The spark plugs on a 1997 Chrysler LHS (assuming the 3.5L V6 engine) are located on
the top of the engine, under the plastic engine cover. To access them, you'll need to remove the engine cover. They are arranged in a "V" pattern, following the layout of the cylinders. You'll likely find them fairly close to the valve covers.
However, a precise location requires referring to a repair manual specific to your 1997 Chrysler LHS's engine. A Haynes or Chilton manual will have detailed diagrams and instructions. Using a repair manual is strongly advised before attempting this work, as incorrect procedures can damage the engine.
