MPA Electrical 6485MSN Starter Motor

Starter for GM 4.3L Applications

MPA Electrical 6485MSN is a new 12-volt starter built with a permanent magnet gear reduction design and a 1.5 kW rating. It uses a clockwise rotation and an 11-tooth drive for the listed Chevrolet, GMC, Oldsmobile, and Isuzu applications.

Built for direct replacement service, this starter is listed for multiple 1999-2005 GM truck and van platforms, including Chevrolet Express 1500, Silverado 1500, S10, and GMC Safari, Sierra 1500, and Sonoma applications. Part number 6485MSN is also cross-referenced to AMS Automotive 6485 for the same application.

Key Features

• Permanent magnet gear reduction starter design
• 1.5 kW output rating
• 12-volt electrical system
• Clockwise rotation
• 11-tooth drive
• Delco manufacturer specification
• New MPA Electrical replacement part

Detailed Description

MPA Electrical 6485MSN is a starter motor for GM vehicles that require a Delco-style, permanent magnet gear reduction unit with an 11-tooth drive. The design supports the listed Chevrolet Express 1500, Chevrolet Silverado 1500, GMC Safari, GMC Sierra 1500, and related applications across 1999-2005 model years. If you are replacing a worn starter on a Chevrolet S10 or GMC Sonoma, this part number 6485MSN matches the specified electrical and drive configuration for those vehicles.

This starter is also listed for 2004 first-production applications and select optional PMGR starter applications on 1999-2000 Chevrolet Express and GMC Savana models. Use the vehicle fitment details below to confirm year, model, and configuration before ordering.

Vehicle Fitment

• Fits 2000-2005 Chevrolet Express 1500, N/A
• Fits 2004 Chevrolet Astro, N/A; First Production, 11 tooth drive; New
• Fits 2004 Chevrolet Blazer, N/A; First Production, 11 tooth drive; New
• Fits 2004 Chevrolet Express 1500, N/A; First Production, 11 tooth drive; New
• Fits 2004 Chevrolet Express 2500, N/A; First Production, 11 tooth drive; New
• Fits 2004 Chevrolet S10, N/A; First Production, 11 tooth drive; New
• Fits 2004 Chevrolet Silverado 1500, N/A; First Production, 11 tooth drive; New
• Fits 2004 GMC Jimmy, N/A; First Production, 11 tooth drive; New
• Fits 2004 GMC Safari, N/A; First Production; New
• Fits 2004 GMC Savana 1500, N/A; First Production; New
• Fits 2004 GMC Savana 2500, N/A; First Production; New
• Fits 2004 GMC Sierra 1500, N/A; First Production; New
• Fits 2004 GMC Sonoma, N/A; First Production; New
• Fits 1999-2003 Chevrolet Astro, N/A
• Fits 1999-2003 Chevrolet Blazer, N/A
• Fits 2001-2003 Chevrolet Express 2500, N/A
• Fits 1999-2003 Chevrolet S10, N/A
• Fits 1999-2003 Chevrolet Silverado 1500, N/A
• Fits 1999-2003 GMC Jimmy, N/A
• Fits 1999-2003 GMC Safari, N/A
• Fits 2001-2003 GMC Savana 1500, N/A
• Fits 2001-2003 GMC Savana 2500, N/A
• Fits 1999-2003 GMC Sierra 1500, N/A
• Fits 1999-2003 GMC Sonoma, N/A
• Fits 1999-2002 Chevrolet C1500, N/A
• Fits 2001-2002 Chevrolet G30, N/A
• Fits 2000-2002 GMC Savana 3500, N/A
• Fits 1999-2001 Oldsmobile Bravada, N/A
• Fits 1999-2000 Chevrolet Express 1500, N/A; Optional, w/ PMGR Starter; New
• Fits 1999-2000 Chevrolet Express 2500, N/A; Optional, w/ PMGR Starter; New
• Fits 1999-2000 GMC Savana 1500, N/A; Optional, w/ PMGR Starter; New
• Fits 1999-2000 GMC Savana 2500, N/A; Optional, w/ PMGR Starter; New
• Fits 1999-2000 Isuzu Hombre, N/A

Common Replacement Uses

• Engine cranks slowly or intermittently
• Starter clicks but does not engage
• No-crank condition with a charged battery
• Replacement for a worn Delco-style PMGR starter
• Restoring starting performance on GM trucks and vans

Installation Notes and Tips

Confirm the starter drive tooth count, rotation, voltage, and PMGR configuration before installation. Verify the vehicle’s production date and engine-specific starter requirements, especially on 2004 first-production and 1999-2000 optional PMGR applications. Compare the removed unit to part number 6485MSN and check the mounting and electrical connections against the original starter.

Quality Assurance

MPA Electrical supplies new replacement electrical components for starter and charging system service. This part is built to the listed Delco specification and application data for the confirmed vehicle fitments.