Hi, Imo. Here's my take on using cruise control while towing.... it's ok on level interstate highways. However, once the terrain gets to be rolling hills or mountains I find the cruise control causes the transmission to downshift or hunt between gears more often than if you were just using your foot on the gas pedal. The result, in hilly terrain, is worse fuel economy and it's harder on your transmission.
My personal recommendation would be to use cruise control only on level terrain.
Regards,
Steve
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