We rented a Liquid Silver Metallic G6 with a Sport Package including a 3.5-liter V6, handsome 17-inch alloy wheels, a lip spoiler, and fog lights. Our $20,920 car also had a roster of equipment including power windows, power door locks with remote keyless entry, power mirrors, and a power height adjuster for the driver’s seat. Air conditioning, cruise control, a CD player, and side curtain airbags rounded out the list of interior amenities, giving our G6 everything it needed and nothing it didn’t. Every G6 also comes with a five-year/100,000-mile powertrain warranty. We drove the car 600 miles in New England, round-trip from Boston to Cape Cod and the south-central coast of Maine.