Dorman 904-413 Diesel Glow Plug Controller

Dorman 904-413 Diesel Glow Plug Controller

Restore proper cold-start glow plug operation with this direct replacement diesel glow plug controller from Dorman. Built for specific Chevrolet Silverado 2500 HD, Silverado 3500, GMC Sierra 2500 HD, and Sierra 3500 applications, Dorman 904-413 helps return the glow plug system to normal function when the original controller is no longer operating correctly.

Key Features

• Direct replacement for the original diesel glow plug controller
• Validated for specific vehicle years, make, and models
• Blade terminal design with 4 terminals
• Male connector and male terminal configuration
• Compact housing dimensions: 5.5 in. length, 3.7 in. width, 3.1 in. height
• Package contents: 1 diesel glow plug controller

Detailed Description

Dorman 904-413 is a diesel glow plug controller engineered for 2001-2004 Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500, GMC Sierra 2500 HD, and GMC Sierra 3500 models with Federal Emissions and RPO Code NF2 (Federal Emissions Tier 1). This controller helps manage glow plug operation during cold-weather starts, supporting the electrical control needed for reliable diesel starting performance. It also includes relay functions for the glow plug circuit and intake air heater relay on the listed applications. This part cross-references Standard Ignition RY-585 and 97371491 for the same application.

What It Helps Fix

• Hard starting in cold weather on diesel trucks
• Glow plug system faults caused by a failing controller
• Delayed or inconsistent glow plug activation
• Intake air heater relay control issues on listed applications
• Electrical control problems in the glow plug circuit

Installation Notes and Tips

Verify the vehicle’s year, make, model, Federal Emissions configuration, and RPO Code NF2 before ordering. Confirm connector style, terminal count, and mounting location against the original unit before installation. For best results, inspect the glow plugs, relays, and related wiring for damage or corrosion while replacing the controller. Fits 2001-2004 Chevrolet Silverado 2500 HD, N/A. Fits 2001-2004 Chevrolet Silverado 3500, N/A. Fits 2001-2004 GMC Sierra 2500 HD, N/A. Fits 2001-2004 GMC Sierra 3500, N/A.

Quality Assurance

This Dorman replacement part is validated for the specified vehicle applications to help restore proper glow plug function. It is built as a direct-fit service part for the listed Chevrolet Silverado and GMC Sierra diesel trucks.