Freshened styling and more available power marked the 2004 revamp of Pontiac's midsize car. Grand Prix continued as a five-passenger 4-dr sedan with front-wheel drive and V6 power. Wheelbase was unchanged, but the new body was slightly longer. Rear leg room increased about a half inch, rear head room shrunk about the same. The lineup consisted of base GT1, better-equipped GT2, and top-line GTP models, the last highlighted by a new Competition Group performance option. GTs continued with a 200-hp V6. GTPs got a supercharged version with 260 hp, up 20 hp from last year. A 4-speed automatic remained the sole transmission, though the GTP's Comp G package featured Pontiac's new TAPshift that allows manual-shift control via paddles on the steering wheel. It also included a performance-tuned suspension and antiskid system. All models had 4-wheel disc brakes. ABS and traction control were optional on GT1, standard on other models. Interior revisions included new materials and a new dashboard. Curtain side airbags were optional on GT2 and GTP, unavailable on GT1. Front side airbags were not offered. OnStar assistance, head-up instrument display, and satellite radio were available.