Alright guys. I recently bought a 2016 Silverado 4x4 w/ 75k miles. When i first got it the idle was a little rough but thought coil packs, plugs and wires would do the trick. When i would remote start my truck i would get the misfire code and when driving and slowing down my transmission seemed to downshift hard. Along with a loss of power i reset the code and it seems to run better but still feel a rough idle. I changed the cylinder 5 plugs, wire, and coil got a fresh oil change and cant seem to the find the problem. Also sometimes my truck doesn't go into v4 when it used to. I went to a relatives shop and he hooked it up to a reader and it said everything I changed was doing good but i had 50 misfires in like 1 min just on that cylinder 5. Is there anybody out there that knows what the issue could be I'm lost!