We got in a 2020 Silverado that was a theft recovery and the key has to be in the key pocket to start truck. Tried new keys and have replaced antenna behind radio but no change. The only code I am getting is a telematics module misconfig. Is the gm software able to check antennas, I think there is 3 on it. Thanks Michael

Yep, the GM software is able to check the antennas.

So I would just need a pass through device and tech connect?

GM software is able to check the antennas.

Did it come with these problems or has this occurred after these issues started?

We have only had the truck 2 weeks and it came with this problem. Does the telematics module have any thing to do with that part of the system?

Probably not. This seems like the kind of issue that will require a skilled locksmith or a dealer technician to diagnose.