Low speed brake assist failure in traffic.. Caused me to bump the person in front of me... Then a few days later I got the "service brake assist " on my dash.. Then my gmc app sent me a service soon warning... 2017 gmc sierra denali at 62500 miles.

- Hendersonville, TN, USA

Back up sensors not working. Truck also not having a vin number even though it was bought from the the Chevy dealership. Also was told the electrical system is not working properly

- Panama City Beach, FL, USA

I was pulling in to a parking spot and pressed the brakes and the truck didn-??t stop and I hit the sign. When I looked at the dash there was a -??service brake assist -?? warning on.

- Ridgeville, SC, USA

I am experiencing hard brake pedal and/or brake fade when attempting to apply the brakes. Their is a recall for this problem on other models, however my truck model year is not included for some reason. This has occurred on multiple occasions and has nearly caused an accident on those occasions. My truck also began to roll out of a parking spot and I had extremely hard brake pressure but no response from the brakes.

- Allen Park, MI, USA

My 2017 GMC Sierra is experiencing similar issues with excessive force required, vibration in brake pedal at low speeds, and delays in stopping as found on 2018 and up trucks and SUVs. I notified the dealership about a year ago about the issue and it potentially being linked to the recall and they said it wasn't and they would have to charge me to inspect and repair. The issue can obviously lead to an accident if the brakes continue to worsen and fail. Also abrupt stopping at low speeds doesn't work efficiently putting anyone who steps out in front of my vehicle or stops abruptly in front of me at risk. A couple of times there was a diagnostics alert sent to my email stating an "issue with the antilock braking system was detected". There are already accidents reported with 2018 and up vehicles because of this issue. I feel the recall for the 2018 and up vehicles needs to be extended to 2017 vehicles to prevent accidents.

- Fairland, IN, USA

When pressing the brakes a few time at a low speed Iose brake power. There is already a recall out for this model but not my vin. This is my recall issue Brake Assist Decreased Due to Vacuum Loss

- Camanche, IA, USA

I purchased my vehicle in January 2022. On 11/18/22 I captured a photo across my dash stating that the trailer brake system needed to be serviced (photo attached). This was the second time this message appeared within days. The vehicle continued to beep and flash for a long period of time clearing out my dash screen making it UNSAFE TO DRIVE. The beeping noise startled me, almost causing an accident on the freeway. I did not know what the warning meant as I wasn't towing a trailer. I wasn't towing anything and could not turn off the beeping sound or the flashing screen, in spite of hitting the dismiss button. I don't know why the message continued to go on and assuming there is an electrical shortage somewhere with the wiring. This needs to be recalled and fixed as it is a manufacturer issue. I do not have any aftermarket parts installed in this vehicle. This same alert message appeared again yesterday 12/5/22 as I was driving back from the airport. It continued for almost 2 hours while on the freeway and again I was not pulling or towing anything. I pulled over, checked my tailgate, turned off the vehicle and turned it back on and the message continued until I got home. It is very alarming and annoying and scared me. This is a big safety hazard and almost caused an accident again as the alert is very loud and flashes across, clearing out your screen, causing you to take your eyes off traffic looking ahead. This time, I was traveling in heavy traffic. Please investigate this further. Thank you

- Salida, CA, USA

The service message appeared on the display after backing up "SERVICE BRAKE ASSIST" I searched this issue and found over 65 complaints for this vehicle year/make /model. I am at work and fear driving home as this issue has resulted in brake failure on some of the complaints noted. I have not contacted anyone yet, I wanted a recall notice as this is a safety issue and we cannot afford any costly vehicle repairs.

- Wilbraham, MA, USA

Hi I purchased this used 2017 GMC Sierra Denali on October of 2021 it-??s been just only one year and while on the road with my trailer attached, I suddenly got a pop up on my display saying -??service trailer brake system -?? which caused me to be distracted with the chime and the warning being displayed repeatedly and overall left me with no power at all to my trailer brakes I would like to have this recalled and fixed at little to no cost due to the fact of the cheap and unsafe parts that are installed on these types of trucks by GMC

- Austin, TX, USA

The service trailer brake system keeps coming on. The notification constantly alerts and it-??s distracting my driving.

