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26-3950 ReadyLift 5" Rear Block Kit - GMC/Chevy 3.0L Duramax 2020-2023

SKU: RL26-3950
Mftr. Part#: 26-3950
Manufacturer: ReadyLift
ReadyLift's Chevy/GMC 1500 5 Inch OEM Style Rear Block Kit Fits 2019-2023 Replaces factory rear block for a total of 4" of rear lift. Includes new longer U-bolts and hardware.

PRODUCT DETAILS (click to expand)

PRODUCT SPECS (click to expand)



ReadyLift’s OEM-style rear block kits include two (2) Rear Blocks, four (4) E-Coated U-Bolts, and eight (8) Nuts and Washers. The 26-3950 5" rear block kit will safely lift the rear an additional 4" after removing the factory 1" block. Based on OEM designs ReadyLIFT GM Blocks are made from cast iron and have built-in anti-rotation ears. Fits 2019-2023 new body style 6-lug model Silverado/Sierra trucks. New models with OEM 1.25" blocks will want to take advantage of the additional 4" of lift for towing and hauling, particularly when using a front leveling kit. Eliminates the dangers of having stacked. ReadyLIFT Block Kits will put a slight rake back in your truck for hauling or towing and are designed to work in concert with your ReadyLIFT Suspension Leveling Kit. Like all ReadyLIFT products, these block kits come with Lifetime Warranty


  • OEM Design 
  • High-Quality Construction
  • Lifetime Warranty 


  • ReadyLIFT recommends the use of the 67-3809 Rear Shock Extension Kit or longer shocks when using a lift block of this height. 
  • This GM 1500 kit is NOT COMPATIBLE with vehicles equipped with rear composite mono-leaf springs. The mono-leaf is easily identifiable the U-bolt is round/circular around the top of the leaf spring. This kit only works with vehicle equipped with traditional steel leaf springs identified by square  U-bolts.