How do you replace a alternator on a 2004 Chevy Colorado?

To replace the alternator on a 2004 Chevy Colorado, first disconnect the negative battery cable to ensure safety. Remove the serpentine belt by loosening the tensioner, then unbolt the alternator from its mounting bracket. Disconnect the electrical connectors and remove the alternator. Install the new alternator by reversing these steps, ensuring all connections are secure, and then reattach the serpentine belt. Finally, reconnect the battery cable and start the engine to test the new alternator.