I have a 2008 G6 that I bought brand new from the dealership. It has 70,000 miles on it and warranty until 36,000. Had steering shaft replaced at some point since I bought it. Problems I have had were brakes/rotors, steering, noise (squeaking in the front end) I still have that noise, rear locks both broke ($600 to fix), misfiring cylinders (they cleaned the injectors and put some cleaner in, said I had sediment in my gas). Now for the steering problems. Steering wheel starting locking up and moving on its own left and right and vibrating. Moving when I was in park and sitting in the car. Making noises in the steering column, while its moving on its own. Would drive fine some of the time and then bam steering would go nuts and start moving and pulling left and right. Freaked me out, after that I held on tight to the steering wheel. After a week became so bad couldnt drive it safely. My husband thought it was rack and pinion. Not under warranty and dealer wanted $300 to replace part (not including labor). Brought it to a local garage and had the rack changed. No change. Had all the sensors recalibrated. No change. Called GM, told me there is a bulletin for electronic control module covered up to 100,000 miles. Decided to bring it back to the dealership. They said my mechanic was on the right track, but did not calibrate the sensors correctly in the torque sensor and steering shaft. They did it and charged me $95.00. Drove it home. About 15-20 miles after wheel starting turning on its own, making noises, pulling me all over the road and power steering came up on radio. Called GM again and complained. Drove it (had to pull over once it was so bad) back to dealership. Called them in the morning and they told me they drove it 4 times and it was fine. Told me my mechanic was a idiot and may have not put the rack in right. Refused to give me a loaner unless I paid because they lost money on giving me a loaner for my cylinder issue, and/or I could call Enterprise and get a rental from them with a credit card, that I dont have. Tried to explain to him the bulletin, didnt want to hear about it. Said they have to "diagnosis" it first. PS I thought they already did that. Told him about the Changed Park message I had on my radio. Said he never heard of that. I figured out how to fix it on here...thanks! This is on a Saturday, so he cant look at the car until Monday. They have had the car since Wednesday. Gen Manager wasnt in and his head mechanic had the day off. I pretty much hung up on him. He called my husband an hour later. Told him that he called his Gen Man on his day off and they had to offer me a loaner car because they have to stand by their diagnosis they charged me for. Also said they fixing some elses work and problem and we have cost the company over $300...not sure for what. I would have to be in by 12pm with a credit card (I dont have one), and they couldnt offer me a company loaner car. We tried to call another gm dealership so we could bring the car somewhere else, but since it is a Saturday we couldnt get a hold of anyone. So its still there...seriously I was going to leave it there. From posts on here I will call the BBB and file a complaint. This car was so unsafe to drive, the dealership has no desire to figure it out, and they have the poorest customer service I have ever dealt with. THis issue came on suddenly with no warning. Be safe G6 drivers!