Bobnlee1

Code saying control module. My buddy who is a mechanic believes it's because of battery being switched out. Older vehicles you can switch out quickly new ones he says to unhook battery for a few hours and let everything reset. I will give it a go

Nope nothing. Truck running in neutral and push 4low nothing happens no messages. Goes to 4 h and 2wd but no go for 4l..had to change out the battery last month and after I did got a message to service parking brake and now this

My 2020 Sierra 3500 won't shift into 4wd low. Stopped in neutral still no go. Shifts into 4wd high and back to 2wd. Any info would be greatly appreciated

My 2020 Sierra 3500 won't shift into 4wd low. Stopped in neutral still no go. Shifts into 4wd high and back to 2wd. Any info would be greatly appreciated