How do you replace a radiator on 2006 Buick terraza?

To replace the radiator on a 2006 Buick Terraza, first ensure the engine is cool, then disconnect the negative battery cable. Drain the coolant by removing the drain plug at the bottom of the radiator, and disconnect the upper and lower radiator hoses, as well as the transmission cooler lines if applicable. Remove any mounting bolts holding the radiator in place and carefully lift it out. Install the new radiator by reversing the removal process, ensuring all connections are secure, and refill the coolant system.