I think it's really 2500, but, "somewhere" in that neighborhood. I suspect it kinda depends on where you're doing the towing too. If you were ALWAYS climbing mountain roads, I'd put the limit lower than if you were mostly on the "flat".
But whatever you do - I would strongly recommend you DO NOT try to change the tune somewhere out in the boonies. People that do that seem to have trouble with tunes that don't load properly and they're suddenly stranded.
If I'm towing, I load the tow tune before I leave the house and don't take it off until I return, even if some of the driving is not towing. The only place I ever change my tune is in my garage.
- Jack
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