Table 1 shows one common service brakes related problems of the 2023 GMC Canyon.
| Problem Category | Number of Problems |
|---|---|
| Service Brakes problems |
While driving at 70–75 mph on an interstate, my vehicle suddenly displayed a “brake failure” warning and limited speed to 62 mph. Power steering failed completely, and braking became ineffective despite hard pedal pressure. Multiple warnings followed: abs, engine, and others. I was in heavy traffic with vehicles at full speed. Loss of braking and steering control forced me to coast across lanes to the shoulder, narrowly avoiding collision. My safety and that of others was at extreme risk. After stopping, I turned the vehicle off for ~30 seconds. Upon restart, all systems returned to normal—no warnings or issues. This indicates a transient software malfunction, not mechanical failure. No prior warnings or symptoms occurred. The problem has not been reproduced or confirmed by a dealer/service center. I have not scanned or inspected the vehicle. It has not been examined by the manufacturer, police, or insurance. The vehicle is in my possession and available for inspection upon request.
The contact owns a 2023 GMC Canyon. The contact stated while driving 20 mph, the vehicle came to an abrupt stop without warning. The contact waited for several minutes before resuming normal driving. The contact stated that the failure was caused by the rear brakes. The vehicle was not diagnosed or repaired. The manufacturer nor the dealer was notified of the failure. The failure mileage was 14,129.
Since I purchased the vehicle it’s had the issue of it braking on its own. I brought this up to GMC many times. At the beginning they had me try to duplicate it with them, which I thought would be unsafe. They only acknowledged the problem and attempted repairs after I contacted GMC directly. The issue with the crash alerts while driving always stayed, even though there was nothing in front of me. Just recently it started braking on its own again in traffic. This has caused bodily and property damage, luckily nothing grave. I do not feel safe in the vehicle and gave GMC many attempts at fixing such a serious issue. I want them to tow replace the vehicle and provide a loaner. Please contact me if you need more details. [xxx] [xxx] information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).
The contact owns a 2023 GMC Canyon. The contact stated that when applying the brake pedal, the steering wheel would begin shaking. The computer on the center council that displays information, had blacked out. The vehicle was taken to the dealer who diagnosed that the brake pads had failed. The dealer had completed a software update for the main computer however the failure persisted. The vehicle was not repaired due to the brake pads (part number 87850375) not being in production for repairs. The failure had become more persistent and now the brakes have failed. The dealer was contacted and confirmed that the part for the repair was unavailable even for purchase. The parts were on national backorder. The vehicle had not been repaired. The manufacturer was made aware of the failure by the dealer and the manufacturer confirmed that the part was unavailable. The failure mileage was unknown.
Automatic breaking system. Driving along at 25-30 mph on a snow covered road when all of a sudden alert system sounded and vehicle brakes abruptly applied putting vehicle into an uncontrollable slide. Fortunately there was no one behind and nom on coming traffic. Notified gm customer service, as I have a case open for other issues they claim tyhey do not have a fix for. Gm's response to the sudden brake application was "OH I'm sorry".
Vehicle only two months old with 2000 miles. Service engine light and brake assist service light activated. GMC dealer states brake master cyclinder failure and vehicle should not be driven. Vehicle left at dealer while awaiting replacement master cyclinder. Unknown if this is a widespread problem causing brake failures in GMC and chevy new model Canyons and colorados.
During normal operations the truck will come to a complete stop. I turned off the abs and it still happens. It caused a major incident today while I was driving 50mph and it brought me to an abrupt stop on the highway. It’s happened many times but today the driver behind me avoided my truck by an inch. I was then followed y that driver for half a mile when I immediately exited the highway.
Emergency collison fault problem on the 2023 GMC Canyon failure date: 10/22/2023 driving approximately 45mph while car in front is approximately 50 yards ahead driving at a matched speed as my vehicle and without any prior warning the forward collision alert activated flashing red light on windshield and automatically applying full braking until the truck came to a complete abrupt stop in the center lane of rush hour traffic causing other drivers behind to swerve narrowly avoiding serious accident. I manually DE-activated the automatic braking but kept forward alert on until the truck could be brought to the dealership for diagnosis. Forward alert went off erroneously multiple times the following days without any rhyme or reason. Not until the final day before the scheduled service appointment did the system DE activate itself indicating an issue with the forward collision. Dealer now has vehicle in their possession and confirmed a fault issue. They are working with gm on a solution, but no luck yet.
Driving approximately 45mph while car in front is approximately 50 yards ahead driving at a matched speed as my vehicle and without any prior warning the forward collision alert activated flashing red light on windshield and automatically applying full braking until the truck came to a complete abrupt stop in the center lane of rush hour traffic causing other drivers behind to swerve narrowly avoiding serious accident. Had the cars been following closer or an 18 wheeler been behind me during this incident, the outcome could have been much worse. I manually DE-activated the automatic braking but kept forward alert on until the truck could be brought to the dealership for diagnosis. Forward alert went off erroneously multiple times the following days without any rhyme or reason. Not until the final day before the scheduled service appointment did the system DE activate itself indicating an issue with the forward collision. Most issues occurred while it was either raining or damp outside. Dealer now has vehicle in their possession and confirmed a faulty component that is on backorder with no date. Truck has had multiple other electrical issues since purchase 3 months ago. ~200 miles dealer replaced faulty hvac module. ~4500 miles forward collision alert as described above. Since day one there have also been issues with trailering harness intermittently not working causing trailer brakes to not function while towing. (yet to be diagnosed by dealer) lastly left turn signal would stick causing turn signal to stay on until manual deactivation. Dealer confirmed faulty turn signal and is in the process of replacing while it is in for service.
The contact owns a 2023 GMC Canyon. The contact stated that the vehicle had experienced several electrical failures and the vehicle would not start due to a faulty battery which had lost power. After the manufactures over the air electrical update was performed the vehicle began to experience several additional safety malfunctions which included the backup camera, door locks, brakes and power steering. The contact indicated that while driving approximately 5 mph the warning messages "power brake assist" and "power steering" had displayed and when pressing the brake pedal the pedal extended to the floor and the vehicle would not immediately stop. Also, the steering wheel became stiffer to turn. The vehicle was later taken to the local dealer who indicated that the vehicle had experienced unknown electrical failures but no solutions were available. The manufacturer was also notified of the failures but no assistance was offered. The failure mileage was 2,500.