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The thermostat on a 2003 Pontiac Grand Am 2.2L L4 Ecotec is replaced by removing the upper radiator hose and unbolting the thermostat housing. The thermostat can then be removed, a new gasket installed, and the replacement thermostat put in place.

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Q: How do you replace a thermostat in a 2003 grand am 2.2L L4 ecotec?
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