Can't find Bluetooth in my 2013 Enclave

[Sara Schlachter Best]

Greetings: I have owned a 2013 Enclave since August. I was able to pair my iPhone with the Bluetooth right away and it has worked well until about a week ago. The Bluetooth symbol is no longer visible in the source tab on my touchscreen and when I go to settings>Bluetooth>New Device the Buick Enclave option is detected on my iPhone but I receive an error message right away when attempting to pair the phone that says Bluetooth not turned on or not in range. I have not been able to find any info in the manual to troubleshoot. Please advise! I need the Bluetooth for work.

SAB