Hey Brian==it is in the fromt of the intake manifold. Drain the rakiator then remove it and install the new one. GoodluckJoe
That would acually be the fan sensor. There is a coolant temperature sensor on the right hand end (looking from the front) of the engine. When it fails, the idle speed goes a bit goofy and the engine tends to ide fast. The gauge will also do some interesting things as well.
This is best done with a cold engine but can be done hot, just be very very careful and make sure the pressure is off the cooling system but once you have released it, put the cap back on tight.
The sensor has 2 wires, yellow and black, and is clipped onto the sensor with a snap connector. Be careful not to pull the wires but to pull the sensor off with the plastic holder. Once the wires are free, then you can remove the old sensor.
Make sure to prepare the new one by wrapping Teflon tape on the threads to seal it. That works best. Remove the old sensor and quickly put the new one into place and finger tighten. Once it snuggs up, then finish tightening it into place.
Make sure you replace the wires otherwise it will at least set an error code or 2.
Good luck.
Refer to the link below
Replace your Engine Coolant Temperature Sensor. Visit Saturnfans.com for help in diagnosis
The coolant temperature sensor can be found on the front of the engine, near the thermostat. Remove the coolant temperature sensor retaining nut, to replace it.
The sensor is threaded into the coolant passage in the back of the cylinder head.
Replace the engine coolant temperature sensor. Your car has two, replace the one with the 2 wire connector
Engine coolant temperature switch/sensor
Replace your Engine Coolant Temperature Sensor. Your car has two, replace the one with the two wire connector
Faulty coolant temp sensor can cause the vehicle to run poorly, if run at all. If you are leaning toward replacing the sensor you will be happy to know the sensor is relatively cheap, around $12, and simple to replace. Please visit my Bio for a link to my saturn help site for image of where the coolant temperature sensor is located.
Engine Coolant Temperature Sensor.
on the right side of the engine
under the backseat and you just pull it out and put a new one right back in
Start by replacing the Engine Coolant Temperature Sensor