Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax Starter

Heavy-duty replacement starter designed for select Chevrolet Silverado 2500HD and 3500HD 6.6L Duramax diesel trucks.

This starter uses a gear-reduction design with an integrated solenoid and durable cast-aluminum mounting housing. It is designed to provide strong, reliable cranking for high-compression Duramax diesel engines.

Features

• 12V starter motor

• Gear-reduction design

• Integrated solenoid

• Heavy-duty cast-aluminum housing

• Durable steel motor body

• Factory-style mounting configuration

• High-torque starting performance

• Direct-replacement style design

• Suitable for demanding diesel applications

Fitment

Chevrolet Silverado 2500HD — 6.6L Duramax DieselChevrolet Silverado 3500HD — 6.6L Duramax Diesel

Applicable Duramax generations include various 2001–2019 applications, including LB7, LLY, LBZ, LMM, LML and L5P engines. Exact starter design and part number can vary by model year and engine generation, so the original starter/part number and VIN should be verified before ordering.

For example, GM lists starter 12721722 for numerous Silverado 2500HD/3500HD applications, while GM's 12637617 is listed for 2012–2019 Silverado HD applications. Specifications can differ substantially between these units, so exact fitment verification is important.

Product Specifications

• Voltage: 12V

• Starter Type: Gear reduction

• Solenoid: Integrated

• Rotation: Clockwise

• Drive: Pinion gear

• Mounting: Vehicle-specific flange/pad mounting

• Condition: New

Fitment Disclaimer

Please verify year, engine code, original starter number and VIN before purchasing. The 6.6L Duramax was offered in multiple generations, and starter specifications are not identical across every Silverado HD application.