I use cruise all the time, if its hilly I shift off overdrive and cruise a little slower. I watch my Torque Load, Exhaust Temp, and Water Temp, all the time. So far no problems with any.
I'll throw my two cents in. I use cruise control and tow/haul mode in all exept Very hilly terraine or Very wet or poor road conditions when towing my 3055RL. If the transmission starts down shifting on steep hills, then I'll drop the cruise and go to foot control to save fuel.
Clark
Dittos. The GMC's do a really good job integrating the cruise - engine - and trans controls to try and maintain speed. What I have found is the rest of the vehicles, specially those with "those other brands" ended up slowing down too much when behind them - always have to pass
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