3" / 1" SST Lift Kit — GM HD 2500/3500 (2020–2026)

SKU: 69-30320

Give your Silverado/Sierra HD a confident, leveled stance and room for 35s—without compromising ride quality.

• 3" front / 1" rear SST lift

• Forged torsion keys engineered for this kit

• Falcon 1.1 monotube shocks (front & rear)

• Xtreme-Duty 4130 chromoly upper control arms

• Inner fender bracket to increase large-tire clearance

Fitment

• Vehicles: 2020–2025 GM HD 2500/3500

• Not compatible: AT4X or ZR2 models

Tire & Wheel Guidance

• No-trim fit: 35x12.50 on 20x9, 0 offset

• Max (with trimming): 35x12.50 on 20x10, −18 offset
  Note: Trimming can vary between Silverado and Sierra.

• Max tire width on stock wheels: 11.5"

Important Setup Note

When adjusting torsion keys, do not exceed 27" measured from wheel center to fender edge. Exceeding this height “top-offs” the suspension (minimal down travel), which degrades ride quality and accelerates component wear.

Have questions about wheel/tire combos or install? We’re happy to help you dial in the perfect setup.