6" Lift Kit - 99-06 Silverado/Sierra 1500 4WD - Knuckle Kit w/ SL Shocks

6in Chevy/GMC Lift Kit | Knuckle Kit

Starting At*: $1,084 - $1,309
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*within the contiguous US; ground shipments only.
Price*: $1,203.77 $1,083.39
FREE Shipping on ALL ORDERS!*
*within the contiguous US; ground shipments only.
Find a Dealer CALL 800-551-4955
CALL 800-551-4955
$150 USD Factory Rebate through 4/30Now claim rebates and submit with digital upload online @ truckherorebates.com
Find a Dealer CALL 800-551-4955
CALL 800-551-4955

Your Selected Product Fits These Vehicles

  • 1999-2006 Chevrolet Silverado 1500
  • 2007 Chevrolet Silverado 1500 Classic
  • 1999-2006 GMC Sierra 1500
  • 2007 GMC Sierra 1500 Classic
What is this?View Complete Details
  • This is a complete knuckle style suspension lift kit for the 1999-2006 Chevy/GMC 1500 pickup 4WD
  • Provides 6” lift height
  • Includes rear blocks and front and rear Superlift shock absorbers or rear 5100 Series Bilstein shock absorbers
What does it include?
  • All brackets, cross-members, shocks, steering knuckles, rear 5” block and u-bolt kit, and hardware required specific to the 1999-2006 4WD Chevrolet/GMC 1500.
  • Detailed instruction manual walking you step-by-step through the lift kit installation procedures suitable for do-it-yourselfers (DIY) or professional installation

This Superlift Complete Knuckle Style suspension lift kit for the provides 6” of lift height.


  • Stylish high-clearance cross members are one-piece, laser cut, CNC formed and built to withstand a lifetime of use and abuse.
  • Replacement steering knuckles maintain OE alignment specifications.
  • Minimal differential modification required.
  • Longer front anti-sway bar links included.
  • Rear lift achieved via tried and true 5" cast iron blocks for superior strength.
  • Applicable with Auto Trac models does not require replacement front driveshaft.
  • Allows use of factory spare tire/wheel.


Tire Wheel  Backspacing Offset
35 x 12.5 17 x 9 4.5 -
35 x 12.5 18 x 9 4.5 -
35 x 12.5 20 x 9 5 -


IMPORTANT DISCLAIMER: The provided tire/wheel fitments are approximate. Actual dimensions of a given tire size can vary considerably from one brand to another. Manufacturers' wheel offset and backspacing measurement points are not always consistent. Backspacing greatly impacts tire-to-fender clearance when turning. Wheel width and backspacing influence whether the tires protrude past the fenders, and to what extent. Considering these important factors, we recommend that you fit-check your tire/wheel selection prior to purchasing.

  • Installation time: 8 hours
  • Difficulty level: 4 of 5



Replacing the steering knuckles on this vehicle increases the track width by 1-5/8 inches (1.625").



Superlift shocks are twin tube, velocity sensitive hydraulic shocks. Bilstein shocks are a mono-tube gas pressurized shock. The Superlift shocks are coated with a white paint; the Bilstein shocks are a brushed steel body with a nickel and clear zinc finish. Bilstein shocks are more tuned for the application and offer more precise valving.

3 Total
Nikolai C. Verified Buyer
27 February 2021
Rides good and looks good. Took a weekend to install, mostly by myself. I was missing a front shock bushing kit so reused some of the old ones off my old shocks. I was given a extra bushing kit for the torsion bar drop bracket. Guess they mixed the 2 up on accident. Not a huge deal though.
Shawn Hazlett Verified Buyer
22 October 2016
mitchell Verified Buyer
13 October 2016
online was good tried calling
online was good tried calling and it's hard for anyone to pick up