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USD 4923.3
Part #: CSTCSK-C23-21

CST 9"-11" Lift Kit CSK-C23-21

2001-2010 GM 2500HD 2WD/4WD
Part #: CSTCSK-C23-21
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The CST 9"-11" Lift Kit CSK-C23-21 is the perfect way to add some height to your 2001-2010 GM 2500HD 2WD/4WD Pickup. The popular 9"-11" lift includes the needed components to lift the front and rear of your truck with plenty of clearance for 37" tires at an affordable price. 

This kit requires no cutting of the front differential or welding for installation. It maintains the factory track width and will drop down the factory suspension a true nine inches, ensuring that the factory steering and control arm geometry will remain within factory specifications. Like many other CST lifts, this kit includes the unique one-piece sub-frame with strut bar supports, supported upper control arm drop mounts, steering drop down w/ heim jointed support links, and the differential drop. All covered in a high quality gloss black powdercoat finish.  This kit also includes rear leaf springs, CST uni-ball gen II dirt-series UCA kit and dual shock hoops. 

Wheel & Tire Guidelines:

37x12.5" or 13.5 no trimming on 8"-11" wide wheels. 
38x13.5" or 14.5 tires with minor trimming on 9"-10" wide wheels. 
38x15.5" on 9"-10" wide wheels requires trimming (set kit to 11")
40x13.5 on 9" wide wheels requires trimming (set kit to 11")


  • 9"-11" Lift Kit 
  • Improved Ride & Handling 
  • Minimal CV Angle Changes 
  • Maintains O.E. Track Width 
  • Fits Up To 37" Tall Tire (See Notes Below)
  • No Cutting Or Welding Required For Installation 
  • Shocks Not Included 
Notes - Please Read For Additional Required Components:
Other wheel and tire sizes will be up to the installer to determine fitment, installation, and trimming if needed. 
Aftermarket bumpers greatly increase tire clearance. 
Trucks with 2-piece rear driveshaft require carrier shim. 
Driveshaft upgrade recommended for frequent highway use in 4WD. 

3500HD Owners: This kit was designed and tested for the 2500HD trucks. It can be used on 3500HD and 3500HD Dually if the purchaser / installer is able to provide custom u-bolts for their application. Due to the many different spring and axle configurations, u-bolts are not included or offered for the 3500HD models. Neither XDP or CST offer u-bolts for these applications. You must be able to source them locally. Custom carrier bearing spacer may be required as well.
 Truck Freight Item: Allow 1-2 Weeks for delivery. Truck freight charges apply.


  • MFG. Number CSK-C23-21
  • Manufacturer Name CST Performance Suspension
  • Shipping Weight 350.00 lb.
  • Shipping Length 100 in.
  • Shipping Width 100 in.
  • Shipping Height 100 in.
  • Fuel Type Diesel / Gas
  • Lift Height 9", 11"
  • Prop 65 WARNING: Cancer & Reproductive Harm -


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