Contacts Get In Touch G&R Diesel is the most advanced diesel truck performance and repair shop in Ohio, and we take great pride in that; contact us today! G&R Diesel | 4236 Harrison Rd, Fredericksburg, OH 44627 (330) 695-2039 Monday โ Friday 8:00 to 5:00 Holiday Hours: Closed November 26-27 & December 24-25 contact@grdiesel.com Facebook-f Google-plus-g Drop Us a Line: Your Name * Your Email * Subject Your Message