NHTSA Complaint #11686176 — 2017 CHEVROLET TRAVERSE

The component/system that is malfunctioning is coding P-0826. Dealership says replace Transmission.Based on my experience with the vehicle, the transmission is not the main issue. There are symptoms of an electrical issue that is causing the vehicle to lose power, rough shift, stutter and hard shift. This situation began when traveling back from GA to NC. After having stopped at a rest stop, I proceeded to get back on the highway and the vehicle hesitated to accelerate as I merged on to the highway. There were no warming lights, dashboard signaling or anything that happened prior to this to warm of this unsafe issue. With traffic behind me already at speeds of 70mph+, this situation could potentially have caused an accident in which I would have been unable to avoid because the car decelerated, hesitated and did not leave me with anyway to maneuver out of the lane. I fortunately was in the merge lane, which I had to constantly tap on the accelerator in order to get the vehicle to shift into the next gear and finally surpass 40 mph so that I could get back on the highway, potentially being able to maintain a safe speed. The vehicle then jolted after reaching 40mph and then after tapping the accelerator again, I was able to increase my speed. Upon returning to NC, I sought mechanical services from the dealership. They had last serviced the vehicle in October 2024, an oil change and put an additive in the engine. The dealership not only was not helpful, but they were unable to diagnose an issue because the vehicle had no check engine light or any dashboard warnings during the entirety of this issue. It was suggested that I get the spark plugs changed, since they considered it may be a misfire within the system. The spark plug change made it worse, eventually the car shook violently while at a red light and the dashboard lights came on and the car did not exceed 15mph. The car was serviced again and the coils were replaced. The problem still persists.