Our driveway is really steep and we had to take the air dam off of our 2014. It didn't just scrape, it folded 90% of the plastic. When I bought my 2017 my dealer said he would remove the air dam for me. No problem, he said, bring it in tomorrow. When I brought it in, the service manager said no way, it's part of the cooling system and removing it will void your warranty. I thought he was full of crap, but I then read an article by a GM engineer who also said it was part of the cooling system. We never had any overheating problems with our 2014, but I'm wary of taking it off of the new car. I may cut it down some, as all but the upper 1/2 inch folds under when we drive in the garage.