Prevent breakdowns before they start. H&H Diesel Service in Seguin, TX offers comprehensive preventive maintenance for diesel trucks, fleets, and equipment—on schedule, in-shop or on-site. Call us today.


Preventive Maintenance in Seguin, TX
Downtime is expensive—but preventable. At H&H Diesel Service, we provide scheduled preventive maintenance for diesel trucks, trailers, and heavy equipment. Our service helps you avoid costly repairs, extend equipment life, and stay DOT-compliant.
Our preventive maintenance includes:
- Engine oil, filter, and fuel filter changes
- Transmission and differential service
- Brake and suspension system inspections
- Steering, axle, and bearing checks
- Coolant flushes and pressure tests
- Battery and charging system inspection
- HVAC, belts, hoses, and lighting systems
- PM scheduling and digital service logs
Whether you manage a single truck or an entire fleet, we’ll help you build and follow a maintenance plan that protects your uptime.
Experience the H&H Difference
Certified Maintenance Experts: Our technicians follow OEM schedules and perform PMs using only approved fluids, filters, and procedures.
Quick Turnaround, No Backlogs: With 6 full-size bays and 8 certified techs, we keep your vehicles on schedule—even if you’re running a large fleet.
Mobile Repairs: Can’t make it to the shop? We offer dependable roadside assistance and scheduled mobile repairs to a 25-mile radius of Seguin, TX.
Service Logs You Can Count On: We track each service and provide detailed reports—perfect for DOT audits, warranty claims, and resale value.
Warranty-Backed Work: Our preventive maintenance services are covered by a 30-day workmanship warranty, and we honor all OEM part warranties.
Contact Us About PM Service Now: Call 210-332-5821!
Ready to protect your fleet and lower repair costs? Call H&H Diesel Service at 210-332-5821 to schedule your truck PM service today—fast, professional, and built around your schedule.
FAQs
What Areas Do You Serve For Preventive Maintenance?
We’re located at 7310 I-H 10 West, Seguin, TX 78155, near the I-10 intersection. We also proudly serve San Antonio, TX; Lockhart, TX; Luling, TX; New Braunfels, TX; San Marcos, TX; Cibolo, TX; Schertz, TX; Marion, TX; McQueeney, TX; Geronimo, TX; New Berlin, TX; Santa Clara, TX; and Lake Dunlap, TX.
How Often Is Preventive Maintenance Required?
PM intervals vary by truck, but most require service every 15,000 to 25,000 miles or based on engine hours. We follow OEM guidelines and help you stay compliant.
What’s Included in Preventive Maintenance?
It includes oil and fluid changes, filter replacement, inspections of brakes, suspension, steering, electrical systems, and more—everything needed to catch problems early.
How Can I Get Preventive Maintenance?
Call 210-332-5821 today to schedule. We’ll build a preventive maintenance plan tailored to your vehicle or fleet—so you can focus on driving, not downtime.
Our Services
We handle everything from diagnostics and maintenance to complete rebuilds. Whether you're stopping by the shop or broken down roadside, we’ve got you covered. H&H Diesel Service offers mobile repairs and roadside assistance within a 25-mile radius of Seguin.
Call us when you need help fast—on your schedule, at your location.
Testimonials
Here's What our customers are saying, feel free to leave us a review!
Jack Stoner





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