I have 2016 express 2500 the receiver is in the van and snap on tool says there are two remotes programed in the system but can not program in any remotes van did not come with ATG option any thoughts on this maybe bcm needs reprogramed on turned on any help would be great.

 

Welcome to the forum here is a link on a thread already started about what you are asking.
might get more traffic if you post a question there so as everyone that has
subscribed to that thread will see your question,.

https://chevroletforum.com/forum/exp...47/#post349566