I have a 2014 Enclave and my navigation screen will not come on at times and the. After 15-20 minutes of driving it will come on. Obviously when it doesn’t start up my radio and rear camera don’t work. It also effects my turn signals. Local dealership says I need a whole new system - $1,500, On a 5 year old vehicle. I don’t think so. Has anyone else had this issue and been able to fix it without replacing the whole system? I have had nothing but trouble with my car in the last year. Starting to think I won’t ever buy a Buick again.