How install block heater 2010 Buick lucerne 3.9 engine?

To install a block heater on a 2010 Buick Lucerne with a 3.9L engine, first ensure the engine is cool and disconnect the battery. Locate the freeze plug on the engine block, usually on the passenger side, and remove it using a socket and ratchet. Then, insert the block heater into the opening, securing it according to the manufacturer's instructions, and reconnect any components you removed. Finally, reconnect the battery and test the heater by plugging it in before starting the engine.