Trust Your Truck to Tri-County Diesel in San Antonio

At Tri-County Diesel Service, we offer San Antonio truck drivers and owner-operators complete truck repair and maintenance services, including PM schedules, air brake repair, trailer suspension repair, and more! We’ve been serving the Canyon Lake area for over two decades, building strong relationships with our clients, so we know not only their trucks but their jobs, goals, and families as well. If you drive in San Antonio, we want to be the shop you trust with your truck and your livelihood–a fact we take to heart at Tri-County Diesel Service .

Our Mission at
Tri-County Diesel Service

We know time is money for your over-the-road trucks. At Tri-County Diesel Service, we pride ourselves on quality work done in a reasonable amount of time. Each of our customer’s needs are met as quickly as possible, while never sacrificing accuracy or safety.

Minimize Truck Downtime with Personally Tailored Service

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Because our focus is trucks, we understand the needs of truck drivers and owner-operators. Primarily, you need your truck on the road, running and working for you. We’ll help you determine the best time to take your truck out of service for maintenance so your production won’t suffer. If a repair needs to be taken care of immediately, we’ll get it done ASAP. Our goal is to minimize your truck downtime and keep you on the road.

Get Your Truck Fixed Faster than with the Dealerships

Our experienced diesel mechanics work on Kenworth, International, Peterbilt, Mack, Western Star, Volvo, Ford, Freightliner, and all other big truck brands. Often we get jobs done in the same day, and because we primarily serve truck owner-operators, you won’t have to wait to bring your truck in for service like with dealerships and larger shops. Call Tri-County Diesel Service when they tell you it’ll be a week, and next time you’ll simply call us first.

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Complete Truck Repair Services in San Antonio, TX

Tri-County Diesel Service provides complete truck repair and maintenance services for all major big truck brands, including Ford, Kenworth, International, Peterbilt, Freightliner, Mack, GMC, Western Star, Volvo, Detroit, Cummins, and Cat. Our goal is to take care of all of our customers’ needs, from emergency repairs to maintaining a long-term preventive maintenance schedule. Here’s a list of our services, but if you don’t see what you need give us a call because we do it all!

Services We Offer Include

  • Trailer Truck Electrical Service & Electrical Repair
  • Truck Oil Change / Lube Service
  • Truck Radiator Service - Coolant / Antifreeze Change / Flush
  • Truck Air Filter Replacement
  • Trailer Truck Brake Inspection, Service & Repair
  • Truck Exhaust / Muffler Service & Repair
  • Truck Transmission Service & Repair
  • Truck A/C Repair
  • Trailer Suspension Repair
  • Air Bag & Spring Repair

What Our Clients Say

Proudly Serving Truck Drivers in San Antonio & Canyon Lake

Our shop is conveniently located at 18515 Wilhelm in northeast San Antonio, close to IH35 and Loop 1604 in the Canyon Lake area, which means easy access from either direction, and we’re only minutes from Schertz, Selma, and New Braunfels. If you’re delivering to the Amazon warehouse in Schertz, we’re only four miles away should your truck need maintenance or repairs while you’re on the job.

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Call Tri-County Diesel Service Today!

If you own or operate a truck in the San Antonio area, Tri-County Diesel Service can accommodate all your repair and service needs! Give us a call or schedule an appointment online today!