6" Lift Kit — GM HD Trucks

SKU: 42-30640

Turn your Silverado/Sierra HD into a confident, high-clearance rig—without compromising ride. This premium 6" system pairs heavy-duty steel hardware with vehicle-tuned Falcon 2.1 monotube shocks at all four corners for standout control on-road and off.

Highlights

• True 6" lift for serious ground clearance

• Heavy-duty fabricated steel components (3/16" & 1/4" plate) built to last

• Full-coverage 3/16" differential skid plate for undercarriage protection

• Laser-cut, CNC-formed front & rear drop crossmembers maintain correct geometry

• Vehicle-specific Falcon 2.1 shocks for improved roll control & low-speed damping

• Noticeably smoother highway ride and better off-road performance

• Optimized clearances for unobstructed suspension travel & articulation

Tire & Wheel Fitment

• Runs 37x12.50 tires on 20x9 wheels with 0 offset

Shock Tech (Falcon 2.1)

• 6061-T6 aluminum shock bodies resist impacts & corrosion

• Smooth-honed internals for long-term consistency

• 3/4" induction-hardened, chrome-plated shafts resist rock damage & buckling

• Hard-anodized 6061-T6 billet pistons with 1-piece Teflon® bronze wear band + O-ring

What’s Included

• Front & rear drop crossmembers

• Differential skid plate

• Complete mounting hardware

• (4) Falcon 2.1 monotube shocks

Notes & Compatibility

• Not compatible with AT4X or ZR2 models

• Single Cab fitment/drivability not validated by ReadyLIFT

• Some Tow Package trucks may require custom-length U-bolts (varies by application).
  If the kit’s standard U-bolts are too short, source custom U-bolts locally to your truck’s specs.

Have questions about wheels, tires, or install? Contact us—we’ll help you dial in the perfect setup.