What is your question?
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What is your question?
Sync comes on when I first start it up. Stays on until I shut engine down. When I start it back up the screen will not come on. I let the car sit for an hour the restart it then screen comes back on . If I unhook the ground cable on the battery the turn car off for about 15 minutes then hook back up then restart engine it will come back on. Tried resetting but that did not work.

1 Reply
This could be either a software or hardware concern. Ensure you do not have any cables or phones attached to the vehicle when you are having the concern. Testing will be needed via diagnostic tools that are capable of communication with the SYNC system components.