TYC 2-13771 Alternator

TYC 2-13771 Alternator Overview

TYC 2-13771 is a 125-amp alternator for select Chevrolet, Oldsmobile, and Pontiac applications. It features an internal fan, internal voltage regulator, a regular pulley with 6 grooves, and clockwise rotation for OE-style charging system replacement.

Compatible With 2000-2005 Chevrolet Impala and 2000-2005 Chevrolet Monte Carlo, plus 1999-2001 Oldsmobile Silhouette and 1999-2001 Pontiac Montana. This alternator is built for vehicles that require internal regulator and internal fan configuration.

Key Features

• 125A power generation for charging system output
• Internal regulator position for OE-style electrical control
• Internal fan position for compact alternator packaging
• Regular pulley design with 6 grooves
• Clockwise rotation direction
• OE manufacturer reference: BO
• Cross-reference part numbers include ACDelco 334-1321A and Bosch AL8501N

Detailed Description

TYC 2-13771 is an alternator replacement built around the original equipment configuration used on select GM vehicles. The 125-amp output supports the charging demands of the vehicle’s electrical system, while the internal regulator and internal fan match the factory-style layout for the listed applications. For buyers searching for a Chevrolet Impala alternator, Chevrolet Monte Carlo alternator, or a replacement alternator for Oldsmobile Silhouette and Pontiac Montana models, this unit provides the specified fitment and electrical configuration.

This part cross-references ACDelco 334-1321A and Bosch AL8501N for the same application.

Common Problems This Part Can Address

• Battery warning light caused by alternator output loss
• Low charging voltage during driving
• Dim lights or unstable electrical performance
• Charging system failure from worn internal components
• Noise or irregular operation from a failing alternator assembly

Installation Notes and Tips

Verify pulley groove count, rotation direction, and regulator/fan position before installation. Confirm the vehicle’s charging system connectors and belt routing match the listed application. After installation, check charging voltage at the battery and inspect belt condition and tension to confirm proper operation.

Quality Assurance

TYC manufactures this alternator to OE-style specifications for the listed applications, with fitment and electrical configuration aligned to the original design requirements.