CNET test drive: GM's plug-in hybrid SUV CNET Car Tech takes a drive in GM's experimental plug-in hybrid. by Wayne Cunningham @way4ne August 17, 2009 5:47 PM PDT Updated: August 18, 2009 10:11 AM PDT comments 0 facebook twitter linkedin googleplus more more + email tumblr stumble delicious reddit pinterest digg This content is rated TV-MA, and is for viewers 18 years or older. Are you of age? Yes No Sorry, you are not old enough to view this content. Play CNET News' Martin LaMonica takes a test drive in a plug-in hybrid SUV being developed by GM at GM's Milford Proving Ground in Milford, Michigan.