What We Know for Sure; Made-for-Oprah Pontiac G6 gets oomph.(News)

Byline: BOB GRITZINGER ** Pontiac has toyed with performance for years, while occasionally delivering on that promise. But General Motors' so-called excitement division may be onto something with its GXP line of sedans, the most recent of which is the G6 GXP concept shown at the Specialty Equipment Market Association show in Las Vegas. The G6 GXP concept is most likely the third production model in a sport-tuned family that debuted in showrooms earlier this year with the introduction of the 2004 Bonneville GXP. The performance Bonney has Cadillac's 4.6-liter Northstar V8 ...