Power Assist Brake Vacuum problems of the 2018 Chevrolet Silverado 1500

The contact owns a 2018 Chevrolet Silverado 1500. The contact stated that while approaching a stop sign, the contact depressed the brake pedal, but the brake pedal failed to function properly. The contact stated that extra effort was needed while depressing the brake pedal. There was no warning light illuminated. The contacted became aware of a failure with the vacuum pump which had caused the failure with the brake pedal. The dealer was not contacted. The vehicle was not repaired. The manufacturer was notified of the failure and instructed the contact to call nhsta hotline for assistance. The failure mileage was approximately 57,000.