NHTSA Complaint #11508285 — 2017 CHEVROLET TAHOE

January 23, 2023 - mileage (85K) 2017 Chevy Tahoe, Z71 What: Transmission/Drive Train 6L80 Hydromatic Transmission - Complete Failure Vehicle was idling in park, in a parking lot, as it was put into drive there was a loud clunk, then pressing the accelerator the vehicle would not move. Put the vehicle back in park, then reverse, this time the transmission engaged backwards, shifted to drive, it moved normally pulled out into traffic. Safety was put at risk when pulling into traffic and then being in the traffic and suddenly, pressing the accelerator the car was no longer moving forward, with other vehicles coming in the rear. Immediately I put on the flashers, bringing the vehicle to a complete stop in traffic in the middle of the lane as the vehicle would not move at all. This put me in danger of being rear-ended by the vehicle(s) behind me. Additionally, safety could have been at all times depending on situation and location. Managed to limp the vehicle home, where it sat overnight to drive to the dealership for diagnosis. No issues going from cold start to drive to travel 4 miles to the dealership, Mark Wahlberg Chevy. Dealership Service Diagnosis, complete transmission failure, likely torque converter issue (known problem), entire transmission was replaced with remanufactured. Warranty, just expired December 2022. Removing transmission, damaged muffler, had to be replaced. Reported to the GM manufacturer for assistance to replace transmission as the warranty just expired in December of 2022. GM Case number 9-xxxxxx filed on January 26, 2023. GM as far as I know did not come and see the vehicle. The old transmission is still at the dealership, I intend to take possession of it. There was no previous notice that this even was going to occur, no lamps, signs, check engine light, symptoms no were there any error codes produced just prior to this event nor do I believe at the time the vehicle arrived at the dealership on January 26.