Remy 21798 Alternator

Remanufactured 105 Amp Alternator for GM Trucks

The Remy 21798 is a premium remanufactured alternator built for 12-volt charging systems with a 105 amp output. It uses an internal voltage regulator, internal fan, clockwise rotation, and includes the pulley for a direct replacement on select Chevrolet and GMC applications.

Compatible With 2000-2005 Chevrolet Silverado, 2000-2005 GMC Sierra, and related GM full-size truck and SUV platforms, this alternator is a fit-focused replacement for vehicles using the Delco/Delphi style 4-pin alternator plug. The Remy 21798 is also cross-referenced to 10464455 and 10480326 for the same application.

Key Features

• 105 amp amperage rating for standard charging-system replacement
• 12-volt alternator with internal voltage regulator
• Internal fan design and clockwise rotation
• Pulley included for application-specific replacement
• Premium remanufactured unit from Remy
• OE manufacturer reference: Delco/Delphi

Product Details

Remy Premium Remanufactured parts are rebuilt to restore core charging-system function with application-specific fitment in mind. Part number 21798 is an alternator for GM trucks and SUVs that require a 105 amp Delco-style unit, including many Chevrolet Silverado, GMC Sierra, Tahoe, Yukon, Suburban, Avalanche, Express, Savana, and Cadillac Escalade models listed in the fitment data. If you are searching for a 2000-2004 Chevrolet Silverado alternator, a 2001-2004 GMC Sierra alternator, or a 2002-2004 Cadillac Escalade charging replacement, this unit matches those vehicle-specific requirements.

This alternator is built for vehicles with the correct 105 amp capacity and the specified 4-pin alternator plug on applicable 2005 models. It is a direct replacement option for drivers addressing charging-system wear on GM full-size trucks and SUVs, including Silverado 1500, Sierra 1500, Tahoe, Yukon XL, and Suburban applications.

What This Alternator Helps Address

• Battery warning lights caused by charging-system output loss
• Low-voltage conditions during driving or idle operation
• Dim lights and electrical accessories that are not receiving stable power
• Alternator noise or bearing-related charging concerns
• Failure on GM truck and SUV applications using a 105 amp Delco-style alternator

Installation Notes and Tips

• Verify the vehicle uses a 105 amp alternator before ordering.
• Confirm the connector style, especially on 2005 Chevrolet and GMC applications with a 4-pin alternator plug.
• Match pulley and rotation requirements to the original unit.
• Inspect the battery, belt, and charging connections during replacement to help confirm proper system operation.
• Use the vehicle fitment notes to confirm the exact year and model before installation.

Quality Assurance

Remy Premium Remanufactured components are remanufactured to support OE-style replacement needs for charging-system service. The Remy 21798 is built around Delco/Delphi application requirements and is listed for a wide range of GM truck and SUV fitments, including Chevrolet Silverado and GMC Sierra platforms.