Hello, so no wife! My neighbor came over to help me trouble shoot several things prior to my post the other day. When I cycle through every option on the dial, I get the same results. Blows outs colder on the drivers side, luke warm at best. I did notice that when I have the air recycling through the cab and not being pulled from outside it will get hot on the drivers side. Problem is, when the defrost is on, I am not able to have it on cabin air only.
I only have single climate control in the truck, not dual. From everything I've read, I'm thinking possibly back flushing the system may be where I need to go from here. So since I've already paid my mechanic shop to flush my system, I'll take it back to them to address the issue as it did not fix the issue.

 

Most coolant flushes don't involve back flushing the heater core.

 

The heater core was flushed last winter, not a coolant flush.