How do you change the spark plugs on a 94 Cadillac Fleetwood?

To change the spark plugs on a 1994 Cadillac Fleetwood, first, ensure the engine is cool and disconnect the negative battery cable. Remove the spark plug wires by gently twisting and pulling them off the plugs. Use a socket wrench with 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. Reattach the spark plug wires, reconnect the battery, and start the engine to ensure everything is working properly.