2003 and the few years beyond saw TRG continue to compete in ALMS and Grand American. In 2005, TRG was selected by GM as a factory team. Pontiac Motorsports and TRG teamed up to race the new generation of Pontiac GTO vehicles, specifically twin GTO.R's. GM brought in Paul Edwards and Jan Magnussen to drive the No. 64, while TRG hired Marc Bunting and Andy Lally to drive of the No. 65. In 2006, Kelly Collins replaced Magnussen, the same year Pontiac won the manufacturer's championship, TRG took 1st and 3rd in the team championship, and drivers Bunting and Lally took won the driver's championship.