MPA Electrical 7991611N Alternator

100 Amp Alternator for GM Applications

MPA Electrical 7991611N is a new 12-volt alternator built for GM charging-system applications that use a Delco-style unit with an internal regulator, external fan, and 6-groove serpentine pulley. It delivers 100 amps and is configured with a clockwise rotation and 11:00 clock position for direct-match replacement needs.

Key Features

• 100 amp output for steady charging performance
• 12-volt alternator with internal regulator
• External fan design
• 6-groove serpentine pulley
• Clockwise rotation with 11:00 clock position
• Delco manufacturer style
• New MPA Electrical replacement part

Detailed Product Overview

The MPA Electrical 7991611N alternator is built for vehicles that require a Delco-style charging unit with the listed electrical and mounting specifications. This part number 7991611N is a direct-fit style replacement for a wide range of Chevrolet, GMC, Buick, Cadillac, Oldsmobile, and Pontiac applications from 1987-1993, including Chevrolet Caprice, Chevrolet C1500, GMC K1500, and Chevrolet Camaro. It is also listed for several air-conditioned truck, van, and utility applications that use the same 100 amp, 6-groove serpentine setup.

This part cross-references BBB Industries 7861-11 for the same application.

Vehicle Fitment

• Fits 1991-1993 Chevrolet Caprice, N/A
• Fits 1992-1993 Chevrolet Caprice, N/A
• Fits 1991-1992 Buick Roadmaster, N/A
• Fits 1991-1992 Cadillac Brougham, N/A
• Fits 1992 Cadillac Commercial Chassis, N/A
• Fits 1988-1992 Chevrolet C1500, N/A, fits vehicles with air conditioning
• Fits 1988-1992 Chevrolet C2500, N/A, fits vehicles with air conditioning
• Fits 1988-1992 Chevrolet C3500, N/A, fits vehicles with air conditioning
• Fits 1990-1992 Chevrolet Camaro, N/A
• Fits 1988-1992 Chevrolet K1500, N/A, fits vehicles with air conditioning
• Fits 1988-1992 Chevrolet K2500, N/A, fits vehicles with air conditioning
• Fits 1988-1992 Chevrolet K3500, N/A, fits vehicles with air conditioning
• Fits 1988-1992 GMC C1500, N/A, fits vehicles with air conditioning
• Fits 1988-1992 GMC C2500, N/A, fits vehicles with air conditioning
• Fits 1988-1992 GMC C3500, N/A, fits vehicles with air conditioning
• Fits 1988-1992 GMC K1500, N/A, fits vehicles with air conditioning
• Fits 1988-1992 GMC K2500, N/A, fits vehicles with air conditioning
• Fits 1988-1992 GMC K3500, N/A, fits vehicles with air conditioning
• Fits 1991-1992 Oldsmobile Custom Cruiser, N/A
• Fits 1990-1992 Pontiac Firebird, N/A
• Fits 1987-1991 Chevrolet Blazer, N/A, fits vehicles with air conditioning
• Fits 1987-1991 Chevrolet G10, N/A, fits vehicles with air conditioning
• Fits 1987-1991 Chevrolet G10, N/A, w/ 100 amp, w/ 6S pulley
• Fits 1987-1991 Chevrolet G20, N/A, fits vehicles with air conditioning
• Fits 1987-1991 Chevrolet G20, N/A, w/ 100 amp, w/ 6S pulley
• Fits 1989-1991 Chevrolet G30, N/A, fits vehicles with air conditioning
• Fits 1987-1991 Chevrolet G30, N/A, w/ 100 amp, w/ 6S pulley
• Fits 1987-1991 GMC G1500, N/A, fits vehicles with air conditioning
• Fits 1987-1991 GMC G1500, N/A, w/ AC, w/ 6S Pulley
• Fits 1987-1991 GMC G2500, N/A, fits vehicles with air conditioning
• Fits 1987-1991 GMC G2500, N/A, w/ AC, w/ 6S Pulley
• Fits 1987-1991 GMC G3500, N/A, fits vehicles with air conditioning
• Fits 1987-1991 GMC G3500, N/A, w/ AC, w/ 6S Pulley
• Fits 1990 GMC G3500, N/A, optional fitment with a 100 amp alternator
• Fits 1987-1989 Chevrolet Astro, N/A, fits vehicles with air conditioning
• Fits 1987-1989 GMC Safari, N/A, fits vehicles with air conditioning
• Fits 1987-1988 Chevrolet G30, N/A, w/ AC, w/ 100 amp alt., 6S pulley
• Fits 1987 Chevrolet Blazer, N/A, w/ 100 amp alt., w/ 6S pulley
• Fits 1987 Chevrolet G10, N/A, w/ AC, w/ 6S Pulley
• Fits 1987 Chevrolet G20, N/A, w/ AC, w/ 6S Pulley

Common Replacement Uses

• Restores charging output on a vehicle with a weak or failing alternator
• Addresses battery drain caused by insufficient alternator amperage
• Helps correct charging-system warning lights or low-voltage conditions
• Replaces a worn Delco-style alternator with the correct pulley and rotation setup
• Supports air-conditioned GM truck, van, and passenger-car charging systems

Installation Notes and Tips

Verify the 100 amp rating, 12-volt system, 11:00 clock position, clockwise rotation, and 6-groove serpentine pulley before installation. Confirm the vehicle uses an internal regulator and matches the listed Delco-style configuration, especially on Chevrolet C1500, GMC K1500, and Chevrolet Camaro applications. Compare the existing alternator to part number 7991611N and check the fitment notes for air conditioning or 100 amp-specific requirements.

Quality Assurance

MPA Electrical supplies this new alternator as a specification-based replacement built to match the listed charging-system requirements for the covered GM applications.