6" 2001-2006 GMC Sierra 1500HD 4WD Lift Kit by Skyjacker

The Skyjacker C9651HK 6-Inch Suspension Lift Kit for 2001-2006 GMC Sierra 1500HD 4WD models is a complete, heavy-duty suspension system that delivers substantial ground clearance, increased tire clearance, and relocated suspension components for a taller ride height. The system combines replacement steering knuckles, heavy-duty front and rear crossmembers, torsion bar drop brackets, bump stop brackets, a differential skid plate, rear lift components, U-bolts, and supporting hardware. Shock options include Skyjacker Hydro 7000, Nitro 8000, M95 Performance, or BlackMAX shocks, allowing you to match the suspension package to your ride and damping preferences.

The front suspension uses application-specific replacement steering knuckles and heavy-duty crossmembers to reposition critical suspension mounting points for the 6-inch increase in ride height. Torsion bar drop brackets relocate the factory torsion bar system to work with the taller suspension, while dedicated bump stop brackets maintain proper compression control as the suspension cycles. The included differential skid plate protects critical front drivetrain components and, paired with the crossmember-based suspension layout, provides a strong foundation for the lifted front end.

At the rear, lift components and longer U-bolts raise the factory leaf-spring suspension to complement the increased front ride height and create a balanced stance. The system supports up to 35x12.50 tires with properly configured wheels, making the C9651HK a substantial suspension upgrade for Sierra 1500HD builds that need increased ground clearance, more tire clearance, and a stronger lifted stance while retaining the factory platform's heavy-duty characteristics.

The C9651HK is available with four Skyjacker shock configurations. Hydro 7000 shocks use velocity-sensitive hydraulic damping for smooth, predictable suspension response on everyday street and trail rides. Nitro 8000 shocks use a 150 PSI gas charge for firmer, more responsive damping and increased suspension control. BlackMAX shocks feature advanced foam-cell hydraulic construction for consistent damping without a high-pressure gas charge, while M95 Performance shocks use a 200 PSI gas-charged monotube internal floating piston design for responsive damping, consistent control, and improved heat management during more demanding driving conditions.

Features & Benefits

• Provides approximately 6 inches of suspension lift for increased ground clearance and tire clearance
• Designed for 2001-2006 GMC Sierra 1500HD 4WD models
• Replacement steering knuckles help maintain proper steering geometry at the increased ride height
• Heavy-duty front and rear crossmembers relocate critical suspension mounting points
• Crossmember system provides a strong structural foundation for the lifted front suspension
• Torsion bar drop brackets reposition the factory torsion bar system for the taller suspension
• Front bump stop brackets help maintain proper compression control and suspension travel
• Differential skid plate provides additional protection for critical front drivetrain components
• Rear suspension components raise the factory leaf-spring suspension to complement the front lift
• Includes rear U-bolts for the lifted leaf-spring configuration
• Creates a balanced 6-inch lifted stance from front to rear
• Provides clearance for up to 35x12.50 tires with properly configured wheels
• Available with Skyjacker Hydro 7000 hydraulic shocks
• Hydro 7000 shocks use velocity-sensitive hydraulic damping for smooth and predictable suspension response
• Available with Skyjacker Nitro 8000 gas-charged shocks
• Nitro 8000 shocks use a 150 PSI gas charge for firm and responsive suspension control
• Available with Skyjacker BlackMAX foam-cell hydraulic shocks
• BlackMAX shocks use advanced foam-cell hydraulic construction for consistent street and trail damping
• Available with Skyjacker M95 Performance monotube shocks
• M95 shocks use a 200 PSI gas-charged monotube internal floating piston design for consistent damping and improved heat management
• Multiple shock configurations allow the suspension system to be matched to different ride characteristics and performance demands