It is either on the radiator passanger side half way down or in the recovery tank.If it is shot you half to replace it around 50.00 bucks Auto Zone.Mine was not working and I ended up pulling the wires of it but keep an eye on the fluid level.
See a dealer
Under the thermostat
On a 2001 Monte Carlo it is located on the radiator just below the radiator cap.
If coolant full could be a bad sensor
It is located in the transmission
Check coolant level in recovery tank Perhaps a bad sensor. Sensor located in coolant recovery tank
the coolant sensor is in the radiator on the passanger side the oxygen sensor is in the exhaust system on the manifold and the pipes and sometimes both
Where is hood open sensor on 2006 Monte Carlo
no speed sensor is on passenger side on transmission also . I have a hanyes book!
where is the crankshaft position sensor on a 2003 monte carlo
Look where the thermostat is attached to the intake manifold
The low coolant sensor is bad or disconnected.