Billed as a new entry-level car for Pontiac, the 2007 G5 coupe is essentially a rebadged Chevrolet Cobalt, albeit one with a few visual tweaks and content adjustments. Currently, there are two models that tie for the title of least expensive model in the Pontiac lineup – the base four-cylinder G6 sedan and the base Vibe, which each sell for $16,990.