Question about 2004 GMC Envoy

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Loud air sound

Have a 2004 GMC ENVOY XL and I have similiar issues with a loud air sound when I start the suv but mine does not seem to stop after a few minutes and seems to get louder when I go up hills etc. The serive engine soon light has now come on and stays on. I am afraid to drive the envoy. Please help!!

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  • Jimb317 Jan 27, 2009

    I have the same code on my vehicle. I am just trying to figure this out myself. Let you know how I do?

  • Anonymous Mar 21, 2014

    whistling sound once SUV is started and while driving

  • Anonymous Mar 30, 2014

    while driving on the hwy at 50 mph it sounds like an airplane


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Sounds like you may have a plugged cat. you need to find out what code/s you are throwing...

Posted on Dec 09, 2008

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If there is an engine code po410 you have problems with your airpump. There are bulletins out on this situation.

Posted on Oct 19, 2008

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