This is a funny post.
Somebody asking about a Hyundai and somebody posted the manual from 2020 Silverado???
It convolute the issue. LOL!!!
In my experience, GM seems to have AC problem more often than other brand, not sure why.
It is probably needs some fixing around 7 years.
As for me, I agree with the tech and as stated above.
Keep the condenser, that is the part usually in the area of the radiator.
Spray them with soap and rinse them with water once a year.
Clean the space in between the radiator and condenser if there are leaves.
Turn on the AC in the winter once in a while unless you are in a freezing area.
Not too difficult to do if you are in the south, we have days above 60F even in the winter.
Change the Cabin Air Filter if it is there.
Otherwise, clean the evaporator also (mostly for 90s car).
Another one, make sure the condensate line usually under the passenger side is not clogged.