Dorman 977-313 Fuel Injection Throttle Body

Overview of the Dorman 977-313 Electronic Throttle Body

The Dorman 977-313 electronic throttle body is designed to provide precise throttle control for select Chevrolet, GMC, Pontiac, and Saturn vehicles. Engineered with an aluminum housing and integrated throttle position sensor, this component supports efficient fuel delivery and engine performance.

• Compatible with Chevrolet Malibu, Silverado 1500, Express 1500, GMC Sierra 1500, Pontiac G6, G8, Saturn Aura, and Savana 1500
• Electronic throttle body with integrated throttle position sensor and idle air control motor
• Aluminum housing for durability and heat resistance
• Flanged inlet and outlet with diameters of 73.5 mm and 71.5 mm respectively
• Single inlet and outlet design with a 78 mm bore diameter
• Pin-type electrical connector with 6 terminals for reliable connection

Detailed Product Description

The Dorman 977-313 throttle body is an electronic type designed for gas fuel systems, featuring a natural finish aluminum housing that ensures long-lasting performance under engine bay conditions. It includes an integrated throttle position sensor and idle air control motor, which are essential for maintaining proper air-fuel mixture and idle speed control. The throttle body has a single flanged inlet and outlet, measuring 73.5 mm and 71.5 mm in diameter, respectively, with a bore diameter of 78 mm to optimize airflow. The electrical connection uses a 6-terminal pin connector, providing secure and consistent communication with the vehicle's engine control unit.

Common Applications and Problem Resolution

• Restores proper throttle response and engine acceleration in Chevrolet Malibu and GMC Sierra 1500
• Resolves idle speed fluctuations and stalling issues in Pontiac G6 and Saturn Aura
• Addresses electronic throttle control warning lights and sensor faults in Chevrolet Express 1500 and Savana 1500
• Improves fuel efficiency and drivability in GMC Sierra 1500 and Pontiac G8
• Replaces worn or damaged throttle bodies to maintain engine performance in Silverado 1500

Installation Notes and Tips

Installation of the Dorman 977-313 throttle body requires careful handling of the electronic connectors and throttle position sensor. Ensure the mating surfaces are clean and free of debris before mounting. Since no gasket or seal is included, use the original or a compatible replacement gasket to prevent air leaks. Verify all electrical connections are secure and free of corrosion. Calibration or relearning procedures may be necessary after installation to ensure proper throttle response.

Quality Assurance and Warranty

Dorman manufactures this throttle body to meet or exceed OEM specifications, using durable aluminum housing and integrated sensors for reliable operation. While specific warranty details are not provided here, Dorman products typically come with a limited warranty covering defects in materials and workmanship. Consult the product packaging or Dorman's official resources for exact warranty terms.