The G6 has been updated with improved engines, the 3.5 and 3.9-liter, respectively, but they are still old engines. They are larger, updated versions of the 60-degree 2.8-liter V6 engine that was optional on the X-cars in 1980, 25 years ago. They are overhead-valve engines, low-tech to be sure, but they're relatively smooth and quiet and they get decent fuel economy, with an EPA City/Highway rating of 21/29 miles per gallon.
We did a number of 90-0 mph ABS panic stops with the car on a deserted country road, and it stopped straight and true every time with no fade. The brakes have a nice, progressive power application through the pedal. Next Page