Diesel Repair in Killeen, Harker Heights, and Fort Hood

Trusted Diesel Mechanics in Central Texas

At Mayo Autoworks 2 and Mayo Autoworks 3, we understand diesel. Whether you’re driving a light-duty pickup, a heavy-duty work truck, or a fleet of commercial diesels, our team has the tools and training to keep your diesel engine running at peak performance.

Serving Killeen and Harker Heights, TX, our certified technicians specialize in diesel diagnostics, maintenance, and repairs tailored to the unique demands of diesel systems. We proudly work on Cummins, Duramax, Power Stroke, and more—delivering dealer-quality service without the dealership price tag. Please note: Mayo Autoworks 1, also located in Killeen, is separately owned and operated.

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Diesel Repair Services in Killeen & Harker Heights

Diesel engines are engineered for strength, longevity, and hauling power—but that doesn't mean they’re maintenance-free. In fact, diesel systems are highly specialized, requiring precise diagnostics and service expertise to prevent costly failures.

At Mayo Autoworks 2 and Mayo Autoworks 3, our technicians are trained to spot early warning signs like hard starts, poor fuel economy, loss of power, black smoke, or warning lights on the dash. Using advanced diesel scan tools and high-grade parts from Worldpac and NAPA, we diagnose and repair everything from injectors and turbochargers to glow plugs, fuel pumps, and EGR systems.

Many local drivers rely on their diesel trucks for both work and personal use, making uptime critical. Whether you own a Ford Super Duty with a Power Stroke engine or a RAM truck with Cummins power, we handle repairs with speed and precision. And because we’re NAPA AutoCare and ASE certified, your repairs are backed by nationwide warranties and completed to the highest professional standards.

Don’t settle for generic auto shops that “also work on diesels”—trust the certified diesel repair experts at Mayo Autoworks 2 and Mayo Autoworks 3 for service that protects your powertrain and your productivity.

Diesel Engine Service You Can Rely On

Mayo Autoworks 2 and Mayo Autoworks 3 are proud to be the local authority on diesel vehicle care. With locations in both Killeen and Harker Heights, we make it easy for truck owners and fleet operators to access reliable, transparent diesel service close to home. Our skilled mechanics are trained on the complexities of diesel engines and take the time to perform detailed inspections and accurate repairs that last.

When you come in for diesel repair, we’ll start with a full-system diagnostic to identify performance issues, fault codes, or mechanical wear. We explain what’s needed and why—ensuring you stay informed throughout the process. Whether it’s a simple sensor replacement or a full top-end rebuild, we perform every service with your safety, performance, and uptime in mind.

Key Benefits of Choosing Us for Diesel Repairs:

Certified expertise in Power Stroke, Duramax, and Cummins
ASE and NAPA AutoCare certifications with nationwide warranties
State-of-the-art diesel diagnostic tools and scan equipment
Two convenient locations in Killeen and Harker Heights
Trusted RepairPal shop with honest pricing and clear communication

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Diesel Repair Near Me in Killeen & Harker Heights

Searching for “diesel repair near me” in Central Texas? Look no further than Mayo Autoworks 2 and Mayo Autoworks 3. With facilities in Killeen and Harker Heights, we provide expert diesel diagnostics and repairs designed for hardworking trucks and the drivers who rely on them. Whether you're managing a fleet, hauling heavy loads, or commuting daily in your diesel-powered pickup, our shops are equipped to handle every need—quickly, correctly, and affordably.

From fuel system service and emissions work to turbo diagnostics and powertrain repairs, we go the extra mile to restore performance and reliability to your diesel. Our customers return because they trust our honesty, professionalism, and ability to get the job done right the first time.

Schedule your diesel service with us today and experience the difference of expert care.