On the drivers side cylinder head between #3 & #5 spark plugs.
If the wiring and connections at the coolant temp sending unit check okay start with replacing the coolant temp sending unit. Temp sending unit should be less than $20.
Temperature Gauge Sending Unit The sending unit is located in the front section of the intake manifold in the vicinity of the thermostat.
located coolant temp sensor
Temperature Gauge Sending Unit The sending unit is located in the front section of the manifold in the vicinity of the thermostat.
The temperature sensor (sends coolant temp to the PCM) is located in the top of the thermostat housing. The temperature sender (sends coolant temp to the gauge) is located in the bottom front of the same housing.
Where is the coolant temperature sending unit in a 96 toyota tacoma 3.4L V6
There is usually an ECT (engine coolant temp) sensor and a CTS (coolant temp sensor) located around the thermostat housing mounted in the intake. One sends coolant temp to the guage, the other sends temp to computer.
Usually on the coolant outlet just before the upper radiator hose.
It is next to the thermostat housing.
open the hood and look for it
In answer to your question the coolant temperature sensor on a 2000 Pontiac grand am with a 3.4L engine, is located on the rear of the engine above the flywheel. It is located just behind the what I believe is the alternator.
Called an Engine Coolant Temperature Sensor, Located on drivers side of engine under the EGR with a 2-wire connector. 13mm deep dish socket is needed for removal