Behind the lower radiator hose
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.
53 litrer
Probably a 195 (F) degree thermostat. That would be what the system is designed for.
It should have a 195 degree thermostat.
You need only to drain off a couple quarts of coolant to change the thermostat.
Take a look where the lower radiator hose connects to the engine. Where the hose connects, you should find the thermostat.
Trouble code P0128 means:Coolant thermostat (coolant temp below thermostat regulating temp)
In a 2003 Chevy Express van, the thermostat is located in the engine compartment, specifically at the engine's front where the upper radiator hose connects to the engine block. To access it, you'll typically need to remove the upper radiator hose and the thermostat housing. It's important to ensure the engine is cool before attempting to replace or inspect the thermostat.
The thermostat is stuck open.
Assuming a V8 engine, it's on the top, front of the engine. The thermostat housing is where the top radiator hose goes into the engine.
The thermostat on a 53 plate corsa sxi is in back of the water pump
Whatever the thermostat is preset to, probably 195 degrees F.