Engine Coolant Temperature Sensor: Removal
WARNING: This page is about a different car, the 2003 Pontiac Montana, 2003 Oldsmobile Silhouette, and 2003 Chevrolet Venture. However, it is still accessible from the selected car via links, so may be relevant.
Turn ignition off. Drain the cooling system to below the Engine Coolant Temperature (ECT) sensor. See Fig 1. Disconnect the ECT sensor electrical connector. Carefully remove the ECT sensor.