Rough Country
6 Inch Lift Kit | M1 | Chevy/GMC Sierra/Silverado 2500 4WD (1999-2004)
6 Inch Lift Kit | M1 | Chevy/GMC Sierra/Silverado 2500 4WD (1999-2004)
Ships from our supplier. Online availability reflects supplier inventory, not stock at our shop. Check all vehicle fitment notes before ordering.
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Transform your Heavy-Duty Truck into an off-road beast while maintaining factory ride comfort. This all-inclusive kit delivers increased ground clearance, allowing you to conquer rough terrain with ease—all without sacrificing your smooth ride on the pavement. Ready for Adventure with 35-Inch Tires: This kit is designed to run up to 35x12.50 tires, giving your truck a bold, aggressive stance and the traction you need for any off-road challenge. Built Tough for Any Terrain: Engineered with CNC-machined knuckles and heavy-duty laser-cut crossmembers, this lift ensures ultimate strength and durability on the trail. Plus, the integrated skid plate adds critical protection to vital components without compromising clearance. Customize Your Ride for Maximum Performance: Choose your ideal suspension setup with configurable shock options, including nitrogen-charged N3, V2 Monotube, or M1 Monotube shocks. Whether you crave versatility or high-performance damping, we’ve got you covered. Take your off-road game to the next level—this 6-inch suspension lift gives you everything you need for unbeatable style, performance, and protection.
Features
Maintains Factory Ride Quality: Ensures a smooth, comfortable ride on and off the road. Increased Ground Clearance: Tackle rough terrain with improved off-road performance. Designed to Run 35x12.50 Tires: Supports larger tires for an aggressive stance and enhanced traction. One-Piece CNC-Machined Knuckles: Precision-crafted for strength and durability. Integrated Skid Plate: Protects vital components without sacrificing ground clearance. Configurable Shock Options: Choose from our nitrogen-charged N3, V2 Monotube, or M1 Monotube shocks—the power to customize your ride is in your hands!
Fitment and installation notes
Applicable on 2007 "Classic" models. Requires minor modification to the front differential. Models with 2-piece driveshafts require a carrier-bearing drop kit. SKU: 1115 . Torsion bar unloading tool required for installation. SKU: 1067 .
Vehicle fitment
Match the exact year, model, trim, drivetrain, and any cab or bed requirements in the notes.
| Years | Make | Model | Trim | Drive |
|---|---|---|---|---|
| 1999–2002 | GMC | Sierra 2500 | SL | 4WD |
| 1999–2004 | Chevrolet | Silverado 2500 | Base, LS, LT | 4WD |
| 1999–2004 | GMC | Sierra 2500 | SLE, SLT | 4WD |
| 2001–2005 | Chevrolet | Silverado 1500 HD | LS | 4WD |
| 2001–2006 | Chevrolet | Silverado 1500 HD | LT | 4WD |
| 2001–2006 | GMC | Sierra 1500 HD | SLE, SLT | 4WD |
| 2002–2004 | GMC | Sierra 2500 | Base | 4WD |
| 2003–2004 | GMC | Sierra 2500 | WT | 4WD |
| 2004 | Chevrolet | Silverado 2500 | WT | 4WD |
| 2005 | Chevrolet | Silverado 1500 HD | Base | 4WD |
Installation instructions
View manufacturer instructions
Part number: 25940
