2025 Gmc Acadia Mpg Comparison Chart. All trim levels of the 2025 acadia get 21 mpg, with 19 mpg in the city and 24 mpg on the highway. Looking over the numbers, we find that 2025 acadia fwd units split the difference between the two 2023 acadia fwd powertrains with a 23 combined mpg rating.
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