Tuff Country 97011 Block & Ubolt Kit - 5 1/2" (H) x 2 1/2" (W) x 5 1/4" (L) Tapered

The Tuff Country 97011 Block & U-bolt Kit is a rear lift solution designed for 3/4-ton Chevy and GMC 4WD trucks, delivering a controlled 5.5-inch raise with tapered blocks and zinc-plated u-bolts.

• Lift height: 5.5" rear lift with tapered blocks to improve stance and wheel travel.
• Block dimensions: 5.5" (H) x 2.5" (W) x 5.25" (L) profile for a compact, site-placed lift between the leaf springs and axle.
• Material options: Heavy-duty cast iron blocks (blocks may be cast or aluminum depending on production batch).
• Tapered design: Blocks are machined tapered to reduce driveline vibration and maintain smoother rear suspension behavior.
• U-bolts: Extended zinc-plated rear u-bolts engineered specifically for Chevy/GMC K2500 4WD applications.
• Compatibility: Fits the rear axle of 1973–1991 Chevy Suburban K2500 4WD, 1973–1987 Chevy Truck K2500 4WD, 1973–1991 GMC Suburban 4WD 3/4 Ton, and 1973–1987 GMC Truck K2500 4WD.
• Installation: Simple bolt-on installation by inserting the lift blocks between the factory rear leaf springs and axle; kit replaces factory u-bolts.
• Shocks note: In most applications, shocks must be extended if installing rear blocks 2" in height or taller; plan for extended-length shocks accordingly.
• Brand: From Tuff Country, a trusted name in off-road suspension components with a focus on durability and reliable performance.

The 97011 kit is designed to lift the rear of your Chevy or GMC 3/4-ton 4WD with precision, maintain a factory-like ride feel, and provide the extra ground clearance you need for heavier payloads or a more level stance. By including tapered cast blocks (or aluminum blocks depending on batch) and zinc-plated extended u-bolts, the kit delivers a robust, corrosion-resistant upgrade that’s built to withstand demanding daily use and off-road conditions. It’s a true bolt-on solution for rear-axle upgrades that keeps the suspension geometry aligned with the vehicle’s original design intent, helping you achieve the desired look and performance without compromising reliability.