Diagnostics & Engine Work in Comal County
Locations
Texas Complete Truck Center
Accurate Engine Answers For Diesel And Gas Trucks

Why Proper Diagnostics Should Come Before Major Repairs
Professional engine work is especially important for diesel platforms because Powerstroke, Cummins, and Duramax engines each have unique patterns, service needs, and failure points. As an ASE-certified Independent Diesel & Truck Repair Shop / Fleet Service Provider, Texas Complete Truck Center understands that customers need their trucks back on the road with confidence. Whether the issue involves fuel delivery, boost performance, cooling, sensors, wiring, engine mechanical condition, or related systems, careful diagnostics help narrow the concern before repair recommendations are made. This protects the customer from unnecessary work and supports better long-term engine reliability.
Engine Testing With A Clear Repair Direction
Texas Complete Truck Center provides diagnostic support for truck owners who want accurate information, not guesswork. The team’s ASE certification and Independent Diesel & Truck Repair Shop / Fleet Service Provider focus help customers understand engine issues and choose the right repair path.
Service Process:
The diagnostic process starts with the customer’s symptoms, driving conditions, warning lights, service history, and how the truck is used. Technicians may scan for codes, evaluate live data, inspect related components, test electrical or fuel system performance, and look for mechanical or airflow concerns depending on the complaint. The goal is to connect symptoms with facts and explain the findings in plain language. Once the issue is identified, the shop can recommend the repairs needed to restore performance and help prevent repeated engine concerns.
Key Benefits:
Schedule Engine Diagnostics With Confidence
Truck owners, contractors, and fleet managers rely on their vehicles to stay productive, so clear diagnostics matter. Texas Complete Truck Center combines ASE-certified skill with Independent Diesel & Truck Repair Shop / Fleet Service Provider experience to support engine concerns on gas and diesel trucks. Whether the vehicle is a Ford Powerstroke, Ram Cummins, GM Duramax, work truck, or larger SUV, scheduling diagnostic service helps protect performance, reduce downtime, and move forward with repair recommendations based on actual testing.
Our Services
Auto Repair and Maintenance in New Braunfels, TX
Repair & Maintenance
We service oil changes, brakes, suspension, steering, drivetrain, transmission, engine, AC, cooling, electrical, and scheduled maintenance for diesel and fleet trucks.
Diagnostics / Inspection
We diagnose engine, transmission, brake, suspension, electrical, exhaust, emissions, and drivability concerns so repairs are based on real testing, not guesswork.
Performance / Off-Road Upgrades
We install lift kits, leveling kits, accessories, bumpers, winches, turbo piping, tuners, suspension upgrades, and custom fabrication for trucks and Broncos.
Truck Repair Shop Near New Braunfels, TX
Diesel, gas, fleet, and Bronco repair services in New Braunfels, TX
Texas Complete Truck Center and Texas Complete Bronco proudly serve drivers in New Braunfels and throughout the surrounding Hill Country and I-35 corridor with specialized truck, diesel, fleet, and Bronco services. Our teams work with light-duty and medium-duty diesel trucks, gas trucks, commercial work vehicles, larger SUVs, and Bronco platforms, including Ford Powerstroke, Ram Cummins, and GM Duramax models.
Whether you need diesel diagnostics, engine repair, transmission service, suspension work, brake repairs, fleet maintenance, Bronco upgrades, off-road accessories, restorations, or performance modifications, our shops are equipped to support both hardworking vehicles and custom builds. We are ASE certified and offer a 3-year/36,000-mile warranty on qualifying repairs, along with tire and road hazard protection options. Please note that we do not service semis or heavy dump trucks.
- Gruene
- Kingsbury
- Sattler
- Startzville
- Luling
- Bulverde
- Converse
- Fischer
- Live Oak
- Seguin
- Geronimo
- Marion
- Cibolo
- Schertz
- Selma
- Staples




