Does GPS Navigator send data to satellite?
Is this true about regular devises available in the market?
GPS receivers do not transmit any information they are built for receiving information. The encompassing device then uses said information depending on what the device was built for.
You would be hard pressed to find a 'regular device' on the market which transmits data back to 'the satellites'. 'Talking' to 'the satellites' is not a necessary part of GPS functionality.
As was mentioned in the comments, the devices in question can relay information that has been captured if there is a method to do so on board. For example, smartphones and other tablets have the ability to communicate over 3/4G and WiFi. In most instances, however, you must authorize the device to send this information due to privacy laws.