Heavy-Duty Diesel Mechanic

Baton Rouge, LA

24/7 Emergency Tractor Trailer Roadside Assistance

Parts and Labor Warranties

Over 20 Years of Experience

Hours:

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Heavy-Duty Diesel Solutions You Can Trust

When your heavy-duty diesel truck needs expert care, Coy's Diesel is your reliable partner. We've been serving Southern Louisiana since 2009, bringing over two decades of experience to every job. Our family-owned and operated shop understands the importance of keeping your diesel engine running smoothly.

At Coy's Diesel, we're committed to providing exceptional service that goes beyond basic repairs. Our certified technicians are equipped to handle a wide range of diesel engines, offering comprehensive diagnostics with a quick turnaround of 2-3 days. We stand behind our work with a generous 1-year or 12,000-mile warranty on both parts and labor, giving you peace of mind long after you leave our shop. For those unexpected breakdowns, we offer 24/7 emergency services for tractor-trailers, with roadside assistance available within 2-4 hours. Don't let engine troubles slow you down—
contact us today and experience the Coy's Diesel difference.

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Why Choose Us

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Parts and 

Labor Warranties

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24/7 Emergency Tractor Trailer 

Roadside Assistance

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Over 20 Years 

of Experience

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Fully Licensed 

and Insured

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Family and 

Locally Owned

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Certified 

Technicians

Caterpillar

Our expertise in Caterpillar engines ensures your heavy-duty equipment performs at its peak. We're well-versed in the intricacies of these powerful machines, providing tailored solutions for maintenance and repairs.

Cummins

Cummins engines are known for their reliability, and we're here to keep them running strong. Our technicians are trained to handle all Cummins models, offering precise diagnostics and efficient repairs.

Detroit

Detroit engines require specialized knowledge, and our team has it in spades. We provide comprehensive services for Detroit diesel engines, ensuring they deliver the power and efficiency you need.

Freightliner

Freightliner trucks demand expert care, and that's exactly what we offer. Our services cover all aspects of Freightliner maintenance and repair, keeping your fleet on the road and productive.

International

International trucks are built tough, and we're here to keep them that way. Our technicians are well-versed in International's diverse range of engines, providing expert service for optimal performance.

Kenworth

Kenworth's reputation for quality aligns perfectly with our commitment to excellence. We offer specialized services for Kenworth trucks, ensuring they maintain their legendary reliability and efficiency.

Peterbilt

Peterbilt trucks are synonymous with American trucking, and we treat them with the respect they deserve. Our team is equipped to handle all Peterbilt models, providing top-tier maintenance and repair services.

Volvo

Volvo's commitment to safety and efficiency is matched by our dedication to quality service. We offer comprehensive care for Volvo trucks, ensuring they continue to deliver the performance and reliability you expect.

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Here's what our satisfied customers are saying...

At Coy's Diesel Sales, Service & Performance, we take pride in providing exceptional tractor trailer truck repair and roadside assistance services to our customers. We would be grateful if you could share your thoughts about our business with others. Your feedback helps us improve and helps others make informed decisions. Please take a moment to leave a review of Coy's Diesel Sales, Service & Performance and let others know what you think.

Frequently Asked Questions

  • Can you work on all types of heavy-duty diesel trucks?

    We service a wide variety of heavy-duty diesel trucks, including semis, dump trucks, and commercial fleet vehicles. Our team has experience with both older engines and the latest computerized diesel systems. We use up-to-date diagnostic tools and techniques to ensure that every repair is done efficiently and correctly. Our focus is on keeping your truck running safely and reliably. When customers look for a diesel mechanic in Baton Rouge, LA, we provide the expertise to handle nearly any truck they bring us.

  • Do you offer emergency repairs if my truck breaks down unexpectedly?

    Yes, we offer prompt emergency repair services to minimize downtime. We understand that unexpected breakdowns can disrupt schedules and impact business operations, so we prioritize quick response. Our technicians assess the problem efficiently and implement solutions to get your truck back on the road. We communicate with customers throughout the process so they know what to expect.

  • How do you determine if a part needs repair or replacement?

    We carefully inspect each component to determine the best course of action. Our goal is always to provide cost-effective solutions while maintaining the safety and longevity of your truck. We consider wear, performance, and potential future issues before making a recommendation. When someone needs a diesel mechanic in Baton Rouge, LA who offers thorough guidance, our team is ready to help.

  • Can you perform complete engine rebuilds and overhauls?

    Yes, we handle full engine rebuilds and overhauls for heavy-duty diesel trucks. Our team is trained to disassemble, inspect, and rebuild engines with precision. We walk customers through the process so they understand what’s happening at every step. Rebuilds are performed using high-quality parts to ensure long-lasting results. We provide this service to help trucks perform like new, and customers who need a diesel mechanic in Baton Rouge, LA can rely on our expertise.

  • Do you offer maintenance programs for fleets or individual trucks?

    Absolutely, we offer custom preventive maintenance programs tailored to each truck or fleet. These programs help prevent major issues, reduce downtime, and extend the life of your vehicles. We schedule services according to mileage, engine hours, and manufacturer recommendations. Businesses and individuals alike appreciate having a diesel mechanic in Baton Rouge, LA they can count on for routine care.

  • Can you handle fuel system issues such as injectors or pumps?

    Yes, our team can diagnose and repair all types of fuel system problems, including injector and pump failures. We also clean and replace filters and other components to restore optimal performance. Ensuring the fuel system functions correctly helps trucks maintain power, efficiency, and reliability. Customers often notice immediate improvements after our work. Our technicians bring the expertise of a skilled diesel mechanic in Baton Rouge, LA to every fuel system repair.

  • Do you work on emissions systems to keep trucks compliant?

    We service all major emissions components, including DPF, EGR, and SCR systems. Keeping these systems functioning correctly is essential for regulatory compliance and engine performance. Our team can clean, repair, or replace components as needed.

  • What should I expect during a full-service inspection?

    During a full-service inspection, we check brakes, suspension, drivetrain, electrical systems, and hydraulics. We provide a detailed report of any issues and recommend necessary repairs. Customers looking for a diesel mechanic in Baton Rouge, LA can trust our inspection process to be thorough and transparent.

  • Do you provide performance upgrades for heavy-duty trucks?

    Yes, we offer performance upgrades such as engine tuning, exhaust enhancements, and fuel system improvements. We assess each truck individually to recommend upgrades that will deliver measurable benefits. All modifications are done safely and in accordance with manufacturer standards. Anyone looking for a diesel mechanic in Baton Rouge, LA to improve truck performance can rely on our expertise.

  • Can you handle warranty repairs or manufacturer-required services?

    We follow all manufacturer guidelines when performing warranty or required maintenance work. Our team uses approved parts and keeps detailed records of each repair. For clients who need a diesel mechanic in Baton Rouge, LA to handle warranty work correctly, we are fully equipped and experienced.