Hi all,
I recently bought a 2008 Chevy Express van and have an issue with the the reverse light as well as reverse horn/alarm.
It seems especially when cold (East Coast) the car will go in reverse but the horn and reverse lights will not turn on. It often turns on shortly or fully after I am driving for a while and go in reverse.
However when I then turn my ignition key off after driving my reverse horn/alarm will turn on and stay on until I turn the automatic-light switch to off and it all goes dark and quiet.

Any idea where that could be coming from.