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weird defect/design flaw w/some 2015-2016 GM large SUVs

Theres SUVs and No One Seems to Have a Solution » AutoGuide.com News

Apparently, they're complaining of some wind buffeting and vibrations.
The (Supposed) Fix

GM issued a preliminary information bulletin (PIT) over the issue. Poorly attached roof sheet metal is the main issue that GM looked to fix and instructions for doing so are located in PIT5318B. To perform the fix, technicians have to remove the vehicle’s headliner and inspect the roof bows for proper bonding with the roof sheet metal. If there is an issue, the bonding must be completely redone, which means new panel control vibration material is packed into the roof of all SUVs that have received this fix.

The problem with this PIT, as many customers have learned, is there is no guarantee it is going to help. The PIT reads:

In some cases, correcting the roof bows may not eliminate the body pressure booming issue due to the fact that the roof is being excited by some other input(s). These other areas will need to be addressed if the body pressure booming is still present at the completion of this PI.

Those other areas include tire issues, exhaust back pressure valve issue and rear axle issues.
More in the linked article.

Weird. I've never heard of anything like this before. But then again, I have no interest in such vehicles or anything in their size class.

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