I bought my truck from a GM dealer in October. It has run flawless everyday until about 2 weeks ago. The transmission started acting up. Some examples. Like today I started it and I let it run for a few minutes and then put it in reverse and I barely had my foot on the gas and it started to like Whind up for a few seconds and then the truck kind of jerked and then it started driving fine. Lately when I take off it will shift from 1st to 2nd extremely hard and then after that it shifts smooth. So does anyone have any ideas? Its a 2006 Chevy Silverado 1500 2wd automatic with tow mode. Im taking it to my friends transmission shop tomorrow and hes going to see if theres anything wrong with it and put some new fluid in it.