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    Put in new alternator now engine idle is off and engine stalls

    This is what I suspected so thank you for suggesting swapping out the alternator. Will keep you posted once it is done.
  2. T

    Put in new alternator now engine idle is off and engine stalls

    Thank you for your suggestion - we have checked the belt and it is properly installed.
  3. T

    Put in new alternator now engine idle is off and engine stalls

    I own a 2003 GMC Yukon XL 1500 4WD 5.3L and recently put in a new alternator. After installation I started the Yukon and noticed that the idle is not correct and the engine stalled. I drove the car around hoping that the computer would reset, but to no avail. I charged the battery overnight...

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