squealing noise

2007 PONTIAC G6
58,000 MILES • 6 CYL • FWD • AUTOMATIC
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JKAMKE15
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I have a 2007 Pontiac G6 hard top convertible; it makes a loud squealing noise when I accelerate. Stops when it down shifts. Could this be a belt issue?
Mar 29, 2011 at 9:09 PM
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SATURNTECH9
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Yes could be the belt you could have a weak belt tensioner is the noise worse with the a/c on?
Mar 29, 2011 at 9:34 PM
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JKAMKE15
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I am not using air (live in Wisconsin). It happens when I accelerate and as soon as it backs down it stops. Leak in a hose?
Mar 29, 2011 at 9:39 PM
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SATURNTECH9
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Sound's like you could have a weak belt tensioner that's what keep's your drive belt tight.If you have a/c on your car an it work's turn it on and see if the noise gets worse.
Mar 29, 2011 at 9:43 PM
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T5825DB
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Did you ever get this resolved?
Jul 18, 2011 at 11:34 PM
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X44+
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It seems to be known issue with resonator on the G6 HTCs. (g6performance.com) Maybe because of the exhaust's size, anyway had the same problem, whistling noise under acceleration between 2000 - 3000 rpm but no other time. Checked belts, tensioners, etc, etc, no joy. No longer under warranty I had a Magnaflow 10424 put in and that fixed all the weird noise, just sounds good. Good luck!
-jon
Nov 22, 2011 at 9:01 PM