Hi, Software for Holden and Ford AU are just available in AU or Mid-East version. According to record, it seems that your unit is from online seller, not a Au or Mid-East version. To add Holden software and Ford AU software, please contact with the local dealer. As to software for Chevrolet, please kindly note that there is no seperate software for Chevrolet. To test Chevrolet vehicles, please try GM software.