MPA Electrical 7987611 Alternator

Remanufactured Alternator for GM Applications

This MPA Electrical remanufactured alternator is built for 12-volt charging systems and delivers 100 amps of output with an internal regulator. It uses a Delco-style design with an external fan, clockwise rotation, and a 6-groove serpentine pulley for direct-fit service on listed GM vehicles.

Fits 1987-1993 Chevrolet S10, N/A; fits 1991-1993 GMC Sonoma, N/A; and fits 1987-1992 Pontiac Firebird, N/A. Part number 7987611 is also referenced in interchange listings for related charging system applications.

Key Features

• Remanufactured alternator from MPA Electrical
• 100 amp output for 12-volt charging systems
• Internal voltage regulator
• Delco manufacturer style
• External fan design
• 6-groove serpentine pulley
• Clockwise rotation
• Clock position: 11:00

Product Details

Part number 7987611 is a remanufactured alternator for a range of GM cars and light trucks, including Chevrolet S10, GMC Sonoma, and Pontiac Firebird applications. The 100 amp rating supports standard vehicle electrical loads, while the internal regulator helps maintain charging control within the alternator assembly. The Delco-style configuration, 6-groove serpentine pulley, and clockwise rotation are important match points when replacing an existing unit.

This part cross-references BBB Industries 7860-11 and 7880-11 for the same application.

What This Alternator Helps Address

• Battery warning light caused by charging system output loss
• Weak battery charging during normal driving
• Dim lights or electrical instability from low alternator output
• Noise or wear related to a failing alternator assembly
• Replacement needs for Delco-style 12-volt GM charging systems

Installation Notes and Tips

Verify pulley groove count, rotation direction, regulator type, and clock position before installation. This alternator is listed with an 11:00 clock position and a 6-groove serpentine pulley, so matching the removed unit is important for proper alignment and belt fitment. Confirm the vehicle’s charging system configuration and connector style against the original part number 7987611 before installation.

Quality Assurance

MPA Electrical remanufactured parts are rebuilt for service replacement use and are listed here with defined electrical and mounting specifications to support accurate fitment selection. Review the vehicle application details and interchange references before ordering to confirm the correct alternator for your Chevrolet S10, GMC Sonoma, or Pontiac Firebird.