Remy 25903 Starter Motor

Remy 25903 Premium Remanufactured Starter

Remy 25903 is a premium remanufactured 12-volt starter built with a permanent magnet gear reduction design for dependable engine cranking. It features a clockwise rotation, closed nose housing, 11 pinion teeth, and a 1.7 power rating for applications that require an OE-style replacement starter.

As part of Remy Premium Remanufactured, this starter is built for direct replacement use on select Cadillac, Chevrolet, GMC, Hummer, and Pontiac vehicles. It is a fit for popular truck, SUV, and performance applications, including Chevrolet Silverado 1500, GMC Sierra 2500 HD, Cadillac Escalade, and Hummer H2.

Key Features

• Remy part number 25903
• Premium remanufactured starter for 12-volt systems
• Permanent magnet gear reduction design
• Clockwise rotation
• Closed nose configuration
• 11-tooth pinion
• 1.7 power rating
• OE manufacturer reference: Delco/Delphi
• Pulley included

Detailed Description

Remy 25903 is engineered as a remanufactured starter for vehicles that use a Delco/Delphi-style OE layout. The permanent magnet gear reduction design supports efficient cranking performance, while the closed nose housing and 11-tooth pinion help match the original starter configuration on listed applications. This starter is used across a wide range of GM platforms, including Chevrolet Silverado 2500 HD, GMC Yukon XL 2500, and Cadillac Escalade models, making it a practical OE replacement for common truck and SUV starting systems. If you are searching for a Remy 25903 starter for a 2001-2005 GMC Sierra 1500 or a 2003-2005 Chevrolet Express 3500, this unit matches the listed fitment.

This part cross-references with 10465385 and 12563907 for the same application.

What It Helps Fix

• Slow or weak engine cranking
• No-start conditions caused by starter failure
• Intermittent starter engagement
• Grinding or improper pinion engagement
• Replacement needs on high-mileage GM trucks, SUVs, and performance cars

Installation Notes and Tips

Verify the vehicle’s starter configuration before installation, including rotation direction, nose style, pinion tooth count, and OE-style mounting layout. Some 1999-2001 Camaro, Corvette, and Firebird applications note long mounting bolts, so confirm the existing hardware and starter style before ordering. Always compare the original unit to Remy 25903 and confirm fitment by year, make, model, and engine-specific application details.

Quality Assurance

Remy Premium Remanufactured starters are remanufactured to OE-style specifications for listed applications and built around the original Delco/Delphi design reference. This helps support consistent fit and function on compatible Cadillac Escalade, Chevrolet Silverado, and GMC Sierra applications.