MPA Electrical 6490SN Starter Motor

Starter for GM 4.2L Applications

MPA Electrical 6490SN is a 12-volt starter built with a permanent magnet gear reduction design and a 1.6 kW rating. It is a Delco-style replacement for select Chevrolet Trailblazer, GMC Envoy, and related GM applications, with clockwise rotation and 11 teeth for proper engagement.

Key Features

• Permanent magnet gear reduction starter design
• 1.6 kW output for 12-volt starting systems
• Clockwise rotation
• 11-tooth drive configuration
• Delco manufacturer reference
• MPA Electrical part number 6490SN

Fitment Details

Compatible With 2002-2003 Chevrolet Trailblazer, N/A; 2002-2003 Chevrolet Trailblazer EXT, N/A; 2002-2003 GMC Envoy, N/A; 2002-2003 GMC Envoy XL, N/A; 2003 Isuzu Ascender, N/A; and 2002-2003 Oldsmobile Bravada, N/A. This part cross-references BBB Industries 6490 for the same application.

What This Starter Helps Address

• Slow or weak engine cranking
• No-crank conditions caused by starter failure
• Intermittent starting after key turn
• Grinding or poor starter drive engagement
• Electrical starting issues on 12-volt GM platforms

Installation Notes

Verify clockwise rotation, 11-tooth drive count, 12-volt system voltage, and the 1.6 kW specification before installation. Confirm vehicle application by year, make, and model for Chevrolet Trailblazer, GMC Envoy, Isuzu Ascender, or Oldsmobile Bravada fitment. Inspect battery condition, cables, and charging system performance during replacement to help ensure proper starting system operation.

Quality Assurance

MPA Electrical supplies this starter as a new replacement component for select Delco applications. The design and electrical specifications are listed to support accurate part matching for GM starting system service.