2" Block & U-Bolt Kit - Corrosion Resistant - 1999-2025 Chevy/GMC 1500 2WD/4WD

Rear Block & U-Bolt Kit – Restore Ride Height & Add Strength

Whether you're dealing with rear-end sag from heavy loads or looking to add some extra lift, this Rear Block and U-Bolt Kit delivers the perfect solution. Designed for strength, durability, and a straightforward install, this kit is a must-have upgrade for anyone looking to level out or lift the rear of their vehicle.

Heavy-Duty Performance, Built to Last

At the heart of this kit are high-strength, fiberglass-reinforced nylon blocks—engineered to be significantly stronger than traditional cast blocks. Each block is tapered to correct driveline angles and reduce vibration, providing a smoother, more reliable ride.

The blocks feature a 9/16-inch single pin for a snug fit into the factory axle pad, ensuring proper alignment and long-term stability.

Corrosion-Resistant U-Bolts for a Secure Fit

The included e-coated square U-bolts are built from heavy-duty steel with a black corrosion-resistant finish for long-lasting protection against the elements. With 4 inches of thread and generous 9.5-inch length, these U-bolts make installation simple and secure—no cutting or guesswork required.

Kit Specs:

Rear Blocks
✅ Fiberglass-reinforced nylon construction – lightweight and tough
✅ Tapered design – reduces driveline angle for improved ride quality
✅ 9/16-inch single pin for precise fit
✅ 2.5-inch wide, powder-coated black finish

U-Bolts
✅ Thread size: 9/16-inch
✅ Inside width: 2.5 inches
✅ Inside length: 9.5 inches
✅ Square design with corrosion-resistant black e-coating

Why Choose this set?

✅ Easy, bolt-on install – perfect for weekend DIYers
✅ Vehicle-specific design – engineered for a perfect fit
✅ Satisfaction Guarantee – confidence backed by ZR2AT4X

Add lift, fix sag, and upgrade your rear suspension with confidence—This Rear Block & U-Bolt Kit is the reliable solution you’ve been looking for.

• Does NOT fit models equipped with composite leaf springs.