The contact owns a 2018 Chevrolet Silverado 1500. The contact stated while driving at an undisclosed speed, the brake pedal was firm while depressed, and the vehicle failed to respond immediately. The "Service Brake Assist" message was displayed. The contact firmly depressed the brake pedal, and the vehicle was able to stop. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was made aware of the failure and advised the contact to file a complaint with the NHTSA Hotline. The failure mileage was approximately 139,270.

- Newark, DE, USA

The contact owns a 2018 Chevrolet Silverado 1500. The contact stated that while driving at an undisclosed speed and attempting to slow the vehicle, the brake pedal briefly became stiff, after which the brake pedal depressed all the way to the floorboard. The contact stated that the vehicle was able to stop but required increased effort. No warning lights were illuminated. The vehicle was not taken to the dealer or an independent mechanic. The vehicle was not repaired. After investigating the failure, the contact related the failure to NHTSA Campaign Number: 20V603000 (Service Brakes, Hydraulic), but the VIN was not included. The manufacturer was notified of the failure but provided no assistance. The failure mileage was 161,000.

- Monroe, GA, USA

The contact owns a 2018 Chevrolet Silverado 1500. The contact stated while attempting to stop the vehicle, the brake pedal extended to the floorboard, extending the stopping distance. The vehicle was taken to the local dealer who diagnosed that the vacuum pump was faulty and needed to be replaced. The vehicle was not yet repaired. The manufacturer was notified of the failure and informed the contact that the VIN was not included in NHTSA Campaign Number: 20V603000 (Service Brakes, Hydraulic). The contact stated that the vehicle had experienced the failure listed in the recall. The failure mileage was 30,000.

- Colonia, NJ, USA

The contact owns a 2018 Chevrolet Silverado 1500. The contact stated that while driving at an undisclosed speed, the vehicle experienced unintended braking. Additionally, the steering wheel was shaking while driving. There was no warning light illuminated. The dealer was not notified of the failure. The vehicle was not diagnosed nor repaired. The manufacturer was made aware of the failure and advised the contact to file a complaint with the NHTSA Hotline. The contact related the failure to NHTSA Campaign Number: 19V761000 (Service Brakes, Hydraulic, Service Brakes, Electronic Stability Control) however, the VIN was not included in the recall. The failure mileage was approximately 35,000.

- Raymore, MO, USA

The contact owns a 2018 Chevrolet Silverado 1500. The contact stated that while driving approximately 2 -?" 15 MPH, the vehicle shut off while depressing the brake pedal. The contact stated that the -??Check Brake Monitoring Alert System-?? was displayed. The cause of the failure was not yet determined. The local dealer and manufacturer were notified of the failure and the contact was informed that the vehicle was not included in NHTSA Campaign Number: 20V603000 (Service Brakes, Hydraulic). The contact stated that the vehicle experienced the failure listed in the recall. The approximate failure mileage was 74,000. Vin is invalid.

- Wewahitchka, FL, USA

The contact owns a 2018 Chevrolet Silverado 1500. The contact stated while driving at an undisclosed speed, the service brake assist message was displayed, and the brakes were slow to engage. The vehicle was taken to the dealer and diagnosed that the brake booster pump had failed and needed to be replaced. The vehicle was not repaired and remained at the dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 60,000.

- Union, MO, USA