ReadyLIFT Suspension Block Kit - 2025-2026 Chevy GMC Silverado Sierra 1500 (26-35300)

This ReadyLIFT 3 inch rear block kit is for the 2025-2026 Chevy Silverado and GMC Sierra 1500. It replaces the factory rear block with a cast iron block that has built-in anti-rotation ears, adds a slight rake for hauling or towing, and includes longer U-bolts and hardware.

Key features

• Cast iron construction, based on OEM designs and not lightweight extrusions
• Built-in anti-rotation ears
• Eliminates stacked blocks
• Slight rake for hauling or towing
• Designed to work with a ReadyLIFT suspension leveling kit

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 works only with 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: 26-35300
• Block height: 3 inch
• 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.