Dorman 977-806 Fuel Injection Throttle Body

Dorman 977-806 Electronic Throttle Body

Dorman 977-806 is an electronic fuel injection throttle body for select Cadillac applications. It is built with an aluminum housing and a non-contact Hall effect sensor to address common OE throttle body failures tied to moisture, oil intrusion, and internal electronic wear.

Compatible with 2003-2004 Cadillac CTS and 1999-2001 Cadillac Catera, this replacement throttle body is a direct-fit service part for gas fuel systems. The Dorman 977-806 also includes a proprietary Sensor Shield butterfly shaft seal to help reduce future contamination-related issues.

Key Features

• Electronic throttle body for gas fuel injection systems
• Non-contact Hall effect sensor for reduced internal wear
• Proprietary Sensor Shield butterfly shaft seal
• Aluminum housing with natural finish
• Throttle position sensor included
• Flanged inlet design with male electrical connection
• 6-terminal connector configuration

Detailed Description

This Dorman OE FIX throttle body is engineered as a replacement for vehicles that use an electronic throttle control system. The design focuses on the common failure points seen in original throttle bodies, especially contamination from moisture and oil that can affect sensor operation and throttle response. For Cadillac CTS and Cadillac Catera applications, part number 977-806 provides a service solution that matches the original electronic layout while updating the sensing strategy.

This part cross-references Standard Ignition S20010 for the same application. If you are replacing a worn throttle body on a 2003-2004 Cadillac CTS or a 1999-2001 Cadillac Catera, Dorman 977-806 is the relevant service part to verify against your original unit.

Common Problems This Part Can Address

• Rough or unstable idle caused by throttle body wear
• Throttle response issues from contaminated internal electronics
• Check engine light conditions related to throttle position signal faults
• Sticking or inconsistent throttle plate movement
• Driveability complaints tied to moisture or oil intrusion in the throttle body

Installation Notes and Tips

Verify connector style, inlet diameter, and throttle body mounting layout before installation. This unit does not include mounting hardware, gasket or seal, or installation hardware, so reuse or source the required service parts separately as needed. After installation, follow the vehicle manufacturer’s relearn or idle calibration procedure if required by the application.

Quality Assurance

Dorman positions this OE FIX throttle body as an updated replacement for the original design, using a Hall effect sensor and shaft sealing strategy to address known failure modes in the factory unit. Part number 977-806 is built for direct replacement service on the listed Cadillac applications.