How do you remove the oil pan from a 2003 Buick Century?

To remove the oil pan from a 2003 Buick Century, start by ensuring the engine is cool and disconnect the negative battery terminal. Lift the vehicle and support it securely, then drain the engine oil. Remove the exhaust pipes if necessary, unbolt the oil pan using a socket wrench, and gently pry it loose, taking care not to damage the gasket surface. Finally, clean the mating surfaces before installing a new gasket and the oil pan.