Remy 12738 Alternator

Remanufactured Alternator for GM 3.5L/3.9L Applications

Remy Premium Remanufactured Alternator Part Number 12738 is a 12-volt charging system component built for select Buick, Chevrolet, and Pontiac vehicles. With 135 amps of output, an internal voltage regulator, and an internal fan, it is configured for dependable electrical performance in compatible OE-style applications.

Key Features

• 135 amp amperage rating for steady charging output
• 12V alternator with internal voltage regulator
• Internal fan design for integrated cooling
• Clockwise rotation
• Pulley included
• Remanufactured to Premium Remanufactured standards
• OE manufacturer reference: Nippondenso

Product Details

Remy 12738 is a remanufactured alternator for vehicles that use a Nippondenso-style charging system. It is built for direct replacement in applications such as the 2008-2009 Buick Allure, 2008-2009 Buick LaCrosse, 2006-2009 Chevrolet Impala, 2005-2008 Pontiac Grand Prix, and 2006-2007 Chevrolet Monte Carlo. This part cross-references 104210-4220 and 15139480 for the same application.

The Premium Remanufactured line focuses on OE-style fit and function for charging system service. For buyers searching for a 135 amp alternator for a 2006-2009 Chevrolet Impala or a remanufactured alternator for a 2005-2008 Pontiac Grand Prix, Part Number 12738 matches the listed vehicle coverage and electrical specifications.

Common Problems This Part Can Address

• Battery warning light caused by low charging output
• Dim headlights or unstable electrical performance
• Battery discharge from a failing alternator
• Charging system noise related to worn internal components
• Voltage irregularities in the vehicle electrical system

Installation Notes and Tips

Verify the vehicle’s original alternator specifications before installation, including amperage, rotation direction, voltage, and regulator type. Confirm pulley style and OE manufacturer match for the listed application. After installation, check charging voltage at idle and under load to confirm proper system operation.

Quality Assurance

Remy Premium Remanufactured parts are remanufactured charging components built around OE-style specifications for the listed applications. Part Number 12738 is identified for direct-fit use in the supported Buick, Chevrolet, and Pontiac models shown above.