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The speed sensor for a 2004 Chevy Silverado can be found on the right side towards the back of the transmission. This sensor, also known as the vehicle speed sensor (VSS), plays a crucial role in calculating the transmission's gear ratio to monitor the vehicle's speed and facilitate smooth shifting. Signs of a faulty VSS include rough or incorrect gear changes. If the sensors fail to provide accurate speed data, the powertrain control module (PCM) won't be able to effectively manage gear shifts. As a result, your cruise control might malfunction, and the check engine light could illuminate.
I have a 2004 Silverado 5.3 extended cab, and the transmission is located on the passenger side at the back. I hope this information is useful to you.
In a 2004 Chevy Silverado, you can find the speed sensor situated on the wheel hub assembly.