For the C1114 I would check the truck connection on the 7-way. It is possible for there to be a bit of corrosion that is causing the voltage to arc to a ground source. Some Dielectric Grease # 11755 on your electrical connectors may help to fix the issue.
You should also reach out to your local Chevrolet dealer as there may be a software update available on your 2019 Chevrolet Silverado 5500 for this issue. view full answer...