RepairPal Certified shops can diagnose and repair your 2004 Hyundai Sonata. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
You can get all the technical information a Hyundai dealership tech gets at:
www.hmaservice.com
It's free for Hyundai owners. Very nice. Check there for any information regarding your cruise control you need.