Hello, guys. Vehicle is a 2008 Yukon XL with the 6.2L motor, AWD, 6L80E transmission. I have been using 93 octane fuel with no ethanol. The engine was rebuilt about 9500 miles ago. The compression ratio did increase a tiny bit, by approximately 0.1.

I'm having some trouble finding the cause of detonation. The problem began within the past few weeks. I can hear the detonation when going up a hill, under what I'd consider moderate load. I logged some PIDs using version 8.3.22. Would someone mind looking at this log to point me towards the cause of detonation? Or perhaps I need to log additional PIDs or perform other checks?

Thank you for any help.

detonation (moderate load) April 2022 batch 3.pld