Emergency Roadside Diesel Repair

Gonzales, LA

24/7 Emergency Tractor Trailer Roadside Assistance

Parts and Labor Warranties

Over 20 Years of Experience

Hours:

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Emergency Roadside Truck Repair You Can Trust

Coy's Diesel stands as the premier emergency roadside truck repair service in Southern Louisiana. With over two decades of industry experience, our certified technicians are equipped to handle any truck-related emergency, ensuring your fleet stays on the road and your business keeps moving. We understand that every minute of downtime costs you money, which is why we offer 24/7 emergency services for tractor-trailers, with a rapid response time of 2-4 hours.

As a family-owned and locally operated business since 2009, Coy's Diesel has built a reputation for reliability and excellence. Our commitment to quality is backed by a 1-year/12,000-mile warranty on parts and labor, giving you peace of mind long after the repair is complete. We're proud to have been recognized with the 2025 Choice Awards and named the Best Auto Repair Shop in Essention. Whether you need on-site maintenance, pre-purchase inspections, or emergency repairs, our team is ready to deliver superior service. Don't let truck troubles derail your schedule –
contact us for immediate assistance 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

Air Brake Repair

Our skilled technicians specialize in air brake systems, crucial for the safe operation of heavy-duty trucks. We perform comprehensive inspections, repairs, and maintenance to ensure your brakes are functioning at peak performance, keeping you safe on the road.

Computer Diagnostics

Utilizing state-of-the-art diagnostic equipment, we quickly identify and resolve electronic issues in your truck's systems. Our diagnostic turnaround time of 2-3 days means you'll be back on the road faster, minimizing costly downtime.

Cooling System Emergencies

Overheating can cause severe engine damage. Our team is equipped to handle all cooling system emergencies, from radiator repairs to water pump replacements, ensuring your truck maintains optimal operating temperature.

DOT Inspections

Stay compliant with Department of Transportation regulations. Our certified technicians perform thorough DOT inspections, identifying potential issues before they become problems and helping you avoid costly violations.

DPF Regenerations

Diesel Particulate Filter (DPF) issues can significantly impact your truck's performance. We offer expert DPF regeneration services to clean and maintain your filter, restoring engine efficiency and reducing emissions.

Engine Troubleshooting & Repair

From minor tune-ups to major overhauls, our experienced mechanics can diagnose and repair any engine issue. We work on all makes and models, ensuring your truck's heart keeps beating strong.

Fuel System Problems

Fuel system issues can leave you stranded. Our team is adept at identifying and resolving fuel system problems, from clogged filters to faulty injectors, keeping your truck running efficiently.

On-Site Maintenance

We bring our expertise to you with our on-site maintenance services. Regular maintenance performed at your location helps prevent breakdowns and extends the life of your fleet, saving you time and money.

Trailer Repair

Your trailer is just as important as your truck. We offer comprehensive trailer repair services, addressing issues with brakes, electrical systems, structural integrity, and more to keep your entire rig road-ready.

Transmission Malfunctions

Transmission problems can be complex and costly. Our skilled technicians are experienced in diagnosing and repairing all types of transmission malfunctions, ensuring smooth gear shifts and optimal power transfer.
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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 respond quickly if my truck breaks down on the road?

    We provide fast emergency roadside services for trucks experiencing unexpected breakdowns. Our team is equipped to arrive quickly and assess the situation efficiently. We understand that downtime affects schedules and business operations, so we work to get vehicles back on the road as soon as possible. Customers know they can rely on us for rapid diesel repair in Gonzales, LA when they need immediate assistance.

  • Do you service all types of heavy-duty trucks on the road?

    Yes, we service a wide range of heavy-duty trucks, including semis, box trucks, and dump trucks. Our technicians are trained to handle both older mechanical systems and modern computerized engines. We pride ourselves on being a reliable source for diesel repair in Gonzales, LA for any truck type.

  • What common roadside issues can you fix?

    We handle a variety of issues that commonly leave trucks stranded. This includes engine failures, starter and alternator problems, fuel system issues, tire blowouts, and electrical malfunctions. When drivers need reliable diesel repair in Gonzales, LA, we ensure their truck is safe and operational before leaving the scene.

  • Do you offer towing if the truck cannot be repaired on-site?

    Yes, if a truck cannot be repaired safely at the roadside, we provide towing to our shop. We coordinate the transport carefully to prevent further damage and minimize downtime. Once at our facility, we perform a thorough inspection and complete the necessary repairs.

  • How do I know if a problem requires immediate roadside attention?

    We advise customers to call us as soon as they notice symptoms like unusual noises, smoke, loss of power, or warning lights. Even minor issues can escalate quickly on the road, potentially causing longer delays or safety hazards. Our team can help assess whether an emergency service call is necessary. When drivers contact us for diesel repair in Gonzales, LA early, we can often fix the issue before it becomes more serious.

  • Can you perform fuel system repairs during an emergency roadside call?

    Yes, our technicians are equipped to diagnose and repair fuel system issues on the spot when possible. This includes problems with injectors, pumps, filters, and fuel lines. We aim to get your truck running safely and efficiently without waiting for a shop visit. Customers rely on us for diesel repair in Gonzales, LA to keep their trucks running smoothly under any circumstance.

  • Do you provide emergency electrical system repairs?

    We can address a wide range of electrical issues, including battery failures, alternator problems, lighting, and wiring issues. Our team ensures that all repairs are done safely and meet manufacturer standards. Customers know they can count on us for comprehensive diesel repair in Gonzales, LA when electrical problems occur.

  • Are your technicians trained for all types of diesel engines?

    Yes, our technicians are highly trained and experienced with various diesel engines from multiple manufacturers. We continually update our knowledge to stay current with new engine technologies and electronic systems. When drivers choose us for diesel repair in Gonzales, LA, they’re getting a team with expertise across all major engine types.

  • Do you offer preventive maintenance to reduce emergency calls?

    Yes, we recommend and provide preventive maintenance to help reduce the likelihood of roadside breakdowns. Regular inspections, oil changes, filter replacements, and system checks keep trucks running safely and efficiently.

  • How do you handle repairs after-hours or on weekends?

    We offer after-hours and weekend support for emergency situations. Our dispatch team is available to coordinate a response quickly, ensuring that trucks aren’t left stranded for long periods. Technicians are prepared to travel to the location with the tools and parts needed to complete urgent repairs.