Whistle or Hoot/Woot Noise Heard from Under Vehicle in Cold Ambient Temperatures – 2019-2021 Cadillac XT4

2021 Cadillac XT4

NHTSA ID Number: 10199264 Manufacturer Communication Number: 21NA090 Summary This service bulletin provides a repair procedure to correct a customer concern of Whistle or Hoot/Woot Noise Heard from Under Vehicle in Cold Ambient Temperatures.     3 Affected Products Vehicle MAKE MODEL YEAR CADILLAC XT4 2019-2021   Condition Some customers may comment on a “whistle” or “hoot/woot” …

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Howl, Hoot or Whistle Type Noise when Driving in Crosswinds – 2020-2021 Chevrolet Silverado 1500

2021 Chevrolet Silverado 1500

NHTSA ID Number: 10198878 Manufacturer Communication Number: 21NA101 Summary This service bulletin provides a procedure to replace both front door seals to correct a customer concern of Howl, Hoot, or Whistle Type Noise when Driving in Crosswinds.   Condition Some customers may comment on a noise in high crosswinds originating from the vehicle “A” pillar area. The …

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