For 2007,the G6 gets a major engine shuffle; the top-of-the-line GTP gets a new,more powerful V-6 engine and 6-speed automatic transmission,while last year's 3.9-liter GTP engine is now optional on the GT model. Side curtain air bags are now standard on all G6 coupes and sedans,while the GT models get a revised power steering system. The GTP version of the hard-top convertible is discontinued,leaving only the GT version for those that want to drive with the top down.
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