Remy 21038 Alternator

Remanufactured Alternator for GM Vans

The Remy 21038 is a premium remanufactured 12-volt alternator built for GM full-size vans and related applications that require a 105-amp charging output. It features an internal voltage regulator, external fan design, clockwise rotation, and a supplied pulley for direct replacement service.

Built on Delco/Delphi OE manufacturer specifications, this alternator is a practical choice for restoring stable charging performance in Chevrolet G30 and GMC G3500 applications, along with other listed GM van fitments. The Remy 21038 is also a direct cross-reference for common OE numbers used in these vehicles.

Key Features

• 105-amp amperage rating for vehicles equipped with the correct charging system
• 12-volt remanufactured alternator construction
• Internal voltage regulator for integrated charging control
• External fan type and clockwise rotation
• Pulley included for replacement convenience
• OE manufacturer reference: Delco/Delphi
• Part number 21038 for catalog and fitment matching

Detailed Fitment and Application

Compatible With 1992-1996 Chevrolet G10, G20, and G30; 1992-1996 GMC G1500, G2500, and G3500; 1993 Chevrolet Astro; and 1993 GMC Safari when the vehicle is equipped with the listed 105-amp configuration. For 1993 models, fitment notes include a 3:00 alternator plug on G10, G20, G30, G1500, G2500, and G3500. For 1992 models, fitment notes specify Opt HD. For 1996 Chevrolet G30 and GMC G3500, fitment is tied to VIN N or VIN K applications with 105 amps.

This Remy 21038 alternator is a direct replacement option for owners servicing Chevrolet G30 and GMC G3500 charging systems, especially where the original unit matches the 105-amp specification. It cross-references OE part numbers 10463389 and 10463413 for the same application.

What This Alternator Helps Address

• Low battery charging caused by a worn alternator
• Dim lights or electrical instability at idle
• Battery warning light concerns related to charging output
• Voltage irregularities from a failing internal regulator
• Noise or belt-drive issues associated with an aging alternator assembly

Installation Notes and Tips

Verify the vehicle’s amperage requirement before ordering; this unit is not for vehicles with less than 105 amps capacity. Confirm the alternator plug style, VIN code where listed, and pulley alignment before installation. Match the clockwise rotation and internal regulator configuration to the original unit for proper operation.

Quality Assurance

Remy Premium Remanufactured parts are remanufactured to OE-style specifications for electrical system service. This alternator is built to match the listed Delco/Delphi application requirements and is intended for direct replacement use in the confirmed GM fitments.