The Schley Duramax Turbo Vane Position Sensor Socket, No. 12400, has been designed to remove the turbo vane position sensor on late 2004 to present GM medium duty trucks with Duramax engines. The tool also works on light duty trucks and Isuzu diesel F series medium duty trucks. The sensor is located on the turbo between the hot and cold sides it has an integrated wire and connector making this sensor is easily damaged by an open end wrench and not accessible with a box end wrench, or socket, line wrenches are too bulky for the tight space. This socket is designed to accommodate the wire and the tight space where it is located. With the 12400 the sensor can be removed safely so that it can be reused if necessary. This tool makes removal and installation easy on medium duty trucks with difficult-to-reach sensors.