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  1. Engine & Drivetrain
    Hi, I'm trying to diagnose a problem with my 2011 Acadia. I've had some codes set and long term fuel trims seem to stay pretty negative -25 to -30. Short term bounces around +/- 10% maybe. Both banks run about the same. Doesn't seem to matter if its idle, cruising or hard accel. I'm thinking its...
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