How do you change spark plugs on my Chevy Astro van?

To change the spark plugs on your Chevy Astro van, first, ensure the engine is cool and disconnect the negative battery cable. Remove the ignition coil or spark plug wires carefully to access the spark plugs. Use a spark plug socket and ratchet to unscrew the old plugs, then clean the area before installing new plugs, making sure to gap them according to specifications. Finally, reconnect the ignition components and the battery cable.