After almost 40 years of toting the GM logo around, Mr. Goodwrench is retiring. Or being laid off, depending on your perspective. Either way, the troubled auto company is replacing him next year with separate "certified service" concepts for Chevrolet, Buick, GMC and Cadillac. GM has decided to focus on its remaining nameplates because a) they're all strong national brands, and b) GM's name is mud after the bankruptcy hearings and legacy of administrative incompetence. Plus, as David Kiley points out: "There isn't actually a lot of grease and wrench-work going on with new cars today. If something goes wrong on a vehicle, it usually requires fixes to the on-board computer. 'Goodwrench' doesn't quite reflect the technical sophistication of today's vehicles. Maybe 'Mr. Goodchip' would be more appropriate." I must admit, it's a little sad to see him go. Maybe Jay Leno will resurrect Mr. Badwrench in tribute. He's earned that much, I think.