Fabtech 1.5" Dirt Logic Suspension System w/Dirt Logic 2.5 Reservoir Coilovers, Dirt Logic 2.25 Rear Shocks & Ball Joint UCA – 2025 GM 1500 4WD Trail Boss & AT4 (K1223DL)

Upgrade the suspension performance, ride quality, and handling of your GM truck with the Fabtech 1.5-inch Dirt Logic Suspension System. Designed specifically for 2025 Chevrolet Silverado 1500 Trail Boss and GMC Sierra 1500 AT4 4WD models, this premium suspension package combines Fabtech's Ball Joint Upper Control Arm system with Dirt Logic 2.5 remote reservoir front coilovers and Dirt Logic 2.25 rear shocks for exceptional on-road comfort and off-road capability.

Engineered specifically for Trail Boss and AT4 equipped trucks, this system provides improved suspension geometry, enhanced wheel control, and increased suspension performance while maintaining excellent daily drivability. The included Ball Joint Upper Control Arms help optimize alignment settings and suspension travel while increasing durability and front-end strength.

Fabtech Dirt Logic shocks utilize high-flow pistons, precision valving, and advanced shock technology to deliver superior damping performance and consistent control in demanding driving conditions. The remote reservoir design improves heat dissipation and helps reduce shock fade during extended off-road use.

Ideal for truck owners seeking premium suspension performance, improved ride quality, and enhanced capability without excessive lift height.

Features:

• Provides approximately 1.5" of suspension lift
• Designed for 2025 GM 1500 Trail Boss and AT4 4WD models
• Includes Ball Joint Upper Control Arm system
• Includes Dirt Logic 2.5 remote reservoir front coilovers
• Includes Dirt Logic 2.25 rear shock absorbers
• Improves suspension geometry and wheel alignment
• Enhances ride quality and vehicle stability
• High-flow piston technology for superior damping control
• Remote reservoirs improve cooling and damping consistency
• Reduces shock fade during demanding off-road conditions
• Improves suspension travel and wheel control
• Supports larger wheel and tire combinations
• Heavy-duty construction for demanding use
• Maintains excellent on-road drivability
• Direct bolt-on installation
• Sold as a complete suspension system
• Backed by Fabtech's limited lifetime warranty on suspension components

Kit Components:

• Fabtech Dirt Logic 2.5 Reservoir Front Coilovers – Pair (FTS21257)
• Fabtech Dirt Logic 2.25 Rear Shock Absorbers – Pair (FTS811452)
• Fabtech Ball Joint Upper Control Arm System (FTS21309)

Fitment:

• 2025 Chevrolet Silverado 1500 Trail Boss 4WD
• 2025 GMC Sierra 1500 AT4 4WD

Notes:

• Designed specifically for Trail Boss and AT4 package vehicles
• Fits 4WD models only
• Includes Dirt Logic front coilovers, rear shocks, and Ball Joint UCA system
• Professional installation recommended
• Alignment required after installation
• Verify wheel, tire, and backspacing requirements before purchase