Remy 20402 Alternator

Reliable Alternator for Chevrolet, GMC, and Oldsmobile Vehicles

The Remy Premium Remanufactured Alternator 20402 is designed to restore proper charging system function in select Chevrolet, GMC, and Oldsmobile models. This remanufactured alternator delivers a 105-amp output with an internal voltage regulator and includes a pulley for straightforward replacement.

Key Features of Remy Alternator 20402

• Amperage Rating: 105 amps for consistent electrical performance
• Fan Type: External fan for effective cooling
• Remanufactured unit ensuring quality and reliability
• OE Manufacturer: Delco/Delphi, meeting original equipment standards
• Includes pulley for direct replacement
• Rotation Direction: Clockwise to match vehicle specifications
• Voltage: 12 volts with internal voltage regulator
• Part Status: Superseded to part number 20457

About the Premium Remanufactured Product Line

The Premium Remanufactured line by Remy offers alternators that have been carefully rebuilt to meet or exceed original equipment specifications. This process includes thorough testing and replacement of worn components, ensuring dependable performance and compatibility with your vehicle’s electrical system. The 20402 alternator is part of this line, providing a cost-effective solution without compromising quality.

Detailed Product Description

This Remy alternator 20402 is engineered for use in a range of Chevrolet, GMC, and Oldsmobile vehicles, including models such as the Chevrolet Blazer, GMC Sierra C1500, and Oldsmobile Lumina. It features a 105-amp output suitable for standard electrical loads and an external fan design to maintain optimal operating temperatures. The clockwise rotation and included pulley ensure proper fitment and function. The internal voltage regulator simplifies installation by eliminating the need for an external regulator. Note that this part has been superseded to Remy part number 20457, but 20402 remains a reliable option for compatible vehicles.

Common Applications and Issues Addressed

• Restores charging system functionality in Chevrolet Blazer and GMC Jimmy models
• Resolves battery drain and electrical system failures in GMC C1500 and C2500 trucks
• Replaces faulty alternators causing dimming lights or starting problems in Oldsmobile Lumina
• Addresses overheating issues with external fan cooling design
• Corrects voltage irregularities with internal voltage regulator

Installation Notes and Tips

Ensure the alternator rotation direction matches your vehicle’s requirements; this unit rotates clockwise. Verify compatibility with your specific make and model before installation. Since the pulley is included, no additional pulley replacement is necessary. Follow manufacturer torque specifications when mounting the alternator to avoid damage.

Quality Assurance and Warranty

Remy’s Premium Remanufactured alternators undergo comprehensive testing to meet original equipment standards. While specific warranty details are not provided here, Remy products typically come with a limited warranty covering defects in materials and workmanship. Consult your supplier for exact warranty terms.