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



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 re-assemble failing engines to increase the lifespan of your engine.

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 to its location as and when needed.

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 on schedule for any job or project.

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 changes, fuel replacement, oil replacement, servicing canister filters etc.

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 running and pay in installments or at a later date.