How do you change thermostat 2002 Oldsmobile Intrigue?

To change the thermostat in a 2002 Oldsmobile Intrigue, first ensure the engine is cool and disconnect the negative battery cable. Drain the coolant from the radiator, then locate the thermostat housing, which is typically near the engine block. Remove the bolts securing the housing, take out the old thermostat, and clean the mating surfaces before installing the new thermostat. Reassemble everything, refill the coolant, and reconnect the battery.