Remy 20414 Alternator

Remanufactured 105-Amp Alternator for GM Vans and Trucks

Restore charging performance with the Remy Premium Remanufactured 20414 alternator. This 12-volt unit delivers 105 amps, uses an internal voltage regulator, and includes the pulley for a direct replacement on select Chevrolet and GMC applications.

Built as a remanufactured replacement for Delco/Delphi applications, this alternator is a fit-focused option for owners servicing classic GM vans, SUVs, and trucks from the late 1980s and early 1990s. The clockwise rotation and external fan configuration match the listed vehicle applications.

Key Features

• 105-amp amperage rating for steady charging output
• 12-volt alternator with internal voltage regulator
• Remanufactured Premium Remanufactured unit from Remy
• OE manufacturer reference: Delco/Delphi
• Pulley included
• Clockwise rotation
• External fan type
• Part number 20414 for easy identification

Detailed Product Overview

Remy 20414 is a premium remanufactured alternator for select Chevrolet G10, G20, G30, Astro, Blazer, R10, R20, V10, C/K-series, and GMC G1500, G2500, G3500, Jimmy, Safari, R1500, R2500, V1500, C/K-series applications. It is listed across 1987-1991 model years, with specific notes for 4-groove pulley, without A/C, and 4-pin alternator plug configurations where applicable. If you are replacing a worn charging unit on a Chevrolet G20 or GMC G3500, part number 20414 provides the specified 105-amp output and OE-style electrical layout.

This part cross-references 1101582 and 10463044 for the same application.

Common Problems This Alternator Can Address

• Battery warning light caused by weak charging output
• Low system voltage at idle or under electrical load
• Dim headlights or slow accessory performance
• Charging failure from a worn internal regulator or diode circuit
• Noise or belt-related issues tied to a failing alternator assembly

Installation Notes and Fitment Tips

• Fits 1987-1991 Chevrolet G10, N/A, with 4-groove pulley and 105 amps.
• Fits 1988-1991 Chevrolet G10, N/A, without A/C and 105 amps.
• Fits 1987-1991 Chevrolet G20, N/A, with 4-groove pulley and 105 amps.
• Fits 1988-1991 Chevrolet G20, N/A, without A/C and 105 amps.
• Fits 1987-1991 Chevrolet G30, N/A, with 4-groove pulley and 105 amps.
• Fits 1987-1989 Chevrolet Astro, N/A, without A/C and 105 amps.
• Fits 1988-1989 Chevrolet C1500, N/A, without A/C and 105 amps.
• Fits 1988-1989 Chevrolet C2500, N/A, without A/C and 105 amps.
• Fits 1988-1989 Chevrolet C3500, N/A, without A/C and 105 amps.
• Fits 1988-1989 Chevrolet K1500, N/A, without A/C and 105 amps.
• Fits 1988-1989 Chevrolet K2500, N/A, without A/C and 105 amps.
• Fits 1988-1989 Chevrolet K3500, N/A, without A/C and 105 amps.
• Fits 1987 Chevrolet Blazer, N/A, with 4-pin alt plug and standard configuration.
• Fits 1987 Chevrolet R10, N/A, with 4-pin alt plug and 4-groove pulley.
• Fits 1987 Chevrolet R10 Suburban, N/A, with 4-pin alt plug and 4-groove pulley.
• Fits 1987 Chevrolet R20, N/A, with 4-pin alt plug and 4-groove pulley.
• Fits 1988 Chevrolet R20, N/A, without A/C and 105 amps.
• Fits 1987 Chevrolet V10, N/A, with 4-pin alt plug and 4-groove pulley.
• Fits 1987-1991 GMC G1500, N/A, with 4-groove pulley and 105 amps.
• Fits 1988-1991 GMC G1500, N/A, without A/C and 105 amps.
• Fits 1987-1991 GMC G2500, N/A, with 4-groove pulley and 105 amps.
• Fits 1988-1991 GMC G2500, N/A, without A/C and 105 amps.
• Fits 1987-1991 GMC G3500, N/A, with 4-groove pulley and 105 amps.
• Fits 1989 GMC Jimmy, N/A, without A/C and 105 amps.
• Fits 1987 GMC Jimmy, N/A, with 4-pin alt plug and standard configuration.
• Fits 1987-1989 GMC Safari, N/A, without A/C and 105 amps.
• Fits 1987 GMC R1500, N/A, with 4-pin alt plug and 4-groove pulley.
• Fits 1987 GMC R1500 Suburban, N/A, with 4-pin alt plug and 4-groove pulley.
• Fits 1987 GMC R2500, N/A, with 4-pin alt plug and 4-groove pulley.
• Fits 1987 GMC V1500, N/A, with 4-pin alt plug and 4-groove pulley.

Quality Assurance

Remy Premium Remanufactured parts are remanufactured to meet the listed OE-style application requirements for Delco/Delphi-based charging systems. Verify pulley, plug style, A/C configuration, and amperage before installation to confirm the correct match for your vehicle.