DETROIT: GM's Buick brand is debuting its first social media activity to promote the 2011 rollout of its Regal product among a younger, 30-something consumer.

Tweet to Drive is part of a larger integrated campaign supporting the launch. It is the latest effort to connect consumers with the car. Starting in the key market of Chicago, the effort asks consumers to Tweet an @reply to DriveBuickChi to request a personal test drive from any city location.

“We're not always in their purchase ...