MPA Electrical 15721 Alternator

Remanufactured Alternator for GM HD Trucks

The MPA Electrical Remanufactured Alternator, part number 15721, is a 12-volt charging system component built for select Chevrolet and GMC applications. It delivers 145 amps and uses an internal regulator, internal fan, and a 6-groove serpentine clutch pulley for the specified OE-style setup.

This remanufactured Delco alternator is built for vehicles that need stable charging output in demanding truck and utility use. The 3:00 clock position and clockwise rotation help match the original mounting and belt routing requirements.

Key Features

• 145 amp output for 12-volt charging systems
• Internal regulator for integrated voltage control
• Internal fan for alternator cooling
• 6-groove serpentine clutch pulley
• Clock position: 3:00
• Clockwise rotation
• Remanufactured Delco unit from MPA Electrical

Fitment Details

• Fits 2006-2007 Chevrolet Silverado 2500 HD, with 145 amp alternator; remanufactured.
• Fits 2007 Chevrolet Silverado 2500 HD Classic, single alt system; remanufactured.
• Fits 2007 Chevrolet Silverado 3500 Classic, single alt system; remanufactured.
• Fits 2006-2007 GMC Sierra 2500 HD, with 145 amp alternator; remanufactured.
• Fits 2007 GMC Sierra 2500 HD Classic, single alt system; remanufactured.
• Fits 2007 GMC Sierra 3500 Classic, single alt system; remanufactured.
• Fits 2006 Chevrolet Silverado 3500, with 145 amp alternator; remanufactured.
• Fits 2005-2006 Chevrolet SSR, remanufactured.
• Fits 2006 Chevrolet Trailblazer, remanufactured.
• Fits 2006 GMC Sierra 3500, with 145 amp alternator; remanufactured.

What This Alternator Helps Address

• Low battery charging output
• Battery warning light or charging system fault
• Dim lights caused by weak alternator performance
• Electrical instability under load
• Charging issues on Chevrolet Silverado and GMC Sierra HD trucks

Installation Notes and Tips

Verify the vehicle uses a 145 amp alternator and a single alternator system where noted before installation. Confirm pulley groove count, clock position, rotation, and connector/pulley match the original unit on the vehicle. For Chevrolet Silverado 2500 HD, GMC Sierra 2500 HD, and related applications, compare the removed alternator to part number 15721 before installation.

This part cross-references BBB Industries 8489 for the same application.

Quality Assurance

MPA Electrical remanufactures this alternator to meet the listed Delco-style specifications for the stated applications. Part number 15721 is built around the required amperage, pulley, and regulator configuration for the fitment shown.