Dorman 977-380 Fuel Injection Throttle Body

Electronic Throttle Body Replacement

Dorman 977-380 is an electronic fuel injection throttle body for gas applications, built with an aluminum housing and a 65 mm bore. It is a direct-fit replacement for select Chevrolet, GMC, Buick, and Cadillac models, including Chevrolet Colorado, GMC Canyon, and Chevrolet Impala applications.

This OE FIX design addresses common throttle body failures linked to moisture and oil intrusion, along with internal electronic faults. The unit uses a non-contact Hall effect sensor and a proprietary Sensor Shield butterfly shaft seal to help reduce repeat failure concerns.

Key Features

• Electronic throttle body with a 65 mm inlet and outlet diameter
• Aluminum housing with natural finish
• Non-contact Hall effect sensor for throttle position feedback
• Proprietary butterfly shaft seal helps block moisture and oil intrusion
• Throttle position sensor included
• Gasket included
• 6-terminal blade-style electrical connection
• Direct replacement for select GM vehicles

Detailed Product Information

Dorman 977-380 is engineered for vehicles that use an electronic throttle body in the fuel injection system. The design focuses on the internal failure points commonly seen in original equipment units, while maintaining the correct flange-style inlet, non-flanged outlet, and factory-style electrical interface. This part cross-references Standard Ignition S20220 for the same application.

Compatible With select 2013-2022 Chevrolet, GMC, Buick, and Cadillac applications, including 2015-2022 Chevrolet Colorado, 2015-2022 GMC Canyon, 2017-2021 GMC Acadia, 2019-2022 Chevrolet Blazer, 2017-2020 Buick Envision, 2018-2019 Buick LaCrosse, 2014-2019 Chevrolet Impala, 2013-2017 Cadillac ATS, 2016 Chevrolet Malibu Limited, and 2013-2015 Chevrolet Malibu. Dorman 977-380 is also referenced by OE and aftermarket numbers used in the same application family.

Common Issues This Part May Resolve

• Throttle response problems caused by a failing electronic throttle body
• Idle instability related to throttle position sensor wear
• Driveability issues from moisture or oil intrusion inside the throttle body
• Check engine light conditions tied to throttle body electronic faults
• Airflow control problems affecting acceleration and engine performance

Installation Notes and Tips

Verify the 65 mm bore, 6-terminal connector, and flange-style inlet before installation. Transfer no mounting hardware unless your vehicle-specific service procedure requires it, since installation hardware is not included. A new gasket is included, and the throttle body should be installed on a clean intake surface to help ensure proper sealing and throttle operation.

Quality Assurance

Dorman OE FIX components are built to address known failure points in original equipment parts with updated internal design features. Part number 977-380 is intended as a direct replacement throttle body for the listed GM applications and is backed by Dorman’s product engineering standards.