MPA Electrical 6339MSN Starter Motor

Starter for GM 3.1L and 3.8L Applications

The MPA Electrical 6339MSN is a new 12-volt starter built with a direct drive design and a 1.5 kW rating. It is configured for clockwise rotation and uses a 9-tooth drive, making it a fitment-focused replacement for a wide range of Buick, Chevrolet, Oldsmobile, and Pontiac vehicles.

Use this starter when you need a direct-drive replacement for GM passenger cars and vans from the 1983-1996 model years. The 6339MSN is listed for applications such as Buick Park Avenue, Buick LeSabre, Chevrolet Astro, Oldsmobile 88, and Pontiac Bonneville, with additional coverage across many related GM platforms.

Key Features

• MPA Electrical new starter, part number 6339MSN
• Direct drive design for listed GM applications
• 1.5 kW starter motor rating
• 12-volt electrical system
• Clockwise rotation
• 9-tooth drive configuration
• Delco manufacturer specification

Fitment Coverage

• Fits 1992-1996 Buick Park Avenue, N/A
• Fits 1986-1995 Buick LeSabre, N/A
• Fits 1990-1995 Buick Regal, N/A
• Fits 1992-1995 Chevrolet Lumina APV, N/A
• Fits 1992-1995 Oldsmobile 88, N/A
• Fits 1992-1995 Oldsmobile 98, N/A
• Fits 1985-1990 Oldsmobile 98, N/A
• Fits 1992-1995 Oldsmobile Silhouette, N/A
• Fits 1987-1995 Pontiac Bonneville, N/A
• Fits 1992-1995 Pontiac Trans Sport, N/A
• Fits 1983-1993 Buick Century, N/A
• Fits 1991-1993 Buick Riviera, N/A
• Fits 1985-1993 Buick Skylark, N/A
• Fits 1992-1993 Oldsmobile Achieva, N/A
• Fits 1983-1993 Oldsmobile Cutlass Ciera, N/A
• Fits 1987-1993 Oldsmobile Cutlass Cruiser, N/A
• Fits 1992-1993 Pontiac Grand Am, N/A
• Fits 1985-1987 Pontiac Grand Am, N/A
• Fits 1991-1992 Oldsmobile Toronado, N/A
• Fits 1985-1990 Chevrolet Astro, N/A
• Fits 1985-1990 Chevrolet Celebrity, N/A
• Fits 1990 Chevrolet Lumina, N/A
• Fits 1985-1990 GMC Safari, N/A
• Fits 1984-1986 Chevrolet Camaro, N/A
• Fits 1984-1986 Pontiac Firebird, N/A
• Fits 1985 Chevrolet Citation II, N/A
• Fits 1985-1987 Oldsmobile Calais, N/A
• Fits 1986-1991 Oldsmobile Delta 88, N/A
• Fits 1985-1991 Pontiac 6000, N/A
• Fits 1984-1986 Buick Century, N/A
• Fits 1984-1986 Buick Skylark, N/A
• Fits 1984-1986 Chevrolet Celebrity, N/A
• Fits 1984-1986 Chevrolet Citation II, N/A
• Fits 1984-1986 Oldsmobile Cutlass Ciera, N/A
• Fits 1984-1986 Oldsmobile Omega, N/A
• Fits 1984-1986 Pontiac 6000, N/A
• Fits 1984-1986 Pontiac Phoenix, N/A

Common Replacement Uses

• Restores engine cranking when the original starter no longer engages
• Addresses slow or inconsistent starting on 12-volt GM vehicles
• Replaces worn direct-drive starter units with the correct rotation and tooth count
• Solves no-crank conditions caused by starter motor wear or internal electrical failure
• Supports repair of intermittent starting on Buick, Chevrolet, Oldsmobile, and Pontiac models

Installation Notes

Verify the starter type, rotation, tooth count, and electrical specification before installation. This part cross-references AMS Automotive 6339 for the same application. Confirm the vehicle’s original starter configuration, especially on 1984 models with cast-ear solenoid notes and other direct-drive-specific applications.

For fitment searches, this starter is commonly referenced for 1992-1996 Buick Park Avenue, 1986-1995 Buick LeSabre, and 1987-1995 Pontiac Bonneville applications. The MPA Electrical 6339MSN should be matched to the vehicle’s original Delco-style direct-drive setup.

Quality Assurance

MPA Electrical supplies this starter as a new replacement unit built to the listed Delco specification and application data. Part number 6339MSN is cataloged for direct-drive GM starting systems across the confirmed fitment range.