I think you have to sign up with the internet my chevrolet first to start your free basic 5 yr plan then download the app , when you get to the site on your computer have your Vin number for your truck it has a lot of useful Info for your truck, I mean it has your build of your specific truck which is cool,
Go to the play store on your phone and download "my chevrolet " App ,or search my chevrolet app also on apple or Iphone I forgot what was required but works great ,