School is back in session, but GM Design has been highlighting several projects from their interns. One of them is this eye-catching GMC Hummer HEV Peak concept, which was penned by Sun Hao and ...

A very special 2008 Hummer H3 SEMA concept is headed to the Mecum auction block. It’s a Hummer H3R, which is outlandish even by SEMA standards. It’s decked out in Hummer Racing branding, packs a 7.0L ...

If you’ve forgotten about the Hummer H3R concept, you’re not alone. However, the high-performance off-roader will be auctioned off at Mecum’s Indy Fall Special on October 5. So what makes the H3R so ...

General Motors today unveiled two concept cars linked to the company's hopes to rapidly develop cellulosic ethanol technology. The company revealed the Hummer HX and the Saab 9-4x BioPower concepts.