my onstar green light is not on when pushing the blue onstare button it flashes green and you can hear it ring and you get the radio and dash indication connecting to onstat but will never connect looking for any info wiring diagram trouble shooting info please advise looking for any info like whats in this system how it works location of parts

its a 2017 chevrolet silverado

I think you have to use the app on your smart phone,

Verifying: Is there an account set up for this unit?

How recently has it worked?