My C6 converable has a humming noise in the rear. Always stays the same even when driving. When I stop the car and turn it off the hum stops. It does not affect the operation. What could it be?
My C6 converable has a humming noise in the rear. Always stays the same even when driving. When I stop the car and turn it off the hum stops. It does not affect the operation. What could it be?