To be certain, you should:
* Consult a repair manual: A Haynes or Chilton manual specific to your year and model will show you a diagram and the exact location.
* Use an online parts diagram: Many auto parts websites (like AutoZone, Advance Auto Parts, etc.) allow you to look up parts diagrams for your specific vehicle. Search for your car and look for diagrams of the intake manifold.
* Search online forums: Buick enthusiast forums might have pictures or discussions pinpointing the location for similar models.
Important Note: Because the location isn't perfectly standardized, relying solely on a general description is risky. Using a repair manual or parts diagram is strongly recommended to avoid misidentification.