All driver assist functions failing

- Portland, OR, USA

My 2015 Chevrolet Tahoe with 90,000 miles needs a new camshaft and all 16 lifters need to be replaced. There was no forewarning about this huge problem. Literally, one day I was out in my car, and the accelerator suddenly stopped working for a while. Then, all of a sudden there was a hard jerk, and it sped up on its own. When I finally found a safe spot to pull over I went to push on the brakes and the entire car just started shaking. My poor children were terrified as this could-€™ve turned into a terrible accident for me and the other drivers around me. I immediately called my local mechanic and was told to bring it in immediately. On my way there the service indicator lamp came on. Upon inspection by my mechanic I was told I need a whole new engine. I have not had it repaired because I cannot afford to do so. I would be more than happy to allow someone to come and inspect it upon request. Apparently this is a huge problem with GM vehicles that GM is completely choosing to ignore.

- Yoakum, TX, USA

Check engine light came on after vehicle starting losing power in steering column. Speedometer was moving up and down with some other gauges doing the same simultaneously. The vehicle provided warning of stabilitrak after dismissed, it gave another warning stating, -€œSteering Assist is Reduced Drive with Care.-€ It became harder to accelerate and very distracting as the stabilitrak error continued to pop up with the speedometer and other gauges, such as RPM, going up and down continuously. These gauges would then stop working altogether then start to work briefly. Then, the gauges would continue to malfunction by going up and down with the stabilitrak error on screen. I got off the interstate and I have having issues with acceleration from first gear. Vehicle was hesitating which was terrifying. It was failing to engage. Transmission fluid rose from 187 to 208 degrees during a brief time period on the screen. Could not use the M gear at all.

- St Johns, FL, USA

The battery power saver light came on then as backing out of driveway I lost power and steering control Service brake assist light flashed as well as service stabilitrack and steering assist Returned home bc I had five kids in vehicle and couldn-€™t risk it. Consumer thought vehicle was repaired but occurred again.

- Abilene, TX, USA

At slow rate of speed, pulling into parking spot or in drive-thru lines, the brake pedal takes effort to push, ticking, clicking and grinding sound and the brake pedal begins to vibrate and very hard to push down to stop the vehicle. I see this has been recalled on other vehicles but not my particular Tahoe ltz VIN# this has been an ongoing issue since September 2019 after the car was purchased.

- Cleveland, TN, USA

I pulled into my driveway... the engine speed started increasing and simultaneously the brake pedal sunk into the floor and braking abilitywas lost. This happened about 4 feet from my garage door and this caused my truck into the garage door. I have a driveway video of me on the phone and then the car being accelerated through the garage door.

- Orange Park, FL, USA

The contact owned a 2015 Chevrolet Tahoe. When the vehicle was shifted into drive, it independently accelerated. The vehicle sped from the contact's driveway into the front neighbor's yard before crashing into the neighbor's air conditioning unit. After the crash, the vehicle spun around until the passenger tire partially separated from the wheel well. In addition, the brakes failed at the time of the incident. There were deep skid marks visible on the neighbor's yard. The contact was transported from the scene via ambulance. The contact was treated for unknown injuries that required immediate medical attention. A police report was filed. The manufacturer was not made aware of the failure. The vehicle was destroyed. The failure mileage was 50. MA 10/14

- Ft Washingtion, MD, USA

The forward collision alert system just doesn't work. I cannot make it produce a collision alert no matter what I do. For example it is advertised to provide a heads up visual warning as well as an audial warning if I approach the car in front of me to rapidly. It does not the system also a green automobile icon when you are following closer than about 200 feet to the vehicle in front of you. The green icon is advertised to turn yellow if you follow too close. It does not. The only time that I have ever seen the red heads up display is when it is a false alert. All and all, this system which was touted to be a great safety feature is totally worthless.

- Midland, GA, USA

Upon purchase of a new 2015 Tahoe I observed the possibility of a problem with the forward collision alert system (fca). I reported this to the service manager at Chevrolet. On 9 April 2015 the service manager, assistant service manager, master technician, and I took the vehicle for a test drive. While driving the vehicle at moderate highway speeds I demonstrated the various phases and operation of vehicle detection. The fca has plenty of sensitivity and detects vehicles in excess of the specified distance in the owner's manual which is not an issue. At a moderate closing rate between vehicles the instrument cluster icon changes from green to amber-orange which appears nominal. However, the red alarm heads-up windshield display, rapid high-pitched beeps and red icon are never activated until a closing distance about ~3 feet before a collision. There is virtually zero reaction time for a driver to brake the vehicle at less than one car length before going to red. In addition, the system is supposed to disengage the adaptive cruise control (acc). Considering time, rate, and distance this is ineffective as the mass and kinetic energy also needs to fully disengage before a potential collision. Because of the danger of creating a traffic incident the vehicle was not tested to the level of a full collision. I was informed by the service manager that there are no service bulletins, adjustments, or software patches that may correct this deficiency by the dealer. GM stated that the system works as designed and delivered. The GM forward collision alarm (fca) delivered product appears to have a design deficiency and is an operational safety hazard waiting to happen. If the fca does not function properly then why introduce it to a consumer regardless of GM owner manual warnings about trusting alert systems.

- Goleta, CA, USA