1999-2018 Chevy, GMC Silverado And Sierra 1500 Rear Leaf Spring 22-1221HD

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Chevy and GMC rear leaf spring part number 22-1221.

  • *Diagram Spring May Differ From Actual Spring*
  • Number of Leaves - 4 (3/1)
  • Leaf Spring Width - 2-1/2"
  • A - Leaf Spring Length: 32"
  • B - Leaf Spring Length: 32"
  • C - Leaf Spring Arch: 6-7/8"
  • D - Spring Pack Thickness: 2"
  • Leaf Spring Capacity: 2250 lbs.
  • Leaf Spring OEM Number: 15033928
  • Leaf Spring Eye Bushings: Front RB-250 / Rear RB-172 
  • Includes Front and Rear Eye Bushings
  • Leaf Spring Material: 3/401 2ND 1/750
  • Location - Rear
  • 3/8" Center Bolt


Leaf spring 22-1221HD is the rear heavy duty leaf spring on a 1999-2018 Chevy, GMC Silverado and Sierra 1500 2 wheel and 4 wheel drive trucks. The rear spring is 2-1/2" wide, is a 4 (3/1) leaf spring and the capacity of this leaf spring is 2250 lbs. The OEM part number is 15033928.

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