225.647.3699 Monday - Friday 7:30 - 5:00 13397 Airline Hwy, Gonzales, LA 70737

Reliable Light, Medium & Heavy Duty Diesel Repair Services In Louisiana

We understand that having your diesel engine running is a top priority. Located just 15 minutes south of Baton Rouge in Gonzales, we are diesel truck & machinery experts who can offer assistance for major repairs and ongoing maintenance for light, medium and heavy duty diesels.

Whether you own a single diesel truck or an entire fleet, we have certified technicians to get any issue resolved.

Diesel Engine Services

We have access to a full range of parts and accessories to ensure your diesel engines run at peak efficiency at all times. Our dedicated service team can quickly resolve any issue that you may have with any diesel engine that you may own.

Roadside Assistance

A breakdown within your fleet can prove catastrophic for your business. Our technicians will show up quickly to get your fleet back on track. We offer round the clock roadside assistance for big rigs and fleet trucks.

Certified Technicians

A strong fleet is the sum of its parts. Our certified technicians can ensure each diesel truck in your fleet is as sturdy and well-maintained as the last. When a light comes on or a diesel engine goes down, our service team responds quickly to resolve the issue.

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Our Services

We offer a wide range of services that can keep your fleet running smoothly

Light & Medium Duty Diesel Repair

A diesel engine’s fuel system is its beating heart. Our trained technicians can ensure the engine keeps purring.  Our diesel technicians can break down, overhaul, clean, service and […]

Emergency Road Service

Say goodbye to disgruntled clients and late deliveries. Even the best diesel truck engines can break down while performing out on the road. We can send a technician […]

Heavy Duty Diesel Repair

Heavy duty diesel trucks are a significant investment for your business. Our technicians are proficient in extending the life of these large diesel engines to ensure you remain […]

Diesel Service Work

Looking for service work on your personal or business diesel engine?  Let one of our certified expert technicians help out with your smaller service work such as filter […]

Computer Diagnostics

Service light on or running at a lower power consistently? We use electronically controlled dynamometers to pinpoint service issues, and streamline repeat testing.

Financing Available

At Coy’s Diesel we understand that it’s important to get your truck back up and running ASAP.  We offer financing options that can ensure you can keep things […]


  • “The people at Coy’s Diesel take time to get to know their customers, something which other diesel repair services rarely bothered with. Have been taking my trucks to them for years and have no complaints at all.”

    Jay Abrams
  • “Coy’s Diesel is definitely hands on when it comes to diesel repair. They have saved my business a ton of money with emergency repairs on the side of the road which kept my trucks rolling.”

    Sam Maxwell
We Have A State Of The Art 14 Bay Garage
Located In Gonzales, Louisiana
Located 15 Minutes South Of Baton Rouge

13397 Airline Hwy, Gonzales, LA 70737
(225) 647-3699 info@coysdiesel.com

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