I have a 2005 dodge 2500 with the 5.9 diesel and when the heater is on it blows hot air out of the passenger side and look warm out of the driver side

The first thing you want to do is to make sure that the engine is getting to the proper operating temperature. If it is not at the proper operating temperature it could possibly cause a lack of desired heating in certain areas. Beyond that, although you seem to indicate that the "all new blend doors" are "operating great", I would still suspect climate control system concerns from the control point of view. Check this second. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops