Dorman 977-823 Fuel Injection Throttle Body

OE-Style Throttle Body Replacement

Dorman 977-823 is a standard replacement fuel injection throttle body for select Chevrolet and GMC vans. It is built as a 100% new unit to match original equipment fit and function, with an aluminum housing, integrated idle air control motor, and throttle position sensor.

For vehicles with rough idle, a malfunction indicator lamp, or diagnostic trouble codes tied to throttle body contamination, this replacement helps restore proper throttle response on Chevrolet Express 1500, Express 2500, Express 3500, GMC Savana 1500, Savana 2500, and Savana 3500 applications.

• Standard replacement throttle body for gas fuel systems
• 100 mm inlet and 100 mm bore diameter
• Flanged inlet with non-flanged outlet
• Aluminum construction with natural finish
• Integrated idle air control motor and throttle position sensor
• Male electrical connection with blade terminals
• Gasket included
• Fits select 2003-2006 Chevrolet and GMC vans

Detailed Product Overview

Dorman 977-823 is engineered for direct replacement on specified Chevrolet Express and GMC Savana models. The mechanical throttle body design is intended to match the original unit’s fit and function, making it a practical solution when the factory throttle body is affected by oil ingress, dirt, or carbon buildup. This part cross-references Standard Ignition S20024 for the same application.

Common Problems This Part Can Address

• Rough or unstable idle
• Malfunction indicator lamp illumination
• Throttle body contamination from dirt or carbon buildup
• Diagnostic trouble codes related to throttle control
• Poor throttle response on affected Chevrolet Express and GMC Savana vehicles

Installation Notes and Tips

Verify vehicle year, make, model, and engine application before installation. Clean the intake mating surface thoroughly and replace the gasket supplied with the unit. Confirm the electrical connector style, terminal count, and throttle body orientation match the original part before final assembly. After installation, clear any stored codes and perform the required idle relearn or throttle adaptation procedure if specified by the vehicle service information.

Quality Assurance

Dorman manufactures this throttle body as a new replacement component designed to match OE fit and function for the listed Chevrolet and GMC applications. Part number 977-823 is built with aluminum construction and includes the sensor and idle air control components needed for the specified vehicles.

Vehicle Fitment

• Fits 2003-2006 Chevrolet Express 1500, N/A
• Fits 2003-2006 Chevrolet Express 2500, N/A
• Fits 2003-2006 Chevrolet Express 3500, N/A
• Fits 2003-2006 GMC Savana 1500, N/A
• Fits 2003-2006 GMC Savana 2500, N/A
• Fits 2003-2006 GMC Savana 3500, N/A