Here is the GM Tech 2 Scanner PATHING DOCUMENT that every TECH 2 Owner should have. You work BACKWARDS from what you want to see.
See the attach PDF Document:
Look at MISFIRE in the chart and on the Tech2 Go to Special Functions, Powertrain and then misfire graphic
Misfire Graphic – Engine > Engine Controls > Special Functions > Powertrain Control Module
Misfire Graphic – Powertrain > Special Functions
Misfire Graphic – Powertrain > Special Functions > Special Functions (PCM)
https://mega.nz/#!JEwwXCLR!5EGrMvZegLzKzjB8pdJ_3ahPwNi2sdejVtmjAcob3eE