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

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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” … Read more

Dual Level Portable Charge Cord Stowage and Troubleshooting Information – 2022 Chevrolet Bolt EUV & Bolt EV

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2022 Chevrolet Bolt EV

NHTSA ID Number: 10198875 Manufacturer Communication Number: 21NA093   Summary This bulletin provides proper stowage and troubleshooting information/instructions for the Dual Level Portable Charger (RPO EKT).     1 Affected Product Vehicle MAKE MODEL YEAR CHEVROLET BOLT EV 2022   Condition Stowage of the dual level portable charger and two swappable cordsets is not detailed in the … Read more

Hood Ajar Message Displayed on Driver Information Center (DIC), Hood May Not Open Using Any Electrical Release Buttons, But Will Open Using Manual Release Cable – 2020-2021 Chevrolet Corvette

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2021 Chevrolet Corvette

NHTSA ID Number: 10198876 Manufacturer Communication Number: 21NA094   Summary This service bulletin provides repair information to correct a customer concern of hood ajar message displayed on DIC, hood may not open using any electrical release buttons, but will open using manual release cable.     2 Affected Products Vehicle MAKE MODEL YEAR CHEVROLET CORVETTE 2020-2021   … Read more

Cooling Fans Continuously Run, Malfunction Indicator Lamp (MIL) Illuminated – DTC P2B60, P1098, P26BB, P149D, P0421, and/or P0606 Set – 2021 Chevrolet Silverado & GMC Sierra 1500

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2021 Chevrolet Silverado 1500

NHTSA ID Number: 10198877 Manufacturer Communication Number: 21NA096   Summary This technical bulletin provides a procedure to program the ECM to correct the customers concern.     2 Affected Products Vehicles MAKE MODEL YEAR CHEVROLET SILVERADO 1500 2021 GMC SIERRA 1500 2021   Condition Some customers may comment on one or more of the following conditions: •   … Read more

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

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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 … Read more