Remy 21822 Alternator

Remanufactured Alternator for GM 4.3L Applications

The Remy 21822 is a premium remanufactured 12-volt alternator built for GM truck and SUV charging systems that use a 100-amp output. It features an internal voltage regulator, internal fan, clockwise rotation, and an included pulley for direct replacement service.

Compatible With 2001-2005 Chevrolet Blazer, 2001-2005 GMC Jimmy, 2001-2004 Chevrolet S10, 2001-2004 GMC Sonoma, and 2001 Oldsmobile Bravada applications that call for this alternator configuration. The Remy Premium Remanufactured line focuses on OE-style electrical replacement parts for common charging-system repairs.

Key Features

• Remy Part Number 21822
• 100-amp amperage rating for factory-style charging output
• 12-volt alternator with internal voltage regulator
• Internal fan design
• Clockwise rotation
• Pulley included
• Remanufactured unit for charging-system replacement
• OE manufacturer reference: Delco/Delphi

Detailed Description

Remy 21822 is a remanufactured alternator engineered for vehicles using Delco/Delphi-style charging hardware. It is a practical replacement for Chevrolet Blazer and S10, GMC Jimmy and Sonoma, and Oldsmobile Bravada models within the listed years. If you are replacing a worn alternator on a 2001-2005 Chevrolet Blazer or a 2001-2004 GMC Sonoma, this unit provides the specified 100-amp output, internal regulation, and clockwise rotation needed for the application.

This part cross-references Delco/Delphi OE numbers 10464462 and 10480288 for the same application.

What It Helps Fix

• Low battery charge or repeated battery drain
• Dim headlights or unstable electrical output
• Battery warning light on the dash
• Charging-system failure caused by a worn alternator
• Voltage irregularities affecting vehicle electronics

Installation Notes and Tips

Verify the original alternator matches the 100-amp rating, internal regulator setup, clockwise rotation, and pulley configuration before installation. Confirm connector style and mounting points against the removed unit, especially on 2001-2005 Chevrolet Blazer and GMC Jimmy applications and 2001-2004 Chevrolet S10 and GMC Sonoma applications. Always inspect the battery, belt condition, and charging cables during alternator replacement to help prevent repeat failures.

Quality Assurance

Remy Premium Remanufactured parts are remanufactured to support OE-style replacement needs for electrical and charging-system service. Part number 21822 is built as a direct-fit alternator solution for the listed GM applications.