Looks like i came in late. Purchased used 2014 silverado ast august of 2017. 27000 mies. I now have 92000.transmissionhas has whine in lower gears1-3 since i purchased, dealersshipp says it is normal. Had tran flushed at abt 40000 fluid was black. Also truck has cyclical vibrations and hesiation when acclerating hard like out of rest stop. Dealervship had truck for week, said could not duplicate! They only drove it38 miles!