Problem with heater on driver's side.

What is your question?

Hi..my lexus has dual temp controls. Does the dash have to come out when replacing the blend door servo motor or does the dash only come out when its the passenger side. Also how many heater cores are on my car? I thought only one until today, confused. Thanks for any info. trying to verify some things I have been told before shoveling out more money. Thanks again...:)