When I learned that Will Arnett was the voice in those GMC commercials, I was shocked, mostly because I envision him as that fun, goofy guy from Arrested Development. Who knew he had such a serious voice? I learned this information during Arnett’s appearance on Howard Stern to promote his new pilot with Keri Russell, Running Wilde. The creator, Mitch Hurwitz, also created Arrested Development. Though I have my fingers crossed for Arnett’s new show, at least he has the ongoing voice-over work, which is the most coveted “get” in Hollywood. The commercials take very little man-hours to record, and Arnett gets paid every time it airs. Watch the commercial below, and wait until the end to hear Arnett’s hot-and sexy voice.