Hey , have a 05 3500 Cummins. While driving the airbag light come on and off along with the brake and abs lights along with a chime. Was about 100 miles from home and kept driving. Got home all the dash lights and gauges were not working. Headlights stayed on and switch was turned off. Tried to pick it and doors will lock and unlock but the horn will not sound. Truck will turn over but will not start now. Batteries are good with 12.8 volts. What do I do next. Any help will be great. Thank you

 

Verify chassis ground wire is present from the battery.

 

My buddy had a similar issue recently and turned out the was a pcm update that cured issue but obviously has to be done at dealer