This service bulletin provides a procedure to replace both front door seals to correct a customer concern...
Chevrolet technical service bulletin 21NA101 for 2020-2021 Chevrolet Silverado 1500 and 2020-2021 GMC Sierra 1500.
- Bulletin number
- 21NA101
- Component
- Structure
- 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.
Owners of these vehicles have filed 81 complaints in the body category.
Vehicles covered
- Chevrolet Silverado 1500 2020-2021 20202021
- GMC Sierra 1500 2020-2021 20202021
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