Today I pulled my motorcycle trailer for the first time with my awd Acadia. The trailer and the dirt bikes probably weigh no more than 1500 lbs or maybe a little less. I left the shifter in the L position so I could manually shift if I wanted too. On the freeway you could hardly tell the trailer was there as long as the road was flat. For the most part 6th gear was too tall for anything except very flat roads. In 5th gear the engine seemed much happier at the speed I was traveling which was about 60 mph. I started out at an elevation of 1000' above sea level and started climbing to my final destination of 6800'. The first part of the climb was the steepest and I kept the trans in 3rd or 4th with shift to 2nd on slow tight corners. The car pulled the grades fine and I was able to keep up with traffic without ever having to push the engine really hard. The temp gage did climb several notches above the 210 mark and at that point I turned off the A/C for the remaining distance. The temp did drop back down but would again climb back up in tight corner and slow moving traffic. At no point did it ever overheat, but the outside temp was only in the high 70's or very low 80's. There was never a problem with braking, and the handling was unaffected also. If the trailer had been 3000 lbs or greater I feel the car would have struggled and possibly overheated or come close to it. I don't think there would be any problem pulling a 3500 pound load on mostly flat ground and at a lower altitude. The vehicle is rated for 4500 lbs, but I would not pull that much unless it was at sea level, a cool day, and the car was not overloaded with people and gear.