Denny's 13302 Harbor Blvd. 7:00 AM - 2:00 AM 7:00 AM - 2:00 AM 7:00 AM - 2:00 AM 7:00 AM - 2:00 AM Open 24 Hours Open 24 Hours Open 24 Hours13302 Harbor Blvd. Garden Grove, CA 92843 US