During the 2005 season, teams started to abandon the chassis (in favor of the Dallara) as it became increasingly unstable in traffic at Indy. By 2006, Rahal Letterman Racing was the only team fielding the chassis full-time. The lack of use in turn caused Élan/Panoz to cease development and support. Focus shifted to their DP01 program in Champ Car, further rendering the GF09 uncompetitive. A Panoz G-Force last competed in an IndyCar race in 2007 with Playa Del Racing's two entries and Chastain Motorsports' single car. American Dream Motorsports entered a Panoz in the 2008 Indy 500 for Phil Giebler, but he crashed in practice. In December 2008, Panoz announced the discontinuation of their IndyCar Series program due to Panoz's concentration on sports car racing in 2008 beyond and also several IndyCar Series teams opting for Dallara IR5 chassis.