 Initially, Pontiac did not plan on offering the G5 in the United States, however dealer pressure to fill the gap left by the discontinuation of the Sunfire caused Pontiac to introduce only the coupe variation into the U.S.The 4 door sedan was available in Canada as the Pursuit throughout the model run.The high-performance GXP trim was introduced in the Grand Prix line in 2005, adding GM's LS4 V8 engine that produced 303 horsepower and 323 lb.