Originally Posted by bluie5
I use mine all the time, towing or not. As mentioned before I don't use it in heavy traffic, hills, mountains, and on icy or wet roads.
Pretty much my thoughts.
I don't use cruise in the rain or wet roads. Many years ago, I had the rear tires break loose going up a hill in high gear with wet pavement on the highway. Thank God I didn't have the cruise control on!! The rear end started kicking out to the side, but I was able to catch it before it got too far. But I still got scary close to a jack knife @ 60mph.
I use my cruise on pretty much flat or slightly hilly highways. But on bigger uphill grades, I cancel the cruise and drive it manually. I find that the cruise control will allow a loss of a few mph as the hill begins and will try to get that 2 to 3 mph back going up the hill. As a result, the truck will downshift 1 or 2 gears and try to accelerate up the hill. That hurts the MPG numbers. By manually driving the speed, I can keep the truck from downshifting as much by waiting to get any lost speed back until the top or downhill side of the hill.
FAA A&P mechanic, ex-RV dealer parts dept
Retired B-52 Gunner/Flight Examiner, B-52 Crew Chief
2016 Jayco Eagle HT 29.5 FBDS w/ 15,000 BTU AC, 50 amp service, upgraded counter top, thermal pane windows, elec. stab jacks, outside grill, backup camera and MORryde pin box.
2011 GMC 2500HD DURAMAX/ ALLISON