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navigation firmware

  1. STS Forum 2005 through 2012
    As known by many owners of 2005-7 STS with Navigation (RPO YQ4) the clock fix firmware circa 2020 breaks Voice Recognition & various other functions depending on steering wheel button layout. This is the fix available on the web at https://tis2web.akamai.gm.com/radio/STS_GPS_MY_08_Fix.zip. It...
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