Yes. At 2055 miles my brakes failed completely. We tow a travel trailer and thankfully we were not attached at the time. I managed to coast to a safe stop. We had to wait over 3 weeks before a new master cylinder arrived. The tech was confused because there were multiple part numbers for the master cylinder suggesting the manufacturer is tinkering with the design. You're not alone. Use the BING search engine and type "2019 Silverado BPPS master cylinder" and you will see the problem is wide spread. I contacted the NHTSA and submitted a report of the failure. They acknowledged other complaints and are considering an ODI (Operational Defect Investigation). You should do the same. It only takes a few minutes.