Coy's Diesel Sales, Service & Performance

13397 Airline Hwy
Gonzales LA 70737
3 Reviews

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Opening Hours

  • Mon: 7:30am-5pm
  • Tue: 7:30am-5pm
  • Wed: 7:30am-5pm
  • Thu: 7:30am-5pm
  • Fri: 7:30am-5pm


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We service all 97-present light and medium duty diesel trucks. Engine, Full Brake Inspection, Suspension and Drivetrain, Electrical Testing, AC & Heating, Coolant Systems and much more. Coy's Diesel offers the highest quality dynojet dynamometer on the market with the capability to load up to a 2000 hp truck with its dual eddy current loading system. Schedule your dyno session today. We offer online accessory sales and orders over $99 ship for FREE. I received automotive training at the Universal Technical Institute in Houston, Texas. After graduating I continued my education through the Ford Fact program. This allowed me to begin my career specializing in Diesel repair. Coy’s Diesel was started in my spare time while I was working as a certified technician in a local dealership. After being voted Employee of the year in 2008, I wanted to provide more services and I would need my own shop so I went out on my own in 2009. I hired Terry Seal who trained me when I got my start in the dealership and now we work side by side in helping customers and problem solving daily. In November of 2014 we moved into our new state of art facility off Airline Hwy and we now have the capability to provide service on all light and medium trucks, with certified technicians that have the experience to fix some of the hardest problems.