ReadyLift 69-3920 SST Lift Kit for GM 1500 AT4/Trail Boss (2019–2023) — Front 2.0" Lift, Rear 1" Lift

• Engineered for GM 1500 AT4 and Trail Boss 4WD trucks (2019–2023), delivering a true 2" front lift and 1" rear lift via a bolt-on installation.
• Includes a top-mount strut spacer and preload spacer to limit droop, plus premium-grade upper control arms (the same design used in the 66-3921 leveling kit).
• Rear lift achieved with OE-style 3" tall cast iron lift blocks and rear bump stop extension cups for a solid, OE-like fit.
• Tire/wheel compatibility: AT4 up to 305/55-20 on 20x9 wheels with 0 offset; Trail Boss up to 295/65-20 on 20x9 wheels with 0 offset.
• Compatibility caveats: Not compatible with rear composite mono-leaf springs (requires traditional steel leaf springs with square U-bolts); not compatible with Sierra AT4X or Silverado ZR2 Edition.
• Note: Auto 4HI feature not recommended.