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Is there any certified GM techs in the group? U0109 is driving me insane.
2009 Tahoe 5.3L DLC - P0506 & U0109 Repairs and actions so far. - replaced FPCM 3x - PROGRAMMED 4x (last 2 times at Chevy dealership) - replaced fuel pump - replaced throttle body - replaced EVAP purge valve - replaced EVAP vent canister - replaced FPCM Connector - cleaned both bell housing...- Jmix91
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- Forum: Engine & Drivetrain
