A vehicle tracker system for a vehicle including a data communications bus extending throughout the vehicle may include a multi-adaptor vehicle tracker controller including a position determining device, a wireless communications device, a controller data link interface, a download learning port, and a processor. The processor may communicate geolocation data via the wireless communications device. A data bus adaptor may adapt the tracker controller to communicate via the data communications bus and include an adaptor data link interface coupled to the controller data link interface. The data bus adaptor may be operable with a given set of proprietary remote function controller codes. The processor may be operable with different sets of proprietary remote function controller codes, and determine the given set of proprietary codes based upon the download learning port and use the given set of proprietary codes for communications with the data bus adaptor.