GM Volt Forum banner

navigation upgrade

  1. Botched Nav Radio Upgrade By Dealer OnStar RED!

    Generation 1 Volt (2011-2015)
    Long story short -- does anyone know the exact proper procedure and codes to upgrade the OnStar module when upgrading from the old Gen 1 base stereo to the Navigation head unit? Apparently the procedure on here is missing something. (Also one of the needed cable parts has been discontinued...
Top