Suburban 2013 radio and navigation
 

Hello and good day everyone
I have Suburban model 2013 and I am facing a problem with radio and navigation. I bought my car from USA then I exported to Saudi Arabia but in Saudi Arabia radio frequency numbers ends with even numbers. such as 90.0 98.2.
and the navigation is for United States maps only.
so I am trying to ask if it's possible to reprogram the radio or do anything so it can read frequency that ends with even numbers and install the Middle East navigation maps

thanks