i have the same problem, im going to go to the dealer and see if i can get it taken care of.

 

Just got back from the dealer for the 2nd time with the mirror whistle. First time they ordered the wrong part #. This time the mirror came in painted and should not have been. This was even after the service writer said he looked at the mirror that came in. They ended up swapping the brushed aluminum cover of the old mirror and put it on the new one. They also gave me 2 free oil changes and a tire rotation for my trouble. I am still considering a letter to the service manager and GM but may cool down soon. Will know shortly whether this fix worked.

 

was there a TSB on this? i cant remember

 

Not that I know of but can't remember either

 

09 hhr same wind noise from drivers side,will buy those mirrors bra in vinyl,might cure the noise,if not will certanly will keep bugs and rock chips,away from the original color.
happy motoring guys.
citation18 member

 

Here is the whistle fix.

https://www.chevyhhr.net/forums/show...-001&page=3#22

 

They did not have to replace mirror. They just put some gasket material under the cover to seal the air out. It takes about 30 mins and they do not replace anything.

 

Don't leave them on all the time or you will have to. Often it will cloud the paint on the mirros if it gets wet and sits in the hot sun.

Bras and Mirror bra's are for short term use only.

 

My '10 LS was whistling the other day while I was doing 70+...doesn't do it until I reach those speeds. Glad I did a search and found a highly probable cause.