Picked this up for 500 today and drove it away. Tags paid. 2006 lucerne with the 3800 series 3. Last owner was rear ended or clipped when entering a gas station. I look at this and say its fixable my wife say other words that well you know lol. Had the service traction control and brake assist light on with the abs. I'm thinking its Bcause the fender bender. Inside is clean and blows ac. I'll be at the junk yard soon.
You can either pull the quarter panel out enough to get everything lined up or put a quarter on it and make it nice. Depends on the miles and overall condition of the rest of the car.
You may also have a bad front wheel bearing, that can also cause all the warning lights you have on, I know that was a common issue. My DTS of that vintage had that happen a couple times