If my truck is idling the truck will not produce heat. I have to be driving it down the road in order to get heat or air conditioning.I hope somebody has an idea what it could be.

There is an air pocket in the cooing system (coolant)
It's either low, which is most likely, or there's a restriction at the heater core.
It needs to be checked right away.

Add coolant to the expansion tank, until it comes out the air bleeder plug. The air bleeder plug is located where the top radiator hose attaches to the engine. Fill with a 50/50 mixture of G-05 antifreeze and distilled water. This will help eliminate air pockets in the cooling system. If the problem persists, reverse flush the heater core.

This link should help:

https://www.askmehelpdesk.com/cars-t...ml#post2651405

Thank you so much I will Check it first thing in the morning.. Take care, Lissa : )

Both of you guys that responded are great and helpful, I hope by tomorrow I will have heat in my Dodge again! Take care, Lissa : )