Trailer light issue

[john cahill]

I have a 2021 chevy 2500, the dealer just did an update on the radio not sure if that has anything to do with the problem . I went on a trip with a trailer and now that the trailer is not plugged in the dash shows that the trailer right and left turn signal lights are not working, it seems that it thinks the trailer is still plugged in. Also my turn signals are flashing faster than normal. I have checked all the bulbs on the vehicle and they are working, there is nothing in the 7 wire connector and there is no corrosion. Any help would be helpful.