- Columbia , MS, USA

Trailer brake system error comes on. I dont even own a trailer or have ever towed a trailer. It cuts power momentarily and is very very unsafe. Please fix before someone gets hurt.

- Barrington, IL, USA

A Service "Trailer Brake System" message keeps coming up on my display constantly, over and over and over, I can't see the speed display, I can't hear the turn signal sound, it's extremally distracting and loud. When I looked this message up I found the wiring was faulty and my trailer brakes won't work.

- Garner, NC, USA

The trailer brake system on my vehicle suddenly stopped working. I was alerted by a continuous chime and message saying "Service Trailer Brake System." My brakes stopped working and made it difficult for me to stop my vehicle and loaded trailer. It was very frightening because I had lost all trailer braking function and feared I would not be able to stop my vehicle. In addition, the chime and message are non stop and very distracting and cause some components of my dashboard to be inaccessible making things more dangerous. Unfortunately, the distracting and frustrating chime and message continue even without a trailer attached.

- Blackshear, GA, USA

Loss of power assist at slow speed when backing or going forward. This has happened several times since I have had the vehicle. Brake pedal is very hard to press and vibrates.

- Centre, AL, USA

EBCM needs to be reprogrammed. Larry Stovesand GMC in Paducah, KY will NOT service my recall because it was closed on 2019, research has shown that this programming may need to be done again. After telling them this info. they are now saying that they will not service my recall because it has a salvaged title. After researching how a salvaged title is still honorable for a free recall service they are now telling me to take it somewhere else.

- Calvert City, KY, USA

The trailer brake System sensor keeps going off making the vehicle unbearable to drive. The transmission also jerks when it gets to 7 mph. I've taken the truck to the GMC dealer over 3 times to check the transmission problem and it still jerks. This has been a on going problem since the purchase of the vehicle.

- Mansfield, TX, USA

Driving on the highway going approximately 64mph and the traffic lane shifted over and everyone started to slow down and when I went to apply some brake. The pedal got very hard and became very hard to push down effecting my ability to brake properly. This almost caused me to get into an accident and I had to shoot over to the breakdown lane giving me enough time to slow down. My pedal became very hard to push down. This problem continued throughout my travel and service brake assist came on after the fact

- Lowell, MA, USA

The contact owns a 2017 GMC Sierra 1500. The contact stated while driving approximately 30 MPH, he heard an abnormal noise and while depressing on the brake pedal, the vehicle failed to decelerate. The contact stated no warning light was illuminated. The contact was able to cruise to the side of the roadway until the vehicle decelerated. The contact stated he shifted into reverse to stop the vehicle completely, before shifting into park. The vehicle was not drivable. The contact towed the vehicle to his residence. The contact stated he had an independent mechanic come to his residence and he was informed that the brake caliper and the front passenger-??s side brake pads needed to be replaced. The vehicle was not repaired but was pending repairs. The vehicle was not diagnosed or repaired. A dealer was not contacted. The manufacturer had been informed of the failure. The failure mileage was 53,579.

- Mecosta, MI, USA

while driving I get a repeating alarm chime and "Service Trailer Brake System" caution statement on dash panel. This alarm will go off as often as once every three seconds. It is both startling and a hazard to the driver and while towing condition of the trailer brakes is unknown.

- St Louis, MO, USA

Service trailer brakes light pops up and chimes over and over again. I've never pulled a trailer. It's distracting and will randomly go off. Seems to go off when gas is below 1/4 tank. Sometimes it goes months without happening. Sometimes it happens a few days in a row. The dealership says they can't do anything unless they see it go off.

- Anoka, MN, USA