DETROIT – Mark Mathews will replace Jeffrey S. Heichel as director of GM's used-vehicle activities. Mathews came from GM Holding and has a finance background. Heichel was appointed finance director, IS&S, replacing Chris Meyer, effective Feb. 1, 2007. In this role, Heichel will report to Nick Cyprus, corporate controller and chief accounting officer, and Ralph Szygenda, group vice president and chief information officer. Meyer will assist Heichel on an interim basis as he transitions into the new role. Meyer’s new appointment in conjunction with other pending moves will be announced at a later date.