Pontiac replaced its best-selling Grand Am during the 2005 model year with the G6. It shared a basic front-wheel-drive design with the Chevrolet Malibu and the 9-3 from GM-owned Saab. G6 had a slightly longer wheelbase than Pontiac's other midsize car, the Grand Prix, but was 9.3 inches shorter in overall length. G6 offered base and sportier GT models. Both used the 200-hp V6 and 4-speed automatic transmission offered in Malibu. The GT added a manual shift gate and a firmer suspension. Both versions had 4-wheel disc brakes. The GT came with antilock brakes, traction control, and power-adjustable pedals, all of which were available for the base G6. Front side airbags and curtain side airbags were available as a single option. Leather upholstery and OnStar assistance were exclusive GT options. Satellite radio and remote starting were available on both models. So were a conventional sunroof or a "panoramic" power sunroof with a tilt-up front section and three rear-sliding panels that opened to near the full length of the passenger compartment.