Dorman 977-859 Fuel Injection Throttle Body

Dorman 977-859 Electronic Throttle Body

Dorman 977-859 is an electronic fuel injection throttle body for gas applications that addresses a common OE failure point caused by moisture and oil intrusion. It includes throttle position sensor integration and Dorman Sensor Shield technology to help protect the internal electronics and butterfly shaft seal from repeat contamination.

Key Features

• Electronic throttle body for fuel injection systems
• Aluminum throttle body construction with natural finish
• Flanged inlet design with 89.44 mm inlet diameter
• 75.02 mm bore diameter and 75.02 mm outlet diameter
• Throttle position sensor included
• 8-terminal blade-style electrical connection
• Dorman Sensor Shield technology helps protect against moisture and oil intrusion
• Direct replacement for select GM truck and SUV applications

Detailed Description

This Dorman OE FIX throttle body is built for select 2000-2002 Chevrolet Silverado 1500, Silverado 2500, Silverado 3500, Tahoe, Suburban, Avalanche 1500, and 2000-2002 GMC Sierra, Yukon, and Yukon XL applications, plus 2002 Cadillac Escalade and Escalade EXT models. Part number 977-859 is engineered as an electronic replacement for the original throttle body on these vehicles, with a design focused on the contamination-related failures that often affect OE units.

The aluminum housing and integrated throttle position sensor support accurate throttle control in gas-powered applications. If you are searching for a 2000-2002 Chevrolet Silverado 1500 electronic throttle body, a 2000-2002 GMC Sierra 2500 throttle body, or a 2002 Cadillac Escalade throttle body replacement, this part number provides a direct-fit service solution for the listed vehicles.

This part cross-references Cardone Reman 67-3010 for the same application.

What It Helps Address

• Throttle response issues caused by a failing electronic throttle body
• Check engine lights related to throttle body or throttle position sensor faults
• Idle instability tied to internal contamination of the throttle assembly
• Driveability problems from moisture or oil intrusion into throttle electronics
• Replacement needs on high-mileage GM truck and SUV throttle systems

Installation Notes and Tips

Verify connector style, bore size, and vehicle application before installation. This throttle body does not include mounting hardware, gasket or seal, or installation hardware, so reuse or source the required service parts as needed. After installation, follow the vehicle manufacturer’s relearn or calibration procedure for electronic throttle systems.

Quality Assurance

Dorman OE FIX components are built to address known failure points in original equipment designs. Part number 977-859 uses Sensor Shield technology and a proprietary butterfly shaft seal to help reduce repeat contamination-related failures in the throttle body assembly.

• Fits 2000-2002 Chevrolet Silverado 1500, N/A
• Fits 2001-2002 Chevrolet Silverado 1500 HD, N/A
• Fits 2000-2002 Chevrolet Silverado 2500, N/A
• Fits 2001-2002 Chevrolet Silverado 2500 HD, N/A
• Fits 2001-2002 Chevrolet Silverado 3500, N/A
• Fits 2000-2002 Chevrolet Suburban 1500, N/A
• Fits 2000-2002 Chevrolet Suburban 2500, N/A
• Fits 2000-2002 Chevrolet Tahoe, N/A
• Fits 2002 Chevrolet Avalanche 1500, N/A
• Fits 2002 Cadillac Escalade, N/A
• Fits 2002 Cadillac Escalade EXT, N/A
• Fits 2000-2002 GMC Sierra 1500, N/A
• Fits 2001-2002 GMC Sierra 1500 HD, N/A
• Fits 2000-2002 GMC Sierra 2500, N/A
• Fits 2001-2002 GMC Sierra 2500 HD, N/A
• Fits 2001-2002 GMC Sierra 3500, N/A
• Fits 2000-2002 GMC Yukon, N/A
• Fits 2000-2002 GMC Yukon XL 1500, N/A
• Fits 2000-2002 GMC Yukon XL 2500, N/A