Buick Rainier was a mid-size SUV sold by the Buick division of General Motors. The Rainier was the first truck sold under the Buick marque and was the first body-on-frame V8-powered Buick since the 1996 Roadmaster. The Rainier was only available in a 5-passenger configuration, but was one of four GMT360 SUVs to offer V8 power in this configuration along with the GMC Envoy Denali, Saab 9-7X 5.3i, and Chevrolet TrailBlazer SS. Both rear and all-wheel drive models were offered. An upscale CXL trim added a better Bose stereo and XM Satellite Radio.

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