midlifetoy1

Does anyone have a picture of the coolant temp sensor on an LS3? I removed the cover and did not readily see it.

4SUMERZ

The Coolant Temp Sensor is located right in front of #1 cylinder exhaust port, which is behind the alternator. Here is a pic of it.

Dale002

I believe once it's unlocked, there is a small tab you push in

08 ATOMIC-Z

Its on the drivers side head. Just disconnect it. Use a deep socket to remove it put your finger in the hole to keep the coolant from running out and replace the sensor. 5 minute job at max and you might loose a 1/2 cup of coolant. The sensor is very cheep and they do go out. It will cause your fan to melt the connector. If you have had this issue you might want to check out the fan connection also. If its melted just cut it and hard wire it.