ReadyLIFT Suspension Block Kit - 2025-2026 Chevy GMC Silverado Sierra 1500 (26-35225)

This ReadyLIFT 2.25 inch rear block kit is for the 2025-2026 Chevy Silverado and GMC Sierra 1500. The cast iron blocks have built-in anti-rotation ears and add 1.25 inches of rear lift once the factory 1 inch block is removed. It is meant to work with a ReadyLIFT leveling kit to restore rake for towing and hauling.

Key features

• Cast iron blocks based on OEM designs, not lightweight extrusions
• Built-in anti-rotation ears
• New, longer U-bolts and hardware
• Eliminates stacked blocks, which may be illegal in some states

What's included

• Two (2) rear blocks
• Four (4) E-coated U-bolts
• Eight (8) nuts and washers

Fitment and compatibility

• Fits 2025-2026 Chevy Silverado 1500 and GMC Sierra 1500, new body style, 6-lug trucks
• Not compatible with trucks that have rear composite mono-leaf springs (round U-bolt around the top of the leaf). It needs traditional steel leaf springs with square U-bolts
• ReadyLIFT recommends pairing it with a ReadyLIFT leveling kit (no part number given)

Specifications

• Brand: ReadyLIFT
• Part number: 26-35225
• Block height: 2.25 inch
• Rear lift: 1.25 inch after removing the factory 1 inch block
• Material: Cast iron
• Warranty: ReadyLIFT Lifetime Warranty
• Estimated install time: 1.8 hours, plus or minus 0.5 hours

Installation

Allow about 1.8 hours, plus or minus 0.5, not counting alignment or wheel and tire assembly. ReadyLIFT recommends a certified mechanic. Alignment may be required, check your headlamp aim afterward, and ADAS systems may need recalibration.

Modifying your suspension can change handling (SAE J2492). ReadyLIFT's page also carries a California Proposition 65 warning that names DEHP.