ReadyLift - 6" MAX3.3 Suspension System (Falcon 3.3) - 2025 Chevy/GMC 1500 (4WD) - 42-35640

6" MAX3.3 suspension system with Falcon 3.3 remote-reservoir shocks for 2025 GM 1500 4WD.

ReadyLIFT MAX3.3 system built around Falcon 3.3 front remote-reservoir coilovers and rear piggyback shocks with 8-position micro tuning and a 3-position Fast Adjust knob (Soft, Custom, or Firm). Heavy-duty DOM tubular steel upper control arms with high-angle proprietary ball joints, boxed steel front and rear crossmembers, and a full-width front skid plate. Retains factory ride quality and turning radius.

Fits: 2025 Chevy Silverado / GMC Sierra 1500 4WD. Nets 4" over factory height on AT4/Trail Boss and on AT4X/ZR2 (installation removes the Multimatic shocks on AT4X/ZR2).

Features

• Falcon 3.3 Fast Adjust coilovers and rear shocks (8-position micro tuning, 3-position Fast Adjust knob)
• 6061-T6 aluminum shock bodies with Red Line high-VI oil and Volume Optimized Damping
• Heavy-duty DOM tubular steel upper control arms with high-angle ball joints
• Boxed steel front and rear crossmembers
• Full-width front skid plate
• Retains factory ride and turning radius

Tire Fitment

Recommended (no trimming): 20x9 0-offset wheels with 35x12.50 tires. Max fitment (with trimming): 20x10 -18-offset wheels with 35x12.50 or 325/60R20 tires; may require trimming of the front valance, inner fender liners, and mud flaps.

Notes

Use of Auto 4 Hi is not recommended. Not for diesel or Denali models. Not compatible with Adaptive Ride Control, retaining Multimatic suspension, rear mono-leaf springs, or Super Cruise. Single cab has not been validated for fitment and drivability.