Remy 21747 Alternator

Remanufactured Alternator for OE-Style Charging Performance

The Remy Premium Remanufactured 21747 alternator is a 12-volt charging component built for direct replacement service on select GM minivans. It delivers 140 amps of output, uses an internal voltage regulator, and includes the pulley for a straightforward alternator replacement on the correct application.

Compatible with 1998 Oldsmobile Silhouette and 1998 Pontiac Trans Sport, this Delco/Delphi unit is a fitment-specific solution for drivers searching for a 1998 Oldsmobile Silhouette alternator 140 amp or a 1998 Pontiac Trans Sport alternator replacement. The Remy 21747 is also a practical match for shoppers comparing OE-style charging system parts by part number.

Key Features

• 140 amp amperage rating for charging-system service
• 12-volt alternator with internal voltage regulator
• Remanufactured unit for OE-style replacement use
• External fan design
• Pulley included
• Clockwise rotation
• OE manufacturer reference: Delco/Delphi
• Part number 21747 for easy catalog matching

Product Details

Remy Premium Remanufactured focuses on replacement electrical components built around original-equipment specifications. This alternator is intended for vehicles that use the Delco-style charging setup and is listed for the 1998 Oldsmobile Silhouette and 1998 Pontiac Trans Sport. If you are cross-shopping a Remy 21747 alternator for a 1998 GM minivan, this unit provides the key electrical and mechanical details needed for a proper match.

This part cross-references 10464403 and 10480347 for the same application.

Common Problems This Part Can Address

• Low battery charge caused by alternator output loss
• Battery warning light related to charging-system faults
• Dim lights or electrical instability at idle
• Charging issues after alternator wear or internal regulator failure
• Noise or belt-drive concerns tied to a failing alternator assembly

Installation Notes and Tips

Verify the vehicle’s original alternator configuration before installation, including 12-volt system requirements, clockwise rotation, external fan layout, and pulley style. Confirm the OE reference and part number 21747 against the removed unit to ensure the correct Delco/Delphi application for your Oldsmobile Silhouette or Pontiac Trans Sport.

After installation, check belt alignment, battery condition, and charging voltage at the terminals to confirm the system is operating correctly.

Quality Assurance

Remy Premium Remanufactured parts are remanufactured to serve as OE-style replacements for specified applications. This alternator is built around the listed Delco/Delphi design details and fitment data for 1998 Oldsmobile Silhouette and 1998 Pontiac Trans Sport.