My 2011 logs trailer mileage on 5 different trailers. If the trailer has electric brakes, which yours will, it will automatically pop up when you start the truck. If the trailer doesn't have brakes, you will have to manually engage the trailer odometer function.
Be ready the first time you connect the trailer, read the manual beforehand. If a trailer with brakes has never been connected, it will come up as Default. At this point you will have an opportunity to change the name. I recommend giving it a unique name.
My truck knows my current camper as 'Durango'. At a later date I connected a car hauler and 'Durango' popped up. It provided an opportunity to select a different trailer or create a new one. I created 'Hauler'. Now the Hauler miles do not log as Durango.
If I connect a utility trailer that does not have brakes I have to manually go into the system and tell it I'm towing 'Flat', the name I gave it. Once I unhitch Flat, I have to remember to manually tell it I'm no longer towing Flat or it will continue logging miles for Flat.
I have not deleted the logs of two other trailers I no longer own. This preserves a record of how many total miles this truck has towed any trailer
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