Where are the 2004 Chrysler Pacifica 3.5 liter engine spark plugs?

The 2004 Chrysler Pacifica 3.5L engine's spark plugs are located on top of the engine, accessed by removing the plastic engine covers. They're arranged in a "V" configuration, one per cylinder. You'll need to consult a repair manual or online diagrams specific to that year and engine for precise location within that top-mounted arrangement, as it can vary slightly depending on accessory placement. Be sure to disconnect the negative battery terminal before beginning any work.