I recently (within last 12 months) had the blend door and intake door actuators replaced on my 2010 Nissan Titan. They were located behind the dash on both the drivers and passengers side of the truck. It required removing the dash and cost $750 at the dealership. The a/c blows harder on the passenger side and less on the drivers side and their is air flow constantly coming from the defrost. Dealer is saying it’s the mode door actuator and wants another $750 to remove the motor and replace the dash. How many actuator motors are behind the dash? How hard is it to remove the dash and replace the motor? Is there any step by step instructions on how to do that?