Well, 2 weeks and $400 later, I got my Toyota Tacoma all fixed. Not only did I need to replace the servo motor which flips the blend door and opens the valve to the heater hoses, but discovered the heat/cool rotating dial has a brain that tells the servo motor to turn. My neighbor, who works at Toyota got me the parts for half price, so all in all, I learned something new and probably saved at least a grand.