HomeAll RepliesReply To: 2017 Acadia Stiff Horn Reply To: 2017 Acadia Stiff Horn Sponsored December 7, 2017 at 6:17 am #238198 deathtrapParticipant …does anybody pay attention to this website, or even the NHTSA website? This wide-spread HORN PROBLEM is potentially lethal. C’mon GM, fix it. C’mon NHTSA, do something about it. There is no proof of any “horn enhancement” service bulletin. Sponsored Subscribe to GM Authority For around-the-clock GM news coverage We'll send you one email per day with the latest GM news. It's totally free. First Name Last Name Email Address Subscribe via Email Leave this field empty if you're human: Sponsored