Tri-County Diesel Service

Tri-County Diesel Service Tri-County Diesel Service offers incomparable and complete truck repair and maintenance services.

When the check engine light comes on in a vehicle, it means there is something wrong with the engine management system. ...
09/16/2026

When the check engine light comes on in a vehicle, it means there is something wrong with the engine management system. If you have a more severe issue with your semi, bring it to our truck repair shop in San Antonio, and we will run tests to find the solution to your engine light problem. Here at Tri-County Diesel Svc, we care most about your safety, so our technicians are trained and ready to assist when needed. Book an appointment online, https://tricountydieselservice.com, or call us today!

Your semi-truck's transmission handles constant stress from heavy loads and long hours. At Tri-County Diesel Svc in San ...
09/14/2026

Your semi-truck's transmission handles constant stress from heavy loads and long hours. At Tri-County Diesel Svc in San Antonio, we specialize in keeping it working properly. Learn more at https://tricountydieselservice.com.

If you notice smoke coming from under your semi-truck's hood, it could be due to a small amount of motor oil or other fl...
09/09/2026

If you notice smoke coming from under your semi-truck's hood, it could be due to a small amount of motor oil or other fluids spilling onto the hot engine or exhaust system. This issue shouldn't be ignored, as it could indicate a bigger problem. Bring your truck into Tri-County Diesel Svc, where our experienced technicians can diagnose and fix the issue. Visit https://tricountydieselservice.com or call us today!

When it comes to semi-trucks, time is money. If your truck is down, that's lost business. Routine inspections drasticall...
09/07/2026

When it comes to semi-trucks, time is money. If your truck is down, that's lost business. Routine inspections drastically reduce the risk of major complications. Avoid unnecessary repairs and downtime with a full-service inspection from the knowledgeable technicians at Tri-County Diesel Svc. Located in San Antonio, we’ll keep your rig running smoothly. Visit https://tricountydieselservice.com today to schedule your inspection!

The condition of your semi-truck suspension directly affects your braking power. If your suspension isn’t absorbing shoc...
09/02/2026

The condition of your semi-truck suspension directly affects your braking power. If your suspension isn’t absorbing shocks properly, your stopping distance increases, putting you at risk. Stay safe, and let Tri-County Diesel Svc in San Antonio inspect and service your suspension system today!

From minor leaks to complete system failures, our big truck repair shop in San Antonio has the tools to fix any air cond...
08/31/2026

From minor leaks to complete system failures, our big truck repair shop in San Antonio has the tools to fix any air conditioning problem. Get expert diagnostics and dependable repairs every time. Comfort is just a service call away!

Engine, transmission, coolant, and brake fluids all work together to keep your semi-truck running smoothly. Tri-County D...
08/26/2026

Engine, transmission, coolant, and brake fluids all work together to keep your semi-truck running smoothly. Tri-County Diesel Svc in San Antonio offers complete fluid maintenance services. Learn more at https://tricountydieselservice.com.

Cold weather is hard on semi truck's batteries, and a weak one won’t last long in tough conditions. Trust Tri-County Die...
08/24/2026

Cold weather is hard on semi truck's batteries, and a weak one won’t last long in tough conditions. Trust Tri-County Diesel Svc for testing and replacement before you hit the highway. Schedule service today at https://tricountydieselservice.com.

Your truck’s differentials handle massive torque and loads—regular fluid changes at Tri-County Diesel Svc prevent wear a...
08/19/2026

Your truck’s differentials handle massive torque and loads—regular fluid changes at Tri-County Diesel Svc prevent wear and costly repairs. Book a differential service with us by pressing the link to our website now! https://tricountydieselservice.com

Your semi truck check engine light is designed to catch problems before they become breakdowns. If you notice poor accel...
08/17/2026

Your semi truck check engine light is designed to catch problems before they become breakdowns. If you notice poor acceleration or unusual engine noise, it’s a sign to act. Don’t risk downtime on the road. Visit Tri-County Diesel Svc in San Antonio and schedule services online at https://tricountydieselservice.com.

Address

18515 Wilhelm
San Antonio, TX
78266

Opening Hours

Monday 8am - 5pm
Tuesday 8am - 5pm
Wednesday 8am - 5pm
Thursday 8am - 5pm
Friday 8am - 5pm

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