Remy 20409 Alternator

Remanufactured Alternator for Buick and Oldsmobile

Remy Premium Remanufactured Part Number 20409 is a 12-volt alternator built for direct replacement in select Buick and Oldsmobile applications. It delivers 74 amps, uses an internal voltage regulator, and includes a pulley for a straightforward charging-system replacement.

Compatible with 1989-1991 Buick Skylark and 1989-1991 Oldsmobile Cutlass Calais, this alternator is a fitment-based solution for restoring stable battery charging and electrical output. The Remy Premium Remanufactured line focuses on OE-style replacement coverage for vehicles that need dependable charging performance.

Key Features

• Remanufactured alternator for 12-volt charging systems
• 74 amp output for factory-style electrical performance
• Internal voltage regulator for integrated control
• External fan design
• Clockwise rotation
• Pulley included
• OE manufacturer reference: Delco/Delphi
• Part number 20409 for application matching

Detailed Description

Remy 20409 is a premium remanufactured alternator engineered for vehicles originally equipped with a Delco/Delphi-style charging system. The 74 amp rating supports the electrical demands of the original application, while the internal regulator helps maintain charging output within the vehicle’s designed operating range. This unit is listed for 1989-1991 Buick Skylark and 1989-1991 Oldsmobile Cutlass Calais, making it a direct-fit replacement for those model years. If you are searching for a Remy 20409 alternator for Buick Skylark or a Remy 20409 alternator for Oldsmobile Cutlass Calais, this part matches the confirmed fitment shown here.

This part cross-references 8C5510 and 224410 for the same application.

What It Helps Fix

• Low battery charging output
• Battery warning light concerns related to alternator performance
• Dim lights caused by weak charging voltage
• Electrical instability from a failing alternator
• Starting issues caused by insufficient system charge

Installation Notes and Tips

Verify pulley style, rotation direction, amperage rating, and regulator type against the original unit before installation. Confirm belt alignment and electrical connector condition during replacement. Because this alternator is listed for specific Buick Skylark and Oldsmobile Cutlass Calais applications, match the vehicle year and charging-system configuration to the fitment data before ordering.

Quality Assurance

Remy Premium Remanufactured parts are remanufactured to support OE-style replacement needs using application-specific specifications tied to the original Delco/Delphi design.