Reprogramming key fobs and remote start?

I'm using a CAN system. I have a Launch analyzer. I've scanned the DDM, LGM, and BCM. There are no codes. I've actuated the door locks, hatch lock, wiper, and defrost with the scanner and everything works on the driver's door when pressed. I've taken the fobs to the parts store, and they were all putting out signals. I have an old code stored U1162 but nothing currently. The hatch light comes on when I open it manually, but it didn't with the scanner actuator.
Everything seemed to work manually and with the scanner and there weren't any codes. So, I don't think replacing the DDM would fix this but I'm not the expert.
I don't know what to do next.
I read about a valet button but couldn't find one under the driver's side panels.
I have one original Advital fob. And two more used ones. The code is exsdei474s on all of them.
I did read something about having a new key cut on Advital because the old key may be worn out.
Hopefully, someone has the answer.
Thanks

The truck visually looks like it's only 5 years old. I haven't had any water damage that I know of.
The code isn't current. It was in history. And I'm almost positive that it was only there because I unplugged the LGM when I started to look for cracked wires and corrosion on the plugs and fuses.
I rarely have to do anything to this truck other than maintenance.
This summer everything wore out at once. Replaced the Cat, alternator, battery, water temp sensor and thermostat, IAT, and Fuel filler tube I replaced just this summer. And after I replaced the fuel filler, the code I had for a small air leak, changed to a large air leak. I'm still chasing that problem, but I need to put a smoke tester on it. And my ABS pump motor isn't working. And now the key fobs to top it all off.
So, considering that the driver's door controls everything works manually and I was able to actuate everything in the DCM and LGM with the scanner and there aren't any current codes. Should I conclude that the wiring and modules themselves aren't the problem?
Could the remote car start be causing key fob programming problems?
My landlord put in a new garage door opener, and it seemed like my fobs stopped working the same week. Could that have anything to do with this?
Where is the remote car starter module, behind the glove box?
I'm not sure what they look like or if there's anything I could check for on that. Is there possibly a reset button on it?
Awaiting further thoughts and instructions. Thanks

I did finally find a remote starter button. You could only access it by opening the drivers door. And then you can see a small access panel on the side of the dashboard. After I found it I wasn't exactly sure what to do. I pushed the button to see if it would let me program the fobs then. I don't remember now exactly what I did but I did finally get one fob to program. But what happened was I was just sitting in the truck after failing multiple times after holding the two buttons when it suddenly cycled about 10-15 minutes later while I was just sitting there. I have no idea why it took so long to cycle or why I couldn't ever get it to repeat again for any of my other fobs. I was just happy to have 1 working.

Thanks for all your assistance.