How do you replace the spark plugs on a 2004 Cadillac SRX?

To replace the spark plugs on a 2004 Cadillac SRX, first, ensure the engine is cool and disconnect the battery. Remove the engine cover, if necessary, and carefully detach the ignition coils by unscrewing them and pulling them out. Use a spark plug socket to unscrew the old spark plugs, then install the new plugs by hand to avoid cross-threading, and tighten them to the manufacturer's specifications. Finally, reattach the ignition coils and reconnect the battery.