4wd serv and wont shift out of 4 low

[Granite Crystal 1500]

So the three year old battery died on my 2022 big horn. Parked the truck in the drive and then attempted to start it the next morning. I pushed the start button and the dash light up like a Christmas tree. 4wd serv, 4wd low & 4wd high constantly flash. Starter did not work. I replaced the battery and it started. 30 seconds later the dash lit up again. Tried all the simple tricks like disconnecting the battery all night and still the same result. Took it for a drive and it will not shift out of 4 low. Checked all the connections I thought would be involved. Still no change. has anyone else had a similar issue?

 

[HSKR R/T]

So the three year old battery died on my 2022 big horn. Parked the truck in the drive and then attempted to start it the next morning. I pushed the start button and the dash light up like a Christmas tree. 4wd serv, 4wd low & 4wd high constantly flash. Starter did not work. I replaced the battery and it started. 30 seconds later the dash lit up again. Tried all the simple tricks like disconnecting the battery all night and still the same result. Took it for a drive and it will not shift out of 4 low. Checked all the connections I thought would be involved. Still no change. has anyone else had a similar issue?

Need to get a scan tool on it and see what codes it's throwing. Something seems like it might be fried. Could also let it sit overnight with battery hooked up . Maybe just needs time.

But I'd definitely be trying to scan for codes

 

[Granite Crystal 1500]

Thanks for the scan tool advice. That was my next attempt. I will see what the codes are and go from there.

 

[Snekpete]

Lighting up like a Christmas tree is potentially the CAN-C Star connector failure. There are a bunch of threads on this. Search on "star connector" and/or "Bus Issue".