Denny's 6429 Grand Ave 6:00 AM - 11:00 PM 6:00 AM - 11:00 PM 6:00 AM - 11:00 PM 6:00 AM - 11:00 PM Open 24 Hours Open 24 Hours 6:00 AM - 11:00 PM6429 Grand Ave Gurnee, IL 60031 US