Engine Coolant Temperature Sensor: Removal
WARNING: This page is about a different car, the 2003 Pontiac Bonneville, 2003 Buick Park Avenue, and 2003 Buick LeSabre. However, it is still accessible from the selected car via links, so may be relevant.
Turn OFF the ignition. Partially drain the cooling system to below the Engine Coolant Temperature (ECT) sensor. See Figure. Disconnect the ECT sensor electrical connector. Carefully remove the ECT sensor.