Mrs. Layoutshooter had the distinct pleasure of having a coolant hose blow out just after we started up the mountain going west on I70 out of Denver. We had JUST left the TA, saw no problems there. Only went about 15 miles when it blew. It only took 2 hours for a truck to come up and fix it. It was the hose behind the fuel tank. It runs from the engine to a junction box and then to the APU from there. I cannot see that hose to check it. I think that I will have ALL of the APU and sleeper hoses replaced when we get home in November. What a pain!!