I have a 2008 chevy Tahoe hybrid That has a random six cylinder misfire. Took it in to multiple mechanics and they cannot find an issue. The system keeps resetting and when they put it on the diagnostic machine They cannot find any issues with the system. They have done smoke test on the evap system and found no problems there. They've drove the vehicle for weeks on end and have never acted up on them. Medicine as I did it back and take it on a trip.Or drive more than an hour.I'm always getting a number six misfire , and it comes and goes. Any insights on what might be causing this issue?Thank you
