[10redrocket]

If your order is in the main system, the order is pulled automaticly. Orders are pulled once a week to the GM mainframes, I believe early AM Thurday, at least my dealers are.
If you are expecting a call before the order is placed, I suspect it is not entered as a sold order OR if so may be on hold.
Just because you put an order in workbench and got a printout doesn't mean your order is actualy placed.

I know this because I sat down with the one person at my dealer that places all the orders.
If you are concerned, go to your dealer and ask to see the person that places the orders. Ask them to show you the order on his system and inquire as to how the system works, I sat with this person for an hour and was surprised at how it works.

This from my own experience, your dealer may be different.