Dorman 977-375 Fuel Injection Throttle Body

Dorman OE FIX Throttle Body

Dorman 977-375 is an electronic fuel injection throttle body for gas applications, built for direct replacement on select Chevrolet and GMC trucks and SUVs. It addresses a common OE failure point by adding Sensor Shield technology and a proprietary butterfly shaft seal to help keep moisture and oil intrusion away from the internal electronics.

Compatible With Chevrolet Silverado 1500, Tahoe, Cheyenne, Silverado 1500 LD, Silverado 1500 LTD, Silverado 1500 Nueva, Cheyenne Nueva, and GMC Sierra, Sierra 1500, Sierra 1500 Limited, Sierra Nueva, Yukon, and Yukon XL applications across the listed model years.

• Electronic throttle body design with integrated throttle position sensor
• Aluminum housing with natural finish
• Non-flanged inlet and outlet design
• Blade-style connector with 6 terminals
• Gasket included for installation
• Built with Dorman Sensor Shield technology to help reduce contamination-related failures

Detailed Product Overview

This Dorman throttle body is engineered as an OE-style replacement for vehicles that use electronic throttle control. Part number 977-375 is designed around the original throttle body layout and includes the throttle position sensor, helping restore proper airflow control and throttle response when the factory unit is worn or contaminated. The aluminum construction and sealed shaft design support reliable operation in demanding underhood conditions.

This part cross-references Hitachi Automotive ETB0066 for the same application. It also cross-references Standard Ignition S20223 for the same application.

Common Problems It Can Address

• Throttle response issues caused by internal contamination
• Rough idle related to throttle body wear or electronic faults
• Reduced acceleration from a sticking throttle plate
• Check engine light conditions tied to throttle position sensor performance
• Airflow control problems on electronic throttle systems

Installation Notes and Tips

Verify the inlet and outlet dimensions, connector style, and electronic throttle body type before installation. The gasket is included, but mounting hardware is not. After installation, follow the vehicle-specific relearn or idle relearn procedure if required by the application.

Fits 2014-2023 Chevrolet Silverado 1500, N/A; fits 2015-2023 Chevrolet Tahoe, N/A; fits 2014-2023 GMC Sierra 1500, N/A; fits 2015-2023 GMC Yukon, N/A. Additional listed coverage includes Chevrolet Cheyenne, GMC Sierra, GMC Yukon XL, Silverado 1500 LD, Silverado 1500 LTD, and Sierra 1500 Limited applications.

Quality Assurance

Dorman OE FIX parts are developed to address known failure points in original equipment components. Part number 977-375 uses a contamination-resistant shaft seal and Sensor Shield technology to improve durability in the throttle body’s electronic control area.