[ChevLoRay]

Good deal. Sounds to me like Click and Clack's advice to the lady on Saturday may have been helpful to you. So, there's a vacuum line hooked up to this door that enables it to actuate and that it happens on startup/shutdown, explains it. Thanks for letting us all know.

Stupid me....should have looked more closely at the picture. The electric motor is plainly visible. No vacuum connection showing. So it's powered on start-up and at shut-down it is not, allowing for the movement at both times. Sorry to have sounded stupid, but it's my right to be wrong and I have to exercise that right, or I'll lose it.