Some owners of 2015-2017 GMC Sierra, Yukon or Yukon XL vehicles may complain about hood fluttering, vibrating or visible motion at highway speeds or over rough road surfaces.
Example of before/after. Top: bonding material applied.
Example of before/after. Top: bonding material applied.
Some owners of 2015-2017 GMC Sierra, Yukon or Yukon XL vehicles may complain about hood fluttering, vibrating or visible motion at highway speeds or over rough road surfaces. The inner and outer hood panels may not be sufficiently bonded together at all points. Apply panel vibration control material between the inner and outer panels.
Open the hood. Remove the 6 plastic fasteners retaining the underhood insulation pad using a trim tool and remove the insulation pad. Cover the engine and cowl area with a blanket or towel. Using a non-expanding two-part material such as SEM 3997 or equivalent to fill the voids between the panels. Reinstall the insulation pad and inspect/clean up any dripped material.
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