This great combination gives the new GM HD trucks a great raised stance using super strong components and allows for up to a 34 inch tall tire.
NOTE: Requires the use of longer front shocks. Shocks not included with Stage 1 kit 69-3421
Recommend ReadyLIFT SST9000 Performance Shocks 99-3414F (Front Shocks) designed specifically for this lift kit. 

Features & Benefits:
Strong Tube Steel Upper Control Arms
Forged ReadyLIFT Kit-Specific Torsion Keys
Heavy Duty Tie Rod Steering Assemblies
CNC Machined Diffential Drop Spacers
OEM Style Cast Iron Rear Blocks With U-Bolts
No Cutting - No Modifications Required!

Note: Some trucks may not achieve a full 4" of lift when installed properly. Our testing has shown that post installation suspension lift increase will vary between 3.5 and 4 inches. 

ReadyLIFT 2.25" Leveling Kit For 2011-2015 GM HD Trucks also available.
Rear lift blocks for 2011-2015 GM HD trucks also available.

GMC Sierra Denali 2500 HD lift Kit, ReadyLIFT, 2011, 2012, SST lift kit

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2011 GMC Sierra Denali 2500HD 4WD shown with ReadyLIFT 69-3411 SST Lift Kit
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rollover warning

2011-UP Silverado / Sierra 3500HD SST Lift Kit for use on trucks with SRW and Tow Package rear springs OR Dually rear wheels

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