why is my heater blosing cold air no matter what setting it is on?

What is your question?

Last night my heater in my 2015 GMC Canyon stopped heating. It is blowing cold air no matter what setting I have it on or high I set the temperture.

What makes this problem better or worse?

The problem is constant. There is no heat getting inside the truck.

How long has your 2015 GMC Canyon had this problem?

2 days