I don’t have a service manual for the Dart and don’t recall seeing anything about it in the owners manual.
I was under the hood this afternoon adding some coolant before the snow hits tonight and bitter cold tomorrow, and took another look with a flashlight while there.
Seriously what I could see of the belt looked nearly new. I remember changing serpentine belts on my Ram 5.9 and a Ford 3.8 years back after seeing the inner ribs were cracked. The ribs on my Dart looked pretty good.
I guess I’ll talk to the manager of the garage next week when I take the car in for his opinion.