BIG BORE XD® Steering Gears – GMC 2500/3500HD & Hummer H2 (1999–2010)-PSC Certified Refurbished
BIG BORE XD® Steering Gears – GMC 2500/3500HD & Hummer H2 (1999–2010)-PSC Certified Refurbished
Part Number: SD-SG038
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If your steering gear is leaking, developing excessive play, or no longer delivering the steering performance your truck deserves, these PSC Certified Refurbished BIG BORE XD® Steering Gears offer a cost-effective way to get back on the road or trail.
These are PSC BIG BORE XD® Steering Gears offered as PSC Certified Refurbished units.
Each gear has been inspected, rebuilt where necessary, and tested to meet PSC performance standards. While refurbished units may show minor cosmetic wear from previous use or handling, they are fully functional and built to perform the same as our standard units.
Designed for GMC 2500HD, GMC 3500HD, and Hummer H2 applications, the BIG BORE XD® Steering Gear is engineered to address the common weaknesses found in factory steering systems. Featuring PSC's upgraded internal components, including a heavy-duty sector shaft and enhanced bearing support, these gears are built to handle oversized tires, lifted suspensions, towing, and demanding off-road conditions.
Whether you're restoring steering performance on a daily driver, improving control on a work truck, or replacing a worn steering gear in a trail rig, these refurbished units provide the same proven PSC design at a lower cost.
Available in standard and Cylinder Assist® compatible configurations, these steering gears deliver the durability and steering authority PSC is known for without the cost of a new unit.
If your current steering gear has seen better days, this is a budget-friendly way to upgrade with a gear that has been rebuilt, inspected, and tested by the PSC team.
All refurbished unit sales are final.

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Tech Info
Heads‑up for installers
- Designed to work with factory 3-Spline pitman arm
- Make sure to flush and bleed the system properly.
- Cylinder Assist version includes ports for ram assist plumbing.
Fitment
- Vehicles: GM 2500/3500 4x4 & Hummer H2
- Years: 1999–2010
- Note: SG038R is for use with PSC Cylinder Assist® systems.
Specs
- Sector Shaft: 3 Spline 45 mm diameter (works with factory pitman arm)
- Bearings: Upgraded roller bearings
- Ports: Standard or Cylinder Assist® (SG038R)
What’s included
(1) BIG BORE XD Steering Gear (choose standard or Cylinder Assist)
California Prop 65 Warning
This product can expose you to chemicals including lead and di (2-ethylhexyl) phthalate, which are known to the State of California to cause cancer, birth defects or other reproductive harm.
For more information, go to www.P65Warnings.ca.gov