NHTSA Complaint #11468106 — 2017 CHEVROLET TAHOE

On 5/5/2022, I was driving my 2017 Chevrolet Tahoe. I pulled into traffic and then traffic briefly stopped moving. When I attempted to accelerate, my truck would not move. When I tried to accelerate, my truck began to roll backwards into the traffic behind me. My truck would only move in reverse. A passerby left his vehicle to assist me with backing up off the road as much as I could due to there being a ditch next to where I was stranded. My husband attempted to back the truck out of the road completely but the truck then slid closer to the drainage ditch. Roadside assistance had to be called and my truck had to be winched out and towed to my home on a flatbed. There were no warning signs prior to this incident. There were no warning lamps, no messages, no unusual smells or sounds nor did it drive differently. The closest GM dealership was unable to assess my truck due to them being backlogged and not having any available appointments. The truck was taken to two separate mechanics that stated that I need a new transmission. One was able to do a diagnostic and stated that the code for speed sensor failure read after the 2nd attempt. When the truck was taken there for repair the speed sensor did not read but instead the main control valve body was the fault code. The repair was completed and two days later the truck would not shift between gears. I had to take my truck to another GM dealer 30 minutes away. They diagnosed my truck and stated that fault code for an irregularity in shift solenoid B showed and that there was metal shavings in the transmission fluid. I also have Onstar diagnostic checks that reported no transmission issues on 04/14/22 and 05/16/22 that there were no transmission issues as well. Now Gm is refusing to address my issues because of the mileage being over the warranty. I could have been seriously injured because my vehicle stopped in traffic with absolutely no warning signs.