2011-2025 Duramax HD 2" Rear Block Kit (66-3122)

Note: Not compatible with trucks equipped with top-mounted overload springs.

If you need to add a slight rake back into your pickup, the last thing you should be doing is stacking blocks, this can cause severe damage and is incredibly unsafe. ReadyLift offers a wide variety of rear lift blocks so you can safely add the appropriate amount of height to your truck.  Based on OEM designs and made from cast iron, these blocks are durable, easy to install, and make a great tow package upgrade.

Part Number: 66-3122

• OEM Style design
• Durable cast-iron construction
• Ideal for towing & hauling
• Adds slight rake
• Eliminates stacking blocks
• (2) 2" Rear Blocks
• (4) E-Coated U-Bolts
• (8) Nuts and Washers

• For use on Single Rear Wheel (SRW) 2500HD trucks that have the factory trailer package rear springs or 3500HD Dual Rear Wheel trucks. 
• For Use on 2500HD trucks that have the factory Trailer Package rear springs or Dual Rear Wheel (DRW) Trucks 

• ReadyLIFT Suspension Inc. and/or Dirty Diesel Customs are NOT responsible for any damage or failure resulting from improper installation.
• Click Here to view installation instructions

Don't see your question? Ask us anything about this product.