They did my initial break-in cycles because the drive home was beyond the mileage recommendation by Yukon. They made about 6 runs with cool down cycles before I got it. Now all I have to do is the 500 mile cycle and then everything says Im good for whatever I want to do, including towing. Have an appointment for the inspection and all next Friday. I plan on making a 200 mile trip the next day pulling a 24’ stock trailer so I hope it is up to it. As far as I know there isnt any special break-in for towing conditions.