Thread: Hissing brake sound on '09
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Old 12-03-2009, 09:14 PM
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s_c5519 s_c5519 is offline
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Default Re: Hissing brake sound on '09
ok, looks like I have the answer?... I called the service dept at Legends Hummer in AZ and he said the hissing is normal and comes behind the firewall... The '09's no longer have the hydro booster that connects into the brake system. It is upposed to be a better setup. The ones ('08 and under)with the hydro booster would leak and make whining noise when turning...

Sound right? any brake experts here?
Last edited by s_c5519 : 12-03-2009 at 09:23 PM.
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