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

Rear Block & U-Bolt Kit – Fix Rear Sag & Add Lift with Confidence

Whether you're dealing with rear-end sag or looking to add a bit of extra lift, this Rear Block and U-Bolt Kit is the perfect solution. Designed specifically for your vehicle, this kit enhances rear suspension performance and gives your truck the balanced stance it deserves.

Strong, Reliable, and Built to Perform

This kit includes a pair of heavy-duty tapered lift blocks, engineered to correct driveline angles and reduce vibration for smoother operation. Unlike standard cast blocks, Rough Country’s blocks are built tough to withstand the demands of lifted vehicles.

Each block features a 9/16-inch center pin for a tight, secure fit into your factory axle perch, ensuring proper alignment and long-lasting durability.

Secure, Corrosion-Resistant U-Bolts

The included square-style U-bolts are constructed from e-coated, corrosion-resistant steel and offer 4 inches of thread, giving you the length and strength needed for a confident, secure installation—without any guesswork.

Kit Features:

Lift Blocks
✅ Tapered design – improves driveline angle for smoother performance
✅ Heavy-duty construction – stronger than standard cast options
✅ 9/16-inch center pin for OE-style fit
✅ 2.5 inches wide – built for stability

U-Bolts
✅ Thread size: 9/16-inch
✅ Inside width: 2.5 inches
✅ Inside length: 10.5 inches
✅ Square-style design
✅ E-coated black finish – corrosion-resistant for long-lasting performance

Why Rough Country?

✅ Vehicle-specific design – engineered for a perfect fit
✅ Simple bolt-on install – no cutting or fabrication required
✅ Backed by Rough Country’s Satisfaction Guarantee

Restore your truck’s stance, improve ride quality, and handle heavy loads with ease—This Rear Block & U-Bolt Kit is the rear suspension upgrade your build deserves.

• Does NOT fit models with equipped with composite leaf springs.