At GTC Services, we offer complete engine repair, rebuild, overhaul, and conversion. Whether you’re running a single rig or managing a full fleet, our technicians bring precision, efficiency, and years of hands-on experience to every engine that comes through our doors
Comprehensive Diesel Engine Solutions That Keep You on the Road
When your truck’s engine is down, every minute counts. That’s why we don’t waste time guessing. Our team uses industry-leading diagnostic equipment to identify the root cause of engine issues—whether it’s a worn piston, cracked head gasket, fuel delivery problem, or compression loss. From there, we recommend the most cost-effective and lasting solution to get you back to work fast.
Engine Repair
Minor damage doesn’t always mean you need a full rebuild. We handle everything from injector and valve replacements to gasket repairs, turbocharger service, and cooling system fixes. Our approach focuses on addressing the issue before it grows into a major failure.
Engine Rebuild
If your diesel engine has seen high mileage or suffered significant wear, a rebuild might be your best investment. We disassemble, clean, and inspect every internal component—replacing pistons, bearings, valves, and seals as needed. The result is an engine that runs as strong as the day it left the factory, with improved reliability and reduced operating costs.
Engine Overhaul
When a full teardown is required, our overhauls go far beyond routine repair. We remanufacture the engine to restore its original power, torque, and efficiency. Every bolt, bearing, and cylinder is brought back to spec using OEM or better-quality components. We know downtime is expensive, so our turnaround time is designed to be the best in the San Antonio area.
Engine Conversion
Looking to upgrade performance or adapt to a new configuration? Our custom engine conversions are tailored to your exact truck setup. Whether you’re swapping engines, upgrading from an older model, or adjusting power output for a different application, our technicians handle the entire process seamlessly—from removal to integration.
What Makes GTC Services Different
At GTC Services, we take pride in speed without compromise. Our unmatched turnaround time means you won’t be waiting days for a quote or weeks for a rebuild. Customers know that once their truck rolls in, it’s already being taken care of.
Our custom engine work is where craftsmanship meets experience. No two engines are the same, and our rebuilds are tailored to each truck’s performance goals and duty cycle. We’re also proud to be affiliated with IronLite Trailers out of Mexico, bringing access to advanced heavy-duty resources and precision components.
Through our partnership with Blackstone, we offer fleet parking, storage, and office/bay rentals—a service advantage that adds convenience for fleet managers. Plus, our roots with Guerra Truck Center, the original business that launched GTC Services, mean decades of firsthand trucking experience back every repair we perform.
When you need results you can trust, GTC delivers—every time.
Contact Us About Engine Repair, Rebuild, Overhaul, or Conversion: Call 210-648-0316!
If your diesel engine needs attention, don’t wait for it to fail on the road. Call 210-648-0316 today or visit us at 12930 IH 10 E. From diagnostics to complete rebuilds, we’ll have your truck running strong and earning again in no time.
FAQs
What Areas Do You Serve for Engine Work?
We’re based in Converse, TX, near major San Antonio routes, and proudly serve San Antonio, Schertz, Universal City, Austin, Selma, La Vernia, and New Braunfels, TX. Whether you’re nearby or within our 60-mile service radius, our team is ready to handle your engine repair needs.
How Do I Know if My Engine Needs a Rebuild or Overhaul?
If you notice excessive oil consumption, loss of power, white or blue exhaust smoke, or metal in your oil, your engine likely needs a rebuild or overhaul. These services restore compression, replace worn internals, and return your truck to peak operating condition.
What’s the Benefit of an Engine Conversion?
An engine conversion allows you to upgrade to a newer or more efficient engine setup. It’s ideal for operators looking to extend the life of a rig, improve fuel economy, or increase towing power—all without replacing the entire truck.
Get Back on the Road with GTC Services
Don’t let an engine issue slow your business down. Contact GTC Services today for dependable diesel engine repair, rebuild, overhaul, and conversion. We’ll get you back on the road fast—with power you can count on.
Repairs Located Just Outside San Antonio In Converse, TX
Whether you’re an independent owner-operator or managing a full fleet, your truck’s performance is your livelihood. Our experienced technicians handle a wide range of repair needs for heavy-duty vehicles, using advanced diagnostic tools and high-quality parts to ensure lasting results. Every repair is performed with the same goal in mind: minimize downtime and maximize reliability for every mile your truck runs across San Antonio and beyond.
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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!!!!