The contact owns a 2016 GMC Terrain. The contact stated that while driving in the rain, the windshield wipers failed to operate as needed without warning. The contact pulled over and restarted the vehicle; however, the failure persisted. The contact stated that an abnormal, cracking sound was coming from the windshield wipers when she attempted to activate them. The contact took the vehicle to an independent mechanic where he repaired the windshield wipers. The contact notified the manufacturer and was informed that there were no recalls on the vehicle. The contact filed a complaint with the manufacturer. The vehicle was repaired. The failure mileage was approximately 38,000.