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Cats and O2 Sensors
So I just finished up a PS pump, Brake Booster and related hose install, looking at what's next. I am original owner 2006 6L Denali w/175K. I have battled the typical P300 code but have never had a Cat or O2 sensor code. I do seem to have less power even after plugs/wires, TB clean but not due...- Badwrench
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- Forum: Engine & Drivetrain
