Radiator Hose Problems of Buick Verano

2013 Buick Verano, VIN [xxx]. Originally purchased in minnesota. Have had multiple problems. First, car was "hard-shifting" like it was having a really hard time locating the next gear to shift into. The hard shift occurs between 15-25 mph, and again between 50-60 mph. It is causing the car to accelerate and act very sluggishly. Have not had a single problem with this car until a long road trip relocating to utah in March 2015 that led up to all these new problems. Dealer says diagnostic shows nothing wrong, but when test driving, can feel and hear the hard shift. Attempted to fix. Problems went away for 2 months and then returned in late may / early June 2015. Second, when a/c is on full blast inside car and we use remote start to start the car, the car idles fine for 10 seconds. Then as soon as the a/c system kicks on in the car, the engine rev's up from 800 rpm's (normal idle) to about 1,500 rpm's and the engine is very loud. The dealer states "diagnostic computer says nothing is wrong. " we can hear how loud it is, and those are the cooling fans, but it's supposed to come back down to normal idle after a few minutes. We can have the car idling for 10+ minutes and it does not reduce in noise volume or rpm level. It continues to idle very high rpm's and does not sound like any other Buick on the gm dealership lot. Dealer mechanic's can hear there is a problem but refuse to fix it because their stupid computers don't say anything is wrong. So now we are experiencing 2 issues - the loud rev rpm noise in idle which is making the engine very labored sounding, and the hard-shifting problem that still hasn't gone away. There has to be something wrong with this vehicle's transmission, power train, or cooling system but of course gm won't fix it or recall it. I can't even find a recall list newer than 12/31/14.

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