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    Lean Knock - Best practices for testing ROOT cause?

    Long Story I supposed. 03 Denali 6.0 Drive by wire non flex fuel . In a c1500. As stock as can be though,no aftermarket upgrades. Was tuned to remove VATS and allow a 5 spd conversion. There are no rear o2 sensors and no means to connect in the aftermarket harness. Fronts were left...
  2. H

    New here Howdy!

    Currently have 3 trucks 1989 c1500 TBD 1996 Chevy Tahoe 5.7 2003 Yukon XL 6.0

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