Dorman 977-374 Fuel Injection Throttle Body

Dorman 977-374 Electronic Throttle Body

Dorman 977-374 is an electronic fuel injection throttle body built for direct replacement on select GM vehicles. It uses aluminum housing, a 72 mm bore, and an included throttle position sensor to restore throttle response on applications such as the Chevrolet Silverado 1500, GMC Sierra 1500, and Cadillac XT5.

Key Features

• OE FIX throttle body with Dorman Sensor Shield technology to help reduce future contamination-related failures
• Proprietary butterfly shaft seal helps block moisture and oil intrusion into internal electronics
• Electronic throttle body design with 6-terminal male electrical connection
• 72 mm inlet and outlet diameter for the listed GM applications
• Aluminum housing with natural finish
• Throttle position sensor included
• Gasket included for installation
• Standard replacement grade for gas fuel systems

Detailed Description

This Dorman throttle body is engineered as a replacement for original equipment units that can fail when moisture and oil contaminate the internal electronics. Part number 977-374 uses Sensor Shield technology and a sealed butterfly shaft design to address that common failure point while maintaining the electronic throttle control required by modern GM engines. It is a direct-fit style replacement for vehicles including the Chevrolet Silverado 1500, GMC Sierra 1500, and Cadillac XT5, along with other listed Cadillac, Chevrolet, and GMC models.

This part cross-references Standard Ignition S20222 for the same application.

What It Helps Fix

• Throttle response problems caused by a failing electronic throttle body
• Check engine lights related to throttle body performance or sensor faults
• Idle quality issues tied to contaminated throttle electronics
• Reduced acceleration caused by throttle plate or sensor malfunction
• Driveability concerns on gas-powered GM trucks and SUVs

Installation Notes and Tips

• Verify the 72 mm inlet and outlet dimensions before installation.
• Confirm the 6-terminal male connector matches the original unit.
• Use the included gasket during installation.
• Inspect the intake tract for oil or moisture contamination before fitting the new throttle body.
• Follow the vehicle-specific relearn or calibration procedure after installation if required by the application.

Quality Assurance

Dorman OE FIX components are built to address known failure points in original equipment parts. This throttle body combines a standard replacement form factor with a contamination-resistant shaft seal and integrated throttle position sensor for the listed applications.

Compatible Vehicles

• Fits 2019-2021 Cadillac XT5, N/A
• Fits 2020-2021 Cadillac XT6, N/A
• Fits 2019-2021 Chevrolet Blazer, N/A
• Fits 2020-2021 Chevrolet Camaro, N/A
• Fits 2019-2021 Chevrolet Colorado, N/A
• Fits 2018-2021 Chevrolet Express 2500, N/A
• Fits 2018-2021 Chevrolet Express 3500, N/A
• Fits 2014-2021 Chevrolet Silverado 1500, N/A
• Fits 2019-2021 GMC Acadia, N/A
• Fits 2019-2021 GMC Canyon, N/A
• Fits 2018-2021 GMC Savana 2500, N/A
• Fits 2018-2021 GMC Savana 3500, N/A
• Fits 2014-2021 GMC Sierra 1500, N/A
• Fits 2018-2020 Cadillac CT6, N/A