I've had my Bolt for less than a day and driven about 10 miles so far. I tried using Lane Keep Assist on the drive home and was told that the system was unavailable. It's enabled in the Vehicle Settings screen. I'm pretty sure I was going faster than 37 MPH, which is the lower threshold of the system. I haven't checked the windshield yet to see if there is something blocking the sensor. Am I missing something here? And is there a way to make sure it's enabled all the time? I've checked the manual and it's not clear if it's enabled all the time.