Dorman 904-824 Vacuum Pump

Reliable Vacuum Pump for Chevrolet and GMC Vans

The Dorman 904-824 vacuum pump is designed specifically for emission control systems in Chevrolet Express 2500, Express 3500, GMC Savana 2500, and Savana 3500 models. This electric motor-driven vacuum pump ensures consistent performance without the need for a pulley, making it a precise replacement part for your vehicle's vacuum system.

• Electric motor drive system for efficient vacuum generation
• Plastic housing material for lightweight durability
• Includes a relief valve to protect the system
• Two male pin terminals with elliptical connector shape
• Barbed vacuum pump connector with 0.163 inch port diameter
• Compatible with Chevrolet Express 2500/3500 and GMC Savana 2500/3500
• Part number 904-824 for accurate identification

Technical Details and Features

The Dorman 904-824 vacuum pump features a plastic housing that balances durability and weight, suitable for the demanding environment of emission control systems. It operates via an electric motor drive system, eliminating the need for a pulley, which simplifies installation and reduces mechanical wear. The pump includes a relief valve to maintain system safety and prevent overpressure. It has two male pin terminals with an elliptical connector shape, ensuring secure electrical connections. The vacuum port is barbed with a diameter of 0.163 inches, designed to fit standard vacuum hoses with a 3/16 inch inlet and 1/4 inch outlet, providing compatibility with the original equipment specifications.

Applications and Problem Resolution

This vacuum pump is compatible with specific Chevrolet and GMC full-size vans, including the Express 2500, Express 3500, Savana 2500, and Savana 3500. It is intended for use in emission control vacuum systems and can address several common issues:

• Loss of vacuum pressure affecting brake booster performance
• Faulty or worn vacuum pump causing engine performance issues
• Emission control system malfunctions related to vacuum supply
• Electrical connector failures due to damaged terminals
• Vacuum leaks from worn or damaged pump components

Installation Notes and Tips

When installing the Dorman 904-824 vacuum pump, ensure the electrical connections match the two-pin male elliptical terminals for proper fit. Since mounting hardware, gaskets, and pulleys are not included, reuse existing components or source compatible parts separately. Verify vacuum hose sizes to match the 0.163 inch barbed port and confirm secure hose attachment to prevent leaks. Follow vehicle-specific service manuals for torque specifications and electrical wiring procedures to ensure safe and effective installation.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 904-824 vacuum pump undergoes quality checks to ensure reliable operation within emission control systems. While specific warranty details are not provided here, Dorman typically offers limited warranties covering defects in materials and workmanship. Consult product documentation or the manufacturer for exact warranty terms.