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The log above is after I deleted the flex. Seems to have leaned out the trims but nothing has changed regarding knock retard and rough idle.

In this log I added all the knock channels,...

Running 87 currently, I've tried different octane levels to no avail. I'll disable that and report back.

I have a 07 Avalanche with a 5.3 in it that's driving me nuts, it's been months. Had multiple mechanics look at it. One day it just started running terribly and fat.

All stock except DOD was...