Assuming you're saying that you drive 70 with the sunroof open, well, I'm not sure under those conditions any vehicle is going to be truly quiet.
If you're not driving with the sunroof open at those speeds and the noise is still excessive, are you sure the noise is coming from the roof and not elsewhere? Like the windshield?
The noise seems to be coming from the wind deflector. This is with the roof closed. All is quiet until I get up to 65 and then it gets really loud.
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2005 H2 SUT Lux *sold*
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