Standard Ignition S20504 Fuel Injection Throttle Body

Electronic Throttle Body for GM HD Trucks

Standard Ignition S20504 is an electronic fuel injection throttle body assembly for select Chevrolet Silverado 2500 HD and 3500 HD, plus GMC Sierra 2500 HD and 3500 HD models. It includes the electronic throttle body gasket and throttle position sensor, with factory relearn required after installation.

Key Features

• Electronic throttle body assembly for fuel injection systems
• Includes throttle position sensor
• Electronic throttle body gasket included
• Mounting hardware included
• Female connector with 1 connector, 6 male blade terminals
• No fuel injectors, idle air control motor, or throttle body spacer included

Detailed Description

Built for direct replacement service on GM heavy-duty trucks, the Standard Ignition S20504 throttle body restores electronic airflow control at the intake. It is listed for 2021-2025 Chevrolet Silverado 2500 HD and Silverado 3500 HD, as well as 2021-2025 GMC Sierra 2500 HD and Sierra 3500 HD applications. This part cross-references OE-style numbers such as 12697037 and ETB834 for the same application.

Standard Ignition S20504 is a practical choice when the original throttle body shows wear, electronic faults, or drivability concerns tied to throttle response. The assembly is supplied with the throttle position sensor already included, which supports a cleaner replacement process on the listed Chevrolet Silverado HD and GMC Sierra HD trucks.

Common Issues This Part Can Address

• Rough or unstable idle related to throttle body wear
• Delayed throttle response or inconsistent acceleration
• Electronic throttle body fault codes
• Reduced engine performance caused by airflow control problems
• Driveability issues after throttle body contamination or sensor failure

Installation Notes and Tips

Fits 2021-2025 Chevrolet Silverado 2500 HD, N/A. Fits 2021-2025 Chevrolet Silverado 3500 HD, N/A. Fits 2021-2025 GMC Sierra 2500 HD, N/A. Fits 2021-2025 GMC Sierra 3500 HD, N/A. Factory relearn procedure required after installation. Verify connector style, terminal count, and gasket condition before installation. Clean the intake mating surface and follow the vehicle-specific relearn steps to complete setup correctly.

Quality Assurance

Standard Ignition S20504 is built as a replacement electronic throttle body for the listed GM HD truck applications and is supplied with the components identified in the product data for service-ready installation.