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Negative long term fuel trims
Hi all, I've got a 2017 Yukon with 5.3, 80k miles. I'm having a constant problem with the engine loosing power, light throttle, it's very subtle and can also be felt during shifts. I was a GM tech for 25 years (got out in 2011) so I've got a very good understanding of almost everything...- EdMay
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- Forum: Engine & Drivetrain
