8" 2025-2026 GMC Sierra 1500 4WD MAX 3.3 Suspension Lift Kit (w/Falcon 3.3 Fast Adjust Dampers) by ReadyLift

The ReadyLIFT 42-35841 8-Inch MAX3.3 Suspension System is a premium performance lift kit designed for 2025–up GMC Sierra trucks. Built around Falcon 3.3 Fast Adjust remote reservoir coilovers and rear shocks, this system combines an aggressive lifted stance with adjustable ride control, increased ground clearance, and improved off-road capability while maintaining excellent street manners.

Up front, Falcon 3.3 remote reservoir coilovers provide the lift and damping control with extensive on-vehicle adjustability. The Fast Adjust system offers three primary settings—Soft, Custom, and Firm—along with 8-position micro-adjustment for dialing in ride quality based on terrain, load, and driving style. Heavy-duty DOM tubular upper control arms with high-angle ball joints improve strength and suspension articulation at the increased ride height.

The suspension system also features boxed steel front and rear crossmembers, reinforced differential drop brackets, lifted steering knuckles, sway bar correction brackets, and a full-width skid plate to maintain proper suspension geometry and protect critical components. In the rear, fabricated 5-inch lift blocks, an add-a-leaf, and Falcon 3.3 piggyback shocks provide balanced ride height and damping performance.

With the recommended wheel setup, the MAX3.3 system provides clearance for 37x12.50 tires without trimming, delivering the stance and capability expected from a premium full-size truck suspension system.

Features & Benefits

• Provides up to 8 inches of suspension lift
• Falcon 3.3 Fast Adjust remote reservoir front coilovers
• Falcon 3.3 piggyback reservoir rear shocks
• 3-position Fast Adjust control with 8-position micro tuning
• Heavy-duty DOM tubular upper control arms with high-angle ball joints
• Boxed steel front and rear crossmembers
• Reinforced differential drop brackets maintain proper driveline geometry
• Lifted steering knuckles retain proper steering geometry and turning radius
• Full-width skid plate provides added underbody protection
• Fabricated rear lift blocks with integrated bump stop landings
• Designed to maintain excellent ride quality and drivability

Recommended Tires & Wheels

• Recommended / No Trimming: 37x12.50 tires on 20x9 wheels with 0 mm offset
• Maximum Fitment: 37x12.50 tires on 20x10 wheels with -18 mm offset; trimming required

What's Included

• Falcon 3.3 Front Remote Reservoir Coilovers
• Falcon 3.3 Rear Piggyback Reservoir Shocks
• Heavy-Duty Upper Control Arms
• Lifted Steering Knuckles
• Front and Rear Crossmembers
• Differential Drop Brackets
• CV Axle Spacers
• Sway Bar Drop Brackets
• Full-Width Front Skid Plate
• 5" Fabricated Rear Lift Blocks
• Rear Add-A-Leaf
• Brake Line and ABS Relocation Brackets
• U-Bolts and Installation Hardware

• Fits 2025–up GMC Sierra 1500 models.
• AT4 and Trail Boss models will net approximately 6 inches of lift over their factory ride height.
• AT4X and ZR2 models will net approximately 6 inches over factory height and the factory Multimatic shocks will be removed.
• Not compatible with diesel models.
• Not compatible with Denali models or Adaptive Ride Control.
• Not compatible with rear mono-leaf spring applications.
• Not compatible with Super Cruise.
• Use of the Auto 4 Hi feature is not recommended.
• Single Cab fitment and drivability have not been validated by ReadyLIFT.