I do know for a fact that when my Dad sold cars, the parts and service departments were where the majority of the money was made. They carried all the overhead for the dealership and the sales department was there almost as a gateway to sell those parts and services.
Yep. That's why vehicle option "subscriptions" (mentioned in another thread) and "right to repair" are both such big issues right now. Manufacturers are working to find ways to force you to go back to that dealer service department whether you want to or not.
