NHTSA Complaint #11458936 — 2019 GMC ACADIA

Vehicle has had a hard shift since 15000 miles, always told at dealership it was normal. At 87493 my check engine light came on and code P2097-00- I was told it was that I had a bad battery and GM would not provide me one. Light was reset. Now at 98000 miles, shifting harder (automatic) like a jolt and vibrates going up hill- told I needed transmission fluid changed, this did nothing. This was confirmed by dealership prior to fluid change and then the dealership would not set up another appointment. Had this confirmed also by an independent service center. Occasionally a light will come on to say shift into park, despite being in park. No other messages related to this.