The volume for your navigation is tied to the volume of your radio. To look into this error, we will need further information and a possible visit to your dealership for a diagnosis. If this happens again, please dial 1-(888)-4ONSTAR (1-888-466-7827) and request to speak with our Technical Team. They will be able to gather your information and provide the next best steps. Should you prefer to work over email, you can also reach our team at socialmedia@gm.com.
