CalsGTP· Varsity Squad
I have an 06 G6 GTP coupe w/ 3.9L 6 speed manual trans with over 80,000 miles on it that I bought brand new. The only problem I have had other then brakes, tires, and fluid changes was an O2 sensor's heating circuit went bad (could happen to any car, not just the GTP). I would go with the GTP, better suspension and performance. From what I have noticed from reading the forums the G6 with the most problems I believe would be the base model. GTP has better powersteering setup (hydrolic with electric power assist, not sure about GT but base just has electric power steering and there have been issues with this). Hope this helps you make your choice.