How do you change spark plugs on 2006 Chevy Express 2500?

To change the spark plugs on a 2006 Chevy Express 2500, first ensure the engine is cool and disconnect the negative battery cable. Remove the ignition coil by unscrewing the bolts, then gently pull it off to access the spark plug. Use a spark plug socket and ratchet to remove the old spark plug, then install the new one by hand to avoid cross-threading, followed by tightening it with a torque wrench to the manufacturer's specifications. Finally, reattach the ignition coil and reconnect the battery.