As you all probably know, diagnosing misfires can be a real pain. I wanted to post some resources that I found this go around that took some of the guesswork out of figuring out which cylinder was the culprit. The key for me was to get a scan tool that will read Mode $06 data on the OBDII. I got a BlueDriver module ($100) and the free software to to that.
The cylinder misfire information in Mode $06 is TID:53 ID:01 - TID:53 ID:08. You will have to complete a drive cycle for the misfire tests to complete. I will try to attach documents and links with information about Mode $06 troubleshooting.
I took my truck to a shop because I suspected a coil going bad. He was unable to find any misfire information, replaced a corroded battery terminal and gave me the truck back. After a bunch of research, I was able to find the the tool I needed and was able to get data that showed cylinder 6 was misfiring. I got a new coil and replaced #6 coil and all is well.
The image above is the report from the BlueDriver software that identifies cylinder 6 misfiring.

 

Neat!

 

15ba is a hexadecimal number = decimal 5562.
That number is outside the max limit of 3600.
If the shop cleaned the battery terminal first then tried to look at test 53, the data would have been cleared when power was removed for cleaning.,
Good luck.

 

Yup, I don't know if they checked before or after the battery terminal.
3600 is also hexadecimal. So 15BA is under the limit.