Description: Manual Valve Position Sensor. Canyon, Colorado. 6 speed. Silverado, Sierra 2500 HD. 6 speed trans. Silverado, Sierra 3500 HD. 6 speed trans. SRX. 4.6l. This part requires programming and/or special setup procedures GM Service Information describes the procedures and special tools needed to ensure proper operation in the vehicle This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors