Fabtech 4" Dirt Logic Suspension System w/Dirt Logic 2.5 Reservoir Coilovers & Dirt Logic 2.25 Rear Shocks – 2025 GM 1500 4WD Trail Boss & AT4 (K1230DL)

Upgrade the suspension performance, ride quality, and off-road capability of your GM truck with the Fabtech 4-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 proven lift system design with Dirt Logic 2.5 remote reservoir front coilovers and Dirt Logic 2.25 rear shocks for exceptional ride control and off-road performance.

Engineered specifically for Trail Boss and AT4 equipped trucks, this system provides increased ground clearance, improved suspension travel, enhanced wheel control, and superior damping performance across a wide range of terrain. The included Dirt Logic 2.5 remote reservoir coilovers feature high-flow pistons, precision valving, and increased oil capacity to deliver consistent suspension performance in demanding conditions.

Fabtech Dirt Logic 2.25 rear shocks complement the front coilovers by providing exceptional rear suspension control, improved ride quality, and reduced shock fade during aggressive off-road driving. The result is a suspension system that delivers premium performance on the trail while maintaining excellent on-road comfort and handling.

Ideal for overlanding, trail riding, off-road enthusiasts, and truck owners seeking the highest level of suspension performance.

Features:

• Provides approximately 4" of suspension lift
• Designed for 2025 GM 1500 Trail Boss and AT4 4WD models
• Includes Dirt Logic 2.5 remote reservoir front coilovers
• Includes Dirt Logic 2.25 rear shock absorbers
• Improves suspension travel and wheel articulation
• Enhances ground clearance and off-road capability
• High-flow piston technology for superior damping control
• Remote reservoirs improve cooling and damping consistency
• Reduces shock fade during demanding off-road use
• Improves ride quality, handling, and vehicle stability
• Allows fitment of larger wheel and tire combinations
• Maintains proper suspension geometry
• Heavy-duty construction for demanding off-road use
• Improves vehicle stance and overall appearance
• Direct bolt-on installation
• Sold as a complete suspension system
• Backed by Fabtech's limited lifetime warranty on suspension components

Kit Components:

• Fabtech 6" Lift System Component Box 1 (FTS21250)
• Fabtech Dirt Logic 2.5 Reservoir Front Coilovers – Pair (FTS21260)
• Fabtech Dirt Logic 2.25 Rear Shock Absorbers – Pair (FTS811462)
• Fabtech 4" Trail Boss/AT4 Component Box 2 (FTS21308)

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 and rear shocks
• Professional installation recommended
• Alignment required after installation
• Verify wheel, tire, and backspacing requirements before purchase