N2120281X Center Support Bearing – For CHEVROLET GMC

This N2120281X center support bearing (also known as a carrier bearing or hanger bearing) provides a direct-fit replacement for a wide range of Chevrolet and GMC trucks and vans. It supports the driveshaft at the center point, reduces driveline vibration, and protects universal joints from premature wear. This bearing matches OE specifications including GM part numbers 88934865 and 12472456.

Technical Specifications

The bearing ID of 1.574 inches (40.00 mm) is the critical fitment spec for this bearing—this determines whether the bearing seats properly on your driveshaft. The centerline-to-centerline measurement of 6.620 inches (168.15 mm) determines whether the bracket aligns with your vehicle’s chassis mounting points. This is a 1330 series bearing with Style 17 configuration.

Important: All information on this page is for reference only. Please verify OE numbers, dimensions, and vehicle fitment against your original part before ordering. Contact us for fitment confirmation.

DH Code & OE Number & Reference Numbers

DH Code:

OE Numbers:
N2120281X, 212028-1X, 88934865, 12472456, 12479237

Reference Numbers (Interchange):
Spicer: 212028-1X
Timken: HB4016A
SKF: HB88540
National: HB88540
NAPA: HB88540
Neapco: N212028-1X

Vehicle Fitment

CHEVROLET: Avalanche (2002–2007), Silverado 1500/2500/3500 (1999–2007), Suburban (1999–2007), Tahoe (1999–2007), Express (1996–2012)

GMC: Sierra 1500/2500/3500 (1999–2007), Yukon (1999–2007), Savana (1996–2012)

Fitment note: This bearing fits Chevrolet and GMC full-size trucks and vans equipped with a 2-piece driveshaft and U-shaped bracket with studs. Please verify OE number, dimensions and vehicle configuration before ordering.

Product Features

• Direct OE replacement. This bearing matches GM OE specifications 88934865 and 12472456 for a wide range of Chevrolet and GMC trucks and vans.
• Precision-engineered fitment. Features a 40mm (1.574″) bore diameter and 168.15mm center-to-center mounting hole spacing for exact vehicle compatibility.
• 1330 series design. Engineered for demanding truck and van applications requiring robust driveline support.
• Rubber bushing construction. The rubber bushing absorbs and isolates driveline vibrations, protecting universal joints and other driveline components from excess stress.
• Complete assembly. Includes bearing, support, U-shaped bracket, and pressfit studs for a complete installation.
• Driveline support. Supports the driveshaft to ensure stability and reduce vibration during high-speed rotation.
• Universal joint protection. Helps protect the universal joint and extend its service life.

Installation Notes

• Verify fitment. Confirm this bearing matches your original bearing specifications before installation.
• Check your vehicle configuration. This bearing is designed for vehicles with a 2-piece driveshaft and U-shaped bracket with studs. Verify your specific model, year, and drivetrain before ordering.
• Verify the bore diameter. This bearing is designed for a 40mm (1.574″) bore diameter. If your vehicle has a different size, this part won’t fit.
• Check mounting dimensions. Verify the bracket width (1.500″), centerline-to-mounting (2.250″), and centerline-to-centerline (6.620″) measurements against your original bearing before installation.
• Professional installation recommended. Proper alignment during installation is critical to prevent premature wear and driveline vibration issues.

About DUHUI Bearing

Manufactured by DUHUI Bearing – an automotive bearing supplier established in Zhejiang, China, in 2003. DUHUI produces center support bearings, wheel hub bearings, and related components to OE specifications. Contact us

For fitment questions, compare your old part number against the OE numbers listed above.