so much noise, thought it was tires, GM dealer discovered the left wheel bearing assembly was bad. Had to replace hub assembly. Warranty should have covered but didn't.

Why is it so impossible to get a straight answer about who's fault it is about this problem. we should have a better service center about the defects on your vehicle. And how can we figure out where we can actually get the part at a cheaper rate then what the auto sales people want to sell it at a higher mark up price.