The camshaft position sensor (CMP sensor) on a 1997 Plymouth Grand Voyager with a 3.0L engine is located on the
passenger side of the engine, usually
near the front of the cylinder head. It's mounted directly to the cylinder head itself, and the sensor points towards the camshaft. You'll see a gear-like component on the camshaft that the sensor interacts with.
However, precise location can vary slightly depending on the exact engine configuration. It's best to consult a repair manual specific to your 1997 Plymouth Grand Voyager 3.0L engine for a diagram and exact location. A Chilton's or Haynes manual would be helpful. You can also find diagrams online, but be sure to use a reliable source.