that 2019 truck has to be a "Legacy" version 5.3 truck... the old 2018 body style.. and no e-Assist and no Auto Stop/Start on it... then yes, it would be supported...
BUT... if it is the new 2019 body style... and/or if it has e-Assist or the Auto Stop/Start crap on it, then no, it is not supported at all and can't do anything for it...