thermostat gasket probably leaking. replace thermostat and gasket making sure that thermostat housing is flat.
V6 or V8?
Remove the water supply hose from the top of your 2003 Chevy Monte Carlo thermostat housing. Remove the thermostat housing retaining bolts. Lift the old thermostat out. Drop the new thermostat in and reverse the process.
You don't. You replace a thermostat that has failed. They are meant to be replaced.
Joey AF R.
about $10.
Under the thermostat
The thermostat on a 1999 Chevy Monte Carlo with a 3.1 is located just below the throttle body. It is covered by the top radiator hose attached at that location.
behind the airbag.
it is below the throttle body follow hose
take it to a mechanic and get it repaired.
no, the thermostat would have nothing to do with the car not starting.
Drain the water from your 1997 Chevy Monte Carlo cooling system. Remove the water supply hose. Remove the thermostat housing retaining bolts. The thermostat will lift out. Reverse the process to install the new thermostat.