We have a new-to-us GMC Acadia 2010 to pull our 3800 pound Coachman travel trailer.
The car overheats, occasionally when not trailing and frequently when we are. We live in South Florida and just completed a trip to Portland, OR so there was a bit of climbing and hot weather involved.
I drained/flushed the cooling system, thermometer checked the cooling and thermostat, and checked the fans and cooling relays. All seems in order.
Attached is the build list showing the options on our two-equipped. Everything seems to be there as needed.
A call to GM customer service says, "you are the only one with this problem."
When we visited our local GM dealership, the mechanic pointed out that the 2011 ad 2013 Acadias have much larger grills - and our car was re-styled to reduce the grill - and clearly cause the overheating
He suggested either "buy a Ford" or cut holes in the grill and pointed us to this photo that, according to the mechanic, was at one time recommended by GM.
Before I cut up my grill/bumper, do you have any other suggestions?
The car cools OK if I stay below 35 mph and manually shift down to second or third.
Thanks for the help. /Stu