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airwolf912

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  • Drives
    2020 GMC AT4HD

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  1. airwolf912
    Same problem with 2024 HD AT4. 3800 miles. No sound for any indicators or radio. Happens more often in high heat condition. Dealer never heard of it before they claim.
  2. airwolf912
    2020 AT4 is averaging 20-21 plus highway at 75mph. Best is 35.7 The story for best is Laramie Wy. to Cheyenne Wy. all down hill for 60 plus miles.
  3. airwolf912
    My radio does the same thing. It is a service bulletin for a lot of GM models with no fix yet. Dealer says when a fix is found they will send a flash drive to update the system or down load over the On Star. 2 months and still waiting.
  4. airwolf912
    There is a service bulletin out on the issue. effects a lot of GM products. Unfortunately no fix at this time. Once they find a fix they will either update it over WiFi or with a stick you can plug in . ETA unknown at this time.
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