Don’t know if it will help but there is an entire section on this forum on installing Keyless N Go to a truck without it. Search “How to: install keyless and go”. It’s from 2019 by member Jimmy007. Start with post #3. I have a 2018 Bighorn which I installed the keyless and go system on following the write up on this forum. It’s been working perfectly since late 2019. The write up gives good pinouts for connections, wiring, antenna locations and where to source connectors along with AlfaOBD activation.