Remy 20405 Alternator

Reliable Alternator for Buick, Chevrolet, Oldsmobile, and Pontiac Vehicles

The Remy Premium Remanufactured Alternator 20405 is designed to restore charging system performance in select Buick, Chevrolet, Oldsmobile, and Pontiac models. Engineered to meet OE specifications, this 12-volt alternator delivers consistent 85-amp output with an internal voltage regulator for stable electrical system operation.

• Amperage Rating: 85 amps for reliable charging
• Fan Type: External fan for effective cooling
• Remanufactured to OE standards by Delco/Delphi
• Pulley Included for direct replacement
• Clockwise rotation direction
• Voltage: 12 volts with internal voltage regulator

About the Premium Remanufactured Product Line

The Premium Remanufactured line from Remy offers alternators rebuilt to meet or exceed original equipment manufacturer (OEM) specifications. Each unit undergoes thorough testing and quality checks to ensure durability and performance comparable to new parts. This line provides a cost-effective solution for restoring electrical charging systems in vehicles without compromising reliability.

Product Details and Specifications

This Remy alternator, part number 20405, is specifically compatible with Buick Cavalier, Chevrolet Cavalier and Corsica, Oldsmobile Firenza, Pontiac Skyhawk, and Tempest models. It features an external fan design to maintain optimal operating temperatures and includes the pulley for straightforward installation. The clockwise rotation and internal voltage regulator ensure proper fit and function within the vehicle's charging system.

Common Applications and Issues Addressed

• Restores charging system output in Buick Cavalier and Chevrolet Corsica
• Replaces failing or noisy alternators in Oldsmobile Firenza
• Solves battery drain and electrical system malfunctions in Pontiac Skyhawk
• Addresses voltage regulation problems in Pontiac Tempest
• Eliminates charging warning lights and intermittent power loss

Installation Notes and Tips

Before installation, verify the alternator's amperage rating and rotation direction match the vehicle's requirements. The included pulley allows for direct replacement without additional parts. Ensure battery terminals are disconnected to prevent electrical shorts during installation. After mounting, check belt tension and electrical connections for secure fitment and proper operation.

Quality Assurance and Warranty

Remy Premium Remanufactured alternators are tested to meet OE performance standards. Each unit includes an internal voltage regulator and is rebuilt using quality components from the original Delco/Delphi manufacturer. While specific warranty details may vary, these alternators typically come with a limited warranty covering defects in materials and workmanship to provide confidence in long-term reliability.