Dorman 977-161 Fuel Injection Throttle Body

Overview of Dorman Fuel Injection Throttle Body 977-161

The Dorman 977-161 electronic fuel injection throttle body is designed for precise air and fuel delivery in select GM vehicles. Engineered with durable aluminum and featuring an integrated idle air control motor and throttle position sensor, this throttle body supports reliable engine performance for models like the Chevrolet Silverado 1500 and GMC Sierra 2500.

• Electronic throttle body with integrated idle air control motor
• Constructed from aluminum with a black and natural finish
• Flanged inlet and outlet with 2.95-inch diameter
• Includes throttle position sensor and blade-type electrical connector
• Compatible with gas fuel systems on select Buick, Cadillac, Chevrolet, GMC, and Hummer models

Detailed Product Features and Specifications

The Dorman 977-161 throttle body features a 2.95-inch bore diameter with matching inlet and outlet diameters, both flanged for secure connection. Its aluminum and PBT housing ensures durability and heat resistance. This electronic throttle body includes an 8-terminal blade connector and comes equipped with a throttle position sensor and idle air control motor to maintain optimal engine idle and throttle response. It is designed specifically for gas fuel systems and does not include fuel injectors, gaskets, or mounting hardware.

Compatible Vehicles and Applications

This throttle body is compatible with a range of GM vehicles, including:

• Chevrolet Silverado 1500, 2500, and 3500 (including Classic and HD variants)
• GMC Sierra 1500, 2500, and 3500 (including Classic and HD variants)
• Cadillac Escalade, Escalade ESV, and Escalade EXT
• Buick Rainier and GMC Envoy XL
• Hummer H2
• Chevrolet Avalanche 1500 and Suburban 1500/2500
• Chevrolet Express 1500, 2500, and 3500
• GMC Savana 1500, 2500, and 3500

Common Issues Addressed by This Throttle Body

• Irregular or unstable engine idle speed
• Poor throttle response or hesitation during acceleration
• Check engine light related to throttle position sensor faults
• Reduced engine performance due to faulty idle air control motor
• Airflow inconsistencies causing drivability problems

Installation Notes and Tips

Installation of the Dorman 977-161 throttle body requires removal of the existing throttle body and careful handling of electrical connectors. Since mounting hardware and gaskets are not included, ensure you have the correct parts on hand before beginning installation. Proper torque specifications should be followed to avoid air leaks. It is recommended to perform a throttle body relearn procedure after installation to ensure proper electronic throttle control operation.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 977-161 throttle body undergoes rigorous quality control to ensure durability and reliable performance. Please refer to Dorman's warranty policy for specific coverage details.