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Brummie99

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About Brummie99

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  • Drives
    Silverado LT All-Star edition
  1. The actuators have plastic gears inside which tend to wear and eventually strip. That's why it's intermittent. Sometimes they slip sometimes not. You will need to replace it eventually. Better now than later in 90+ temps.
  2. Most likely this: https://www.amazon.com/Air-Door-Actuator-2003-2014-Chevrolet/dp/B073ZWLF2S/ref=sr_1_4?s=automotive&ie=UTF8&qid=1529682894&sr=1-4&keywords=HVAC+Air+Door+Actuator+2004+avalanche I had one go out in my Impala. Same symptoms. Was a pig to get to but probably easier in your truck.
  3. driver info center and stereo

    As per the hidden features thread... If you swipe left on the main radio screen, it switches the DIC to audio.
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