I have an '05 H2 that has a strange wind rattle coming from the roof. It only hapeens when I hit 70+mph. I thought it was the wind guard for the sunroof so I ripped it off, cleaned it up applied neoprene washers to the brackets and siliconed it down, but that wasn't it. I think it may be the front marker lights because they all have a little play to them but I'm not sure. Has anyone had a similar problem?
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I still think it's the wind deflector. No matter what you do to it, that thing will make noise. The only other thing that I've heard of is the trim around the top of the windshield..

The small black trim may look tight, but when you are at highway speeds, some can flap on the window and cause this same sound.

That's all I got.

 

Have the same problem , looks like a comman fault....but as it raining most of the time in England, dont hear so much

When u do get the problem solved, please post...as to what it is!!!

 

Same problem even removed the sunroof deflector...however I did notice that the black seal is not seated evenly and there is actually a space between the top edge and the roof all the way across. Is this normal?

 

I'll bet that is where you are getting your noise from. The plastic doesn't even really need to be hitting anything, just have the ability to transfer the vibration to the vehicle so it resonates inside. Investigate into what you can do to fill that gap, or stiffen the plastic so it doesn't vibrate, or both.

 

Same on mine.

 

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Thanks for the input guys. I think I'll add a couple more brackets to the wind guard and see where that gets me. If it works I'll let you know.

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HELLO, I HAVE A 06 H2 SAME NOISE NO SUN ROOF I WAS TOLD IT WAS CROSS BARS ON ROOF HAVE NOT REMOVED THEM YET........... ANDY

 

Well, that just threw a wrench into our thoughts.