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To install a thermostat in a Buick Lacrosse, first ensure the engine is cool and disconnect the negative battery cable. Drain the coolant from the radiator and remove any components obstructing access to the thermostat housing. Unbolt the thermostat housing, replace the old thermostat with the new one, ensuring the gasket is in place, and reassemble everything. Finally, refill the coolant, reconnect the battery, and check for leaks.

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1w ago

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