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Discussion Starter #1
When I turn the ignition on my 2009 Traverse and back out of my driveway and then proceed forward I can hear two noises which sound like their coming from the front end area when the vehicle reaches a[/color] speed of exactly 15mph. It happens everytime. I don't know if this is a switch or something activitating or ? It only happens after the vehicle has been turned off and then restarted. I've only noticed it upon backing up and then going forward. The noise is not heard when I am on the road stopped at a light or stop sign when I proceed on and reach 15mph. Anybody else heard this noise or have an idea if it is normal or not?
 

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ABS and maybe a couple of other things doing self tests.
 

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Discussion Starter #4
It's almost like a knocking noise you here twice when you reach that 15mph speed. Two Chevy dealer service advisors had no idea what it was when they got in and listened to it. They said they would check for TSB's on it.
 
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