GMC Sierra 2500 HD persistent wind noise above 50 mph, dealer unable to repair on GMC Sierra 2500 HD

Some GMC Sierra 2500 HD owners report experiencing persistent wind noise above 50 mph, particularly around the upper windshield area, which can resemble a "kazoo" sound in windy conditions. Users have noted that this noise often worsens in cold weather, suggesting a sensitivity to temperature changes. Aftermarket weatherstrips have been recommended as a potential solution for reducing wind noise around the driver's door, especially during crosswinds. Additionally, specific bulletin numbers, such as 10-08-58-001, have been referenced, indicating that dealers may require particular guidance to effectively address these concerns. Some owners describe the noise as akin to bugs hitting the windshield or large raindrops, highlighting the varying perceptions of the issue. Furthermore, problems with cab vents located below the glass on the rear wall have also been identified as possible sources of noise, particularly in models equipped with airbags. Given these challenges, exploring aftermarket solutions or seeking specific bulletin references may help in effectively resolving the wind noise problem.