Truck Brake issues....

[ADR]

To be honest, I only checked the rear hoses since that is where the noise is coming from. Both look to be in perfect shape.
The fluid level in the master has never changed. No signs of a leak anywhere.
I do have a laser thermo, I'll do a road test and check the heat on the rotors.

Not saying it's your issue just an FYI - Hoses can appear to be fine externally while being degraded internally. What you're looking at is an external wrap/layer

 

[kshaw]

Creeping pedal like you're describing is in the master cylinder.

Yes. I agree. These are usually not that expensive but you have to bleed the cylinder before installation.

 

[Overboost44]

I would go with a leaking piston cylinder. New calipers are not expensive but you could also try a rebuild kit. I have done it before, there is some fiddling to get those gaskets in correctly but it can be done with patience.