To be certain, you should:
* Consult a repair manual specific to each year: A Haynes or Chilton manual for each year will show the exact location of the heater control valve.
* Use a parts diagram: Online auto parts websites (like AutoZone, Advance Auto Parts, etc.) allow you to select your year and model and see diagrams showing the location of parts.
Relying solely on information from a forum or general advice online is risky when it comes to car repair. The slight differences can mean a significant amount of time wasted searching in the wrong place. Use a year-specific diagram or manual for accurate information.