What is wrong if I have warm air blowing from my AC and it is set at MAX at 67

What is your question?

I do not hear anything unusual, it blows normal but just warm air,..sometimes in the mornings, the air is cool not cold and I park my car in a garage at night. During the day my car is outside and when I leave in the latter part of the day it only blows warm/hot air. There are no leaks in the garage or where I park everyday.

What makes this problem better or worse?

nothing seems to work,..I have not try to add coolant, I don't know how to

How long has your 2018 Chevrolet Impala had this problem?

a few weeks