Tri-County Diesel Service

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

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.

Dirty transmission fluid in semi trucks causes gear slipping. Regular service keeps gears shifting smoothly. Replacing f...
08/12/2026

Dirty transmission fluid in semi trucks causes gear slipping. Regular service keeps gears shifting smoothly. Replacing fluid helps extend transmission life. Schedule transmission service at Tri-County Diesel Svc by visiting https://tricountydieselservice.com.

Coolant leaks are a common issue that can quickly lead to overheating in semi trucks. Even small leaks can impact engine...
08/10/2026

Coolant leaks are a common issue that can quickly lead to overheating in semi trucks. Even small leaks can impact engine temperature control. Professional repairs help restore system integrity. Contact Tri-County Diesel Svc in San Antonio or visit https://tricountydieselservice.com for expert cooling system support.

Poor acceleration or reduced mileage? A dirty air filter could be the culprit. Our skilled truck technicians at Tri-Coun...
08/05/2026

Poor acceleration or reduced mileage? A dirty air filter could be the culprit. Our skilled truck technicians at Tri-County Diesel Svc inspect and replace filters so your semi truck performs at its best on every haul. Book service on our website by clicking the link or give us a call to make appointments! https://tricountydieselservice.com

Your semi-truck’s braking system is one of its most critical safety components. Whether you're hauling freight on steep ...
08/03/2026

Your semi-truck’s braking system is one of its most critical safety components. Whether you're hauling freight on steep grades or navigating city traffic, properly maintained brakes ensure you can stop when you need to. Don’t risk failure, schedule a semi-truck brake inspection with the experts at Tri-County Diesel Svc by booking on our website. https://tricountydieselservice.com

Erratic gauges or a glowing battery light often mean electrical problems are developing. Get ahead of bigger issues with...
07/29/2026

Erratic gauges or a glowing battery light often mean electrical problems are developing. Get ahead of bigger issues with electrical service at Tri-County Diesel Svc in San Antonio. Make your appointment online today at https://tricountydieselservice.com.

From lubrication to cooling, fluids play a major role in keeping your semi-truck running properly. Tri-County Diesel Svc...
07/27/2026

From lubrication to cooling, fluids play a major role in keeping your semi-truck running properly. Tri-County Diesel Svc in San Antonio offers complete fluid inspections and service. Learn more at https://tricountydieselservice.com.

Gear slipping, rough shifting, or warning signs on the dash should be addressed promptly. Visit Tri-County Diesel Svc in...
07/22/2026

Gear slipping, rough shifting, or warning signs on the dash should be addressed promptly. Visit Tri-County Diesel Svc in San Antonio for expert semi-truck transmission service. Learn more at https://tricountydieselservice.com.

Worn brake components can reduce stopping control and increase strain on your truck. Tri-County Diesel Svc provides prof...
07/20/2026

Worn brake components can reduce stopping control and increase strain on your truck. Tri-County Diesel Svc provides professional semi truck brake inspections and repairs. Book your service 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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