My 15 silverado 4wd 5.3L has 2200 miles. right now I am focusing mainly on the clunk and shuddering/vibration that happens on my truck when Its accelerating from 40-50mph and it shifts from 5th to 6th. It sometimes does the clunk when it downshifts to a stop.
you mentioned "with +/-2600 miles on the truck now and has spread to the 1-2, 2-3, and 3-4 shift. It has also begun doing it going up hills in 4th at certain rpms."
I am curious to see if mine will start doing that as well in all those shifts once I reach closer to 2600 miles
What is the status on your truck as of today ? I have my 1st appointment set for this problem on 10/14/2015.I am expecting nothing good from the dealer. So far they have been A**holes.