New to the 6.0 engine and have one of many questions. When you turn her off and exit the vehicle, you can hear something spinning under the hood for a few seconds. Is this the turbo, and if so, is it normal for it to keep spinning after you shut off the vehicle? I'm positive my 7.3 didn't to it. Also, towed my camper to the dealership today. I set the brake controller as described in the owners manual, but it still did not lock up the brakes even to the gain setting of 10. The controller works great but wondering if it shouldn't be locking up when you slide the leaver while on maximum gain. Thanks