Question about 1992 GMC Sierra

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While cruising at 65mph if I accelerate slowly I get rough vibrations. If I punch the accelerator it goes away? Any idea what that could be?

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  • Ricky Gittins
    Ricky Gittins May 11, 2010

    Is the vibration in the steering wheel ? or do you feel it in the seat ? it's not an o2 sensor,

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  • 118 Answers

Could have a bad O2 sensor. When the sensors go bad the ecu goes to a default mode which in your vehicle might be a bit rich. By accelerating hard you are giving it more air thereby leaning out the mixture.

Posted on Nov 17, 2009

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