2015 GMC Acadia

The contact owns a 2015 GMC Acadia. The contact stated that while driving at various speeds, the vehicle was shuddering and vibrating while shifting gear, and vehicle failed to properly accelerate. The vehicle was taken to the local dealer who diagnosed that the transmission was faulty and needed to be replaced. The transmission was replaced, and vehicle was repaired. The manufacturer was not notified of the failure. The failure mileage was 90,000. The VIN was not available.

Check engine light is on. Shudder and delayed reaction after engaging the gas pedal when moving forward in gear 1 & 2 then again seems to intermittently has issue with higher gears when on the hwy. Without warning, Several times the Acadia would not engage gears and wouldn't move at all after backing into the street from driveway. I had to have someone help push the Acadia back into the driveway. The Check Engine light keeps turning on and off. Had O'Riely check th OBD with code reader. "Torque Converter Selenoid is stuck 'ON'. Was informed by Costco there was n 2020 Recall for Acadia"s of my year regarding a Transmission recall Ref #N202313440.

I have taken the vehicle to be repaired 5 times already and GM still refuses to acknowledge the full extent of the issue. My transmission was repaired under 100k miles while under warranty coverage for a slipping 3rd gear, excessive shudder, and hesitation. After a 3 attempts for repair, the 4th involved keeping the vehicle for a number of weeks and replacing internal transmission parts. Within 2 months, the symptoms returned but was out of warranty. The service center refused to diagnose it further without a $1,500 "diagnostics fee". I have brought the vehicle multiple times to the dealership, and have contacted GM seeking assistance on the matter. While the dealership service centers continue to focus on other parts and/or smaller sub-components of the transmission, my vehicle remains UNSAFE to drive outside of my immediate locality. I suffer from stalling, failure to maintain speeds, I cannot pass vehicles, I cannot maintain or obtain highway speeds to keep up with traffic. I have taken it yet again for repair, where the service center refuses to acknowledge the problem. They blamed it on a sensor and sent me on my way, but not only 30 minutes later did the symptoms return full-force. The Check Engine Light has reappeared. Prior to the visit earlier today, it was recently tripped at P0796, Pressure Control Solenoid C stuck or closed. I was on the highway today with avg traffic going 75 MPH. I was unable to merge into traffic and almost got pushed off of the road as a result. The truck also slipped when travelling inclined over the walt whitman bridge in to Philadelphia. It resulted in a bridge closure for 45 minutes while I could get towed off of the bridge. Once i got to the service center, as always, but will not drive over 45 MPH unless its up to 4600 RPM, steadily. This has got to end. Please Help.