To be certain, you should:
* Consult a repair manual specific to your 1999 Oldsmobile Intrigue 3.8L V6. This is the most reliable way to locate it precisely. A Haynes or Chilton manual will have diagrams and detailed instructions.
* Use an online parts diagram. Websites like AutoZone, Advance Auto Parts, or RockAuto allow you to search for your vehicle and view diagrams showing the location of parts.
Be aware that working on your vehicle's engine can be dangerous. If you're not comfortable working on your car, take it to a qualified mechanic.