GRM was one of the first teams to use the Holden VY Commodore for the 2003 season, with Tander driving the new model car. Whincup would drive an older model VX Commodore. Whincup was sacked at the end of the season and was replaced by Cameron McConville for 2004. McConville took the team's first round win in two years in controversial circumstances at Winton when he passed Rick Kelly on the second last corner of the race just after the end of a yellow flag zone. Tander left the team at the end of 2004 for what was then called Kmart Racing and was replaced by Andrew Jones. Jones was sacked before the end of the 2005 season and was replaced by Dean Canto for the end of 2005 and the 2006 season. Lee Holdsworth also joined the 2006, with McConville moving to Paul Weel Racing. The team scored one race win in 2006 with Canto winning the reverse grid race at Barbagallo after Team Kiwi Racing driver Paul Radisich spun off the track at the last corner.