Mine was doing the same. I wasn't paying attention to it today when I dropped my son at school but will take a look next time I am in the vehicle. I only have 1200 miles on the truck and the first few drives it did not work but then started working after I made an appointment with GM service. I attributed it to the software "learning" during the first few drives. But then it started only working intermittently. Not sure what the deal is, I am logged into my google account as well and have downloaded the offline maps and it still isn't consistent.