ReadyLift - 3" Rear Block Kit - 1999-2024 Chevy/GMC 1500 (6-Lug) - 66-3003

3" OEM-style cast-iron rear block kit for 6-lug Chevy/GMC 1500 trucks.

OEM-style cast-iron rear blocks with built-in anti-rotation ears safely add rear lift and eliminate the danger of stacking blocks. Trucks with a factory 1.25" block gain about 1.75" of additional rear lift; 1999-2006 4WD trucks replace the factory 2" block for 1" more. Designed to work with a ReadyLift front leveling kit for a slight rake.

Fits: 1999-2024 Chevy Silverado / GMC Sierra 1500, classic and current body, 6-lug, 2WD and 4WD. Not for use on trucks with rear composite mono-leaf/overload springs (round U-bolts).

Features

• 3"-tall rear block for up to 1.75" of added lift
• OEM-style cast iron with anti-rotation ears
• Includes new U-bolts and hardware
• Restores rake for towing and hauling

Kit Includes

• Two 3" rear blocks
• Four e-coated U-bolts
• Eight nuts and washers
• Instructions

Notes

Not compatible with vehicles equipped with rear composite mono-leaf/overload springs (identified by round U-bolts); works only with traditional steel leaf springs. Shock extensions may be needed depending on application. 2019-up trucks may need excess bolt length trimmed. Estimated installation time about 1.8 hours. Backed by the ReadyLift limited lifetime warranty.