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Diesel Truck Repair 

Baton Rouge, LA

24/7 Emergency Tractor Trailer Roadside Assistance

Parts and Labor Warranties

Over 20 Years of Experience

Hours:

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Reliable Diesel Truck Repairs When You Need Them Most

Coy's Diesel Sales, Service & Performance is your trusted partner for all things diesel in Southern Louisiana. We've been keeping trucks on the road since 2009, combining our passion for engines with a commitment to exceptional service. Our team of certified technicians brings over two decades of experience to every job, ensuring your diesel vehicle receives the expert care it deserves.

We understand that time is money in the trucking industry. That's why we offer quick diagnostic turnarounds, typically within 2-3 days, and provide 24/7 emergency services for tractor-trailers. Our dedication to quality is backed by a 1-year/12,000-mile warranty on parts and labor, giving you peace of mind long after you leave our shop.


Whether you're dealing with a roadside breakdown or need a routine check-up, we're here to help. Don't let diesel 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

Coy's Diesel Sales, Service & Performance

Emergency Roadside Truck Repair

When you're stranded on the side of the road, every minute counts. Our 24/7 emergency roadside assistance for tractor-trailers ensures you're never left in a lurch. We aim to reach you within 2-4 hours, getting you back on the road as quickly as possible.

Heavy-Duty Diesel Mechanic

Our heavy-duty diesel mechanics are the backbone of our operation. They're equipped to handle the most complex issues in large trucks and commercial vehicles. From engine overhauls to transmission repairs, we've got the skills and tools to tackle any heavy-duty diesel challenge.

Coy's Diesel Sales, Service & Performance
Coy's Diesel Sales, Service & Performance

Light-Duty Diesel Mechanic

Don't let the name fool you—our expertise extends to light-duty diesel vehicles too. Whether you're driving a pickup truck or a smaller commercial vehicle, our light-duty diesel mechanics provide the same level of expert care and attention to detail.
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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

  • Do you work on both personal and commercial diesel trucks?

    Yes, we service both personal diesel pickups and full commercial fleets. Our technicians are trained to handle everything from light-duty trucks to heavy-duty work vehicles, giving us the ability to support many different clients. Each truck receives dedicated attention to ensure the repair is done correctly and safely. We also make sure to communicate clearly so you know exactly what your vehicle needs. When it comes to diesel truck repair in Baton Rouge, LA we’re committed to delivering reliable results every time.

  • Can you help diagnose complex engine problems?

    Absolutely. We use advanced diagnostic tools to help us identify issues quickly and accurately. Modern diesel engines are sophisticated, and pinpointing a problem early can prevent more expensive repairs down the road. Our technicians take the time to fully inspect the system before recommending solutions. You can count on us to provide clear explanations and honest assessments so you understand what’s going on with your truck.

  • Do you offer maintenance services as well as repairs?

    Yes, we handle a wide range of maintenance services, including oil changes, filter replacements, fuel system cleaning, and general inspections. Keeping up with regular maintenance helps extend the life of your diesel truck and maintain peak performance. We follow manufacturer guidelines to make sure your truck receives care that matches its needs. Many customers prefer to schedule maintenance with us because it helps prevent bigger issues. Routine servicing is one of the best ways to keep your truck reliable year-round.

  • What brands or types of diesel engines do you work on?

    We work on all major diesel engine brands, including Duramax, Cummins, and Power Stroke. Our team stays updated on the latest technology, tools, and repair procedures so we can properly service newer engines as well as older models. No matter what you drive, we take the same detailed approach to every repair. We’re familiar with the common issues that affect each brand, which helps us work efficiently and effectively. You can feel confident bringing your truck to us for any type of engine work.

  • Can you help improve my truck’s performance?

    Yes, we offer several performance upgrade options, including tuning, improved exhaust systems, and intake enhancements. Many truck owners seeking diesel truck repair in Baton Rouge, LA also want better horsepower, torque, or fuel efficiency, and we can help with all of those goals. We take the time to understand what kind of performance improvements matter most to you. Our team can explain the benefits and limitations of each upgrade so you can make an informed decision. Whether you want more towing power or smoother everyday driving, we can guide you toward the best solutions.

  • Do you provide fleet repair and maintenance services?

    Yes, we work with business owners and fleet managers to maintain and repair multiple diesel trucks. If your company relies on transportation, we know how important it is to keep every vehicle in top condition. Companies looking for dependable diesel truck repair in Baton Rouge, LA appreciate that we offer flexible scheduling and quick turnaround times. We can also help create a maintenance plan that reduces downtime and prevents avoidable repairs. Our goal is to support your business by keeping your fleet safe, reliable, and ready for work.

  • Can you handle emergency breakdowns or urgent repair needs?

    Yes, we offer fast assistance when a breakdown interrupts your plans or workday. Our team is used to handling urgent situations and works efficiently to diagnose the problem as soon as possible. We know that unexpected truck issues can cause major delays, especially for those who rely on their vehicles for business. We do everything we can to get your truck back on the road safely. When it comes to diesel truck repair in Baton Rouge, LA you can count on us to communicate clearly, work quickly, and minimize stress during the repair process.

  • Do you offer inspections before long trips or heavy workloads?

    Yes, we offer pre-trip and pre-work inspections to make sure your truck is ready for demanding conditions. These inspections help identify potential issues before they turn into costly breakdowns. We check brakes, fluids, belts, hoses, filters, and electrical components to ensure everything is working as it should. This gives you peace of mind before heading out on long hauls or tackling tough jobs.

  • Can you repair fuel system issues like injectors or pumps?

    Yes, we specialize in diagnosing and repairing fuel system problems, including injector failures, pump issues, filter clogs, and leaks. A properly functioning fuel system is essential for power, performance, and fuel efficiency. When customers need diesel truck repair in Baton Rouge, LA for poor fuel economy or rough engine performance, our team can pinpoint the cause. We use quality parts and proven repair techniques to restore your truck to proper working order.

  • Do you offer welding or fabrication services for diesel trucks?

    Yes, we provide custom welding and fabrication work for brackets, exhaust components, structural reinforcements, and more. This service is especially helpful for older trucks, heavily used work vehicles, or custom builds. We take precise measurements to ensure everything fits securely and functions correctly. Our fabrication work is designed to improve durability and extend the life of your truck. Whether you need diesel truck repair in Baton Rouge, LA or custom metalwork, we have the tools and expertise to help.