Frequently Asked Questions
Have questions related to diesel repair? Find what you’re looking for here!
Heavy-duty diesel trucks should typically be serviced every 15,000 to 25,000 miles, depending on operating conditions. Severe-duty applications, like hauling or off-road work, may require shorter intervals. Regular maintenance ensures reliability, longevity, and compliance with emissions standards.
Common issues include fuel injector failure, turbocharger wear, EGR system blockage, oil leaks, and overheating. Regular maintenance, timely oil changes, and fuel filter replacements help prevent costly repairs and keep engines performing efficiently under heavy loads and demanding driving conditions.
It signals a malfunction in the engine, emission, or fuel systems. Common causes include sensor failures, EGR issues, or injector faults. Diagnostic scanning helps identify specific trouble codes for accurate repair and prevents further engine damage.
Maintain proper tire pressure, use high-quality fuel, replace filters regularly, minimize idling, and follow preventive maintenance schedules. Proper tuning and clean injectors also enhance combustion efficiency, reducing fuel consumption and emissions in heavy-duty diesel vehicles.
Preventive maintenance reduces unexpected breakdowns, improves fuel economy, and extends engine life. Scheduled inspections, oil changes, and component replacements help keep heavy-duty diesel fleets operating safely and efficiently over the long term.
Black smoke usually indicates incomplete combustion caused by excessive fuel, restricted air intake, dirty injectors, or a faulty turbocharger. Regularly checking air filters, injectors, and boost pressure helps prevent this issue and improves fuel efficiency and engine performance.
Services In Converse, TX, Near San Antonio
Your trucks work hard — and they deserve maintenance and repairs that work just as hard. At GTC Services, we handle all types of heavy-duty services to keep your vehicles safe, efficient, and compliant. Our experienced technicians use advanced diagnostic tools and proven methods to ensure every repair meets your operational needs. Each service is designed to meet the demands of modern fleets and long-haul operators across Converse, San Antonio, and the surrounding region.
Fleet Services
Do you manage a fleet and need reliable service to keep your trucks moving? At GTC Services, we provide professional fleet services in Converse, TX designed to minimize downtime, reduce costly breakdowns, and keep your vehicles road-ready at all times.
DOT Inspection
Are you ready for your next DOT inspection? At GTC Services, we help keep your trucks compliant and on the road with professional state and federal inspections you can trust.
General Diesel Repair
Need fast, no-nonsense general diesel repair that keeps your trucks earning? We diagnose, fix, and return your heavy-duty vehicles &equipment to service quickly—so you stay on schedule instead of sitting in a bay across San Antonio routes.
Bus Repair
Is your bus struggling with electrical problems, battery issues, or breakdowns that disrupt your schedule? At GTC Services, we provide dependable bus repair to keep shuttle buses and commercial buses on the road and serving passengers across San Antonio and beyond.
Preventive Maintenance
Want to avoid costly breakdowns and keep your trucks running longer? Preventive maintenance gives you the peace of mind that your fleet is safe, compliant, and ready for the road.
Heavy Equipment Repair
Need fast, reliable heavy equipment repair that keeps your crew moving? You’re in the right place. This page explains what we fix, how we work, and why owner-operators and fleet managers across San Antonio trust GTC Services for uptime.
RV Repair
Got an RV problem that’s cutting into your plans? From chassis to coach systems, our RV repair team gets you back on the road fast—with work you can trust.
Truck Welding & Fabrication
Looking for reliable welding and fabrication that keeps your trucks and trailers on the road? At GTC Services, we deliver durable, precision repairs and custom builds designed to withstand the demands of heavy-duty work.
Specific Modifications
Looking to get more out of your truck? Specific modifications can transform the way your vehicle performs, handles, and supports your business. At GTC Services, we provide heavy-duty modification solutions designed to keep your trucks reliable, powerful, and tailored to your needs.
Hydraulics Repairs & Services
Is your truck experiencing hydraulic issues that slow down your workday? At GTC Services, we provide professional hydraulics repairs and services designed to keep your heavy-duty truck reliable and safe.
Trailer Repair
Is your trailer causing downtime with unexpected breakdowns? At GTC Services, we offer dependable trailer repair services to keep your trucks and trailers moving safely in and around San Antonio.
Truck Parts & Accessories
Need reliable truck parts and accessories to keep your trucks running strong? At GTC Services, we know downtime costs money. That’s why we provide durable parts and quick service, helping drivers and fleets in Converse and San Antonio stay on the road without unnecessary delays.
Our Customer's Testimonials
Sheena
We have used this shop before. Will recommend their services to anyone. The customer service from the front to the mechanics is top tier!
Ruth
My truck needed the California inspection and Scott was great. Quick and a really nice guy. I was in and out in a flash.
Darryl
Quoted their work, exceeded quality expectations, met their timeline, then stuck to original price quoted....... PRICELESS!!!!