🌡️ Engine Coolant Temperature Sensor - ACDelco GM Original Equipment (Part #12551708) Review

Suitable for exchange of LS. The only problem is that it reads 4-5 degrees higher than the original temperature reading in 5.3. But it's not really a problem.

I've been looking for this sensor at my local parts store and they kept getting wrong but this one was perfect for my 243 head replacement.

If you are replacing your squarebody motor with an LQ4 this is a very good choice. It can send temperature readings to the engine ECM as well as the temperature sensor in your squarebody.

Used to use the third wire for my c10 sensor cluster with ls replacement. Worked fine but the sensor is not 100% accurate due to the resistance difference with the c10 sensor. The readings are slightly lower than actual.

This transmitter unit does what it was designed to do. My application is a replacement 1986 Chevy K10. It tells the computer what it needs to know and has a wire that works with my factory temp sensor. It reads coldly, but that's not the fault of the details. It was designed for later vehicle models that use a different drag range than older GM vehicles. I'm happy to have a good indicator of what my engine is doing.