SuperLift 6″ Lift Kit For 1999-2006 Chevy Silverado and GMC Sierra 1500 4WD – Knuckle Kit with Bilstein Shocks

SKU: K121B


Only 2 left in stock

Only 2 left in stock


SuperLift 6″ Lift Kit For 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 Chevy Silverado and GMC Sierra 1500 4WD – Knuckle Kit with Bilstein Shocks

Part: K121B

  • This is a complete knuckle style suspension lift kit for the 1999-2006 Chevy/GMC 1500 pickup 4wd; providing 6” of lift height
  • Includes rear blocks and front and rear 5100 Series Bilstein shock absorbers
  • Covered by our Limited Lifetime Warranty
  • This kit also comes in a 5100 Series Bilstein shock option


  • 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
  • The best customer service and technical help in the industry.


Features and Benefits:

  • 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.
  • Limited Lifetime Warranty.
  • 100% Satisfaction Guarantee.
  • Easy to follow DIY friendly installation instructions.


1999-20064WDChevroletSilverado 1500
2007-20074WDChevroletSilverado 1500 – Classic
1999-20064WDGMCSierra 1500
2007-20074WDGMCSierra 1500 – Classic


35 x 12.517 x 94.5
35 x 12.518 x 94.5
35 x 12.520 x 95

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 Notes:

  • 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″).

Includes Shocks exactly as pictured

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