The 2018 GMC Acadia is a mid-size crossover SUV manufactured by General Motors under its GMC brand. While the Acadia nameplate had been around since 2007 the 2018 model marked the beginning of the Acadia's second generation. 1. First generation (2007-2016): debuted in 2007 as a full-size crossover SUV offering seating for up to eight passengers. It was built on the GM Lambda platform which it shared with other GM vehicles like the Chevrolet Traverse and Buick Enclave. 2. Redesign for 2017: it underwent a significant redesign for the 2017 model year. It transitioned from a full-size to a mid-size crossover SUV resulting in a smaller and lighter vehicle. The redesign aimed to improve fuel efficiency and maneuverability while maintaining versatility and comfort. The 2017 Acadia also introduced new technology and safety features. 3. 2018 model year: this model continued the second generation that began with the 2017 redesign. It carried over many of the features introduced the previous year. However GMC made some minor adjustments and updates based on customer feedback and market trends. It remained available in several trim levels including SL SLE SLT and Denali offering a range of options from basic to luxury. 4. Features and technology: it offered various features and technology options such as a touchscreen infotainment system with smartphone integration available Wi-Fi hotspot advanced safety features like forward collision warning heated and ventilated seats and a dual-pane sunroof. 5. Engine options: it offered a standard 2.5-liter 4-cylinder engine producing around 193 horsepower and a 3.6-liter V6 producing approx. 310 horsepower. 6. Reception: this model received generally positive reviews from critics and consumers. It was praised for its comfortable ride & upscale interior. However some reviewers noted that the smaller size compared to the previous gen resulted in slightly less cargo space and third-row legroom.