NHTSA Complaint #11640814 — 2022 GMC ACADIA

12/13/2024: While pulling onto the highway, the vehicle suddenly not accelerate past about 18 mph and would not shift gears, only rev the engine louder. Once button was pressed to engage shifting gears manually, the gear number was not shown on the dash as usual, only the letter L. We were able to drive slowly to the next exit ramp to get safely off the road. Notification about engine/transmission popped up on dash and on myGMC app. On star emailed report. Vehicle was towed to local GM dealer and assessed. Have been told that transmission needs completely rebuilt, but no description of actual issue. As of today, 2/5/2025, still waiting on parts to complete transmission rebuild.