This remote is for Acadia Rear Seat Entertainment TV System only. Will only work with GM # 84352474 SYSTEM which is not included. This listing is only for the remote for the system mentioned. This particular rear seat entertainment is built in different model cars so I will do my best to mention a few of them.
2018 2019 2020 2021 Chevrolet Traverse
2018 2019 2020 2021 Buick Enclave
2020 2021 2022 Cadilac XT5
2021 2022 Cadilac XT6
2021 2022 2023 Chevrolet Traverse
2022 2023 GMC Acadia
Based on web search - this will work with 2019 - 2020 Chevrolet Blazer L, LT, Premier, RS