Engine Coolant Temp (ECT) sensor replacement - GM Forum - Buick, Cadillac, Olds, GMC & Pontiac chat

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Old 10-02-2009, 12:26 PM   #1  
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Default Engine Coolant Temp (ECT) sensor replacement

Locate your ECT sensor. It'* located just under the thermostat. Unplug by moving the heat shield out of the way, lift the tab, and wiggle and pull on the plug. Do not pull on the wires.

Now drain come coolant from the system. Remove the old sensor, you will need a 19mm wrench for this. Some coolant might leak out.

Now install the new sensor, put plug back on, and slide heat shield over sensor. Top off cooling system.
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