How do you replace the block heater in a Pontiac vibe?

To replace the block heater in a Pontiac Vibe, first ensure the engine is cool and disconnect the negative battery cable. Locate the block heater, typically found near the engine block, and remove the old heater by loosening the retaining bolt and disconnecting the wiring. Install the new block heater by inserting it into the designated hole, securing it with the bolt, and reconnecting the wiring. Finally, reconnect the battery cable and check for any leaks or issues before starting the engine.