We had one blower replaced a few years ago. I think there are two blowers (one for the left side dash and one for the right) and both are located centrally above the front heat register and behind the drawer and small table top right in the middle between the pilot and copilot's seats. Mike Flowerday replaced ours after removing the two cabinet doors above the front heat register. He also had to remove the DISH receiver, Bose control box and TV (roof) dish auto-aim control box in order to access the blowers. I believe it was our right-side blower that went bad... and was making so much noise we couldn't hear the radio or each other while traveling.