Skyjacker BUK5589 5.5 Inch Rear Block and U-Bolt Lift Kit

The Skyjacker BUK5589 is a 5.5-inch rear suspension lift kit specifically engineered for 1973-1987 GMC 1/2-ton pickups. This block and U-bolt kit provides significant rear lift to level your truck or create an aggressive stance while maintaining drivability and ride quality.

Key Components:

• Ductile iron lift blocks with fixed center pins for secure mounting
• Tapered blocks designed to correct pinion angle and prevent driveline vibrations
• E-coated U-bolts for superior corrosion resistance and long-lasting durability
• Complete mounting hardware included for straightforward installation

Important Installation Notes:

• Requires wheels with minimum 4-inch backspacing for proper clearance
• Cannot reuse OEM factory wheels due to clearance limitations
• Minor modifications may be required on Duramax-equipped models
• Professional installation by a certified mechanic is strongly recommended

Skyjacker's block and U-bolt kits are engineered to deliver reliable lift performance while maintaining proper suspension geometry. The tapered block design ensures correct driveline angles, reducing vibration and maximizing component life. Backed by Skyjacker's professional-grade warranty, this kit provides the lift you need with the quality you expect from a trusted suspension manufacturer.