How Do You Replace the Radiator in a 1998 Chevrolet Lumina?

To replace the radiator in a 1998 Chevrolet Lumina, start by draining the coolant from the radiator and removing the negative battery cable. Next, disconnect the upper and lower radiator hoses, along with any electrical connections and the transmission cooler lines if applicable. Remove the mounting bolts that hold the radiator in place, lift out the old radiator, and install the new one by reversing the disassembly steps. Finally, refill the coolant, reconnect the battery, and check for leaks.