84757389 Rear Steel Drive Axle Shaft — 33-Spline, 40-5/16" | 2020–2025 Chevy Silverado 3500 HD / GMC Sierra 3500 HD

When your 2020-2025 Chevrolet Silverado 3500 HD or GMC Sierra 3500 HD needs a rear drive axle shaft, the US Powertrain 447-11312 delivers a fully new — not remanufactured — replacement built to withstand the demands of heavy-duty truck duty cycles. US Powertrain engineers evaluate original equipment designs before production, identifying and correcting known design deficiencies so that every shaft that leaves the facility is an improvement over what the vehicle came with from the factory. The 447-11312 is machined from steel to precise dimensional specifications: a 33-spline inboard engagement and a 40-5/16" inner shaft length that replicates the OE geometry for true drop-in fitment. A rust-resistant coating protects the shaft surface from corrosion, extending service life in the salt, mud, and moisture environments that heavy-duty truck owners encounter daily. Manufactured in the United States, this shaft is a natural choice for shops and fleet operators who prioritize domestic sourcing and consistent quality. Whether you are returning a working truck to service after axle shaft failure or replacing a cracked or bent shaft before it causes a breakdown, the US Powertrain 447-11312 provides the new-part confidence that remanufactured alternatives cannot match.

US Powertrain New Rear Drive Axle Shaft - 33 Spline, 40-5/16" - 2020-2025 Chevrolet Silverado 3500 HD / GMC Sierra 3500 HD

Newly manufactured steel drive axle shaft — not remanufactured — providing new-part reliability and eliminating the wear variables of core-based alternatives.

33-spline inboard engagement and 40-5/16" inner shaft length match OE specifications exactly for direct bolt-in fitment on 2020-2025 Silverado 3500 HD and Sierra 3500 HD.

Rust-resistant coating applied to shaft surfaces protects against corrosion in road salt, mud, and moisture environments common in heavy-duty truck operation.

Manufactured in the United States — supporting domestic production and meeting the quality expectations of professional technicians and fleet operators.

US Powertrain engineers review OE designs prior to production and incorporate corrections for known design deficiencies, delivering a shaft engineered to outlast the original.

Fits both Chevrolet Silverado 3500 HD and GMC Sierra 3500 HD platforms (2020-2025), providing broad application coverage from a single part number.

WARNING: This product contains a chemical known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit www.p65warnings.ca.gov.

Brand: US Powertrain
UPC: 00810190614440
ABS Tone Ring Included: No
Axle Nut Included: No
Axle Shaft Seal Included: No
Bearing(s) Included: No
Brake Hardware Included: No
CV Joints Included: No
Grade Type: Regular
Inboard Spline Quantity: 33
Inner Shaft Length: 40 5/16"
Prop 65 - Long Label: This product may contain a chemical known to the state of California to cause cancer or birth defects. www.p65warnings.ca.gov
Prop 65 - Short Label: WARNING: Cancer – www.p65warnings.ca.gov
Prop 65 Y/N: Y
Rust Resistant Coating: YES
Shaft Material: Steel
Wheel Nuts Included: NO

Applications:

• 2020-2025 Chevrolet Silverado 3500 HD - PartType: Drive Axle Shaft - Position: Rear
• 2020-2025 GMC Sierra 3500 HD - PartType: Drive Axle Shaft - Position: Rear