Diamond Diesel & Auto is your leading truck repair of Beecher, IL We specialize in light-duty truck repair, diesel engine repair, and fleet repair and maintenance. With over 30 years of combined experience, we offer diagnostics, suspension work, full custom builds, and more. Our team of certified technicians provide exceptional service and quality repairs to customers in the Southeast Illinois area. Since 2017, Diamond Diesel & Auto has been dedicated to providing the best truck repair experience to all our customers. We are committed to providing reliable, quality service and always use the latest technology and industry-leading methods. Our knowledgeable and experienced staff will help you find the right solutions for your vehicle's needs.