Frequently Asked Questions

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We offer reliable and affordable diesel service to help keep you on the road.

Whether you drive a diesel truck for a living or manage a fleet, having an experienced and dependable service team on your side can make all the difference. At Mid Carolina Diesel, we check all these boxes and more. Check out the common questions we’re often asked about our services, then reach out to a member of our team.

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What types of vehicles do you work on?

We specialize exclusively in heavy-duty diesel repair. Our team works on tractor-trailers, semi-trucks, and large commercial diesel vehicles. Please note that we do not service passenger cars or standard everyday diesel pickups at our main repair facility.

Where is your shop located and what areas do you serve?

We are located in Mocksville, North Carolina. We proudly serve owner-operators and fleets throughout the Mid-Carolina region, including Winston-Salem, Lexington, Statesville, and Kernersville, North Carolina, providing a reliable local hub for specialized diesel maintenance and repair.

What are your hours?

Our shop is open Monday through Friday from 8:00 AM to 4:00 PM. We focus on providing high-quality, efficient shop-based repairs during these hours to get your equipment back on the road.

Do you offer truck and trailer alignment services?

Yes. We utilize a state-of-the-art alignment machine and offer wheel balancing for tractor-trailers and heavy-duty pickup trucks.

Can you help with trailer maintenance and minor body repairs?

Yes. We handle various trailer services, including repairing roof leaks and patching minor holes. However, please be aware that we do not perform major trailer body reconstruction or heavy collision work.

How do I schedule a service appointment or get an estimate?

You can request a quote or schedule your service by calling us directly or by visiting our website and using our online contact form.

Why should I choose your team over a general mechanic?

Diesel engines and heavy-duty systems require specialized knowledge and heavy-duty tools. Our technicians are experts in the intricacies of diesel performance, ensuring your commercial assets are handled by professionals who understand the industry’s demands.

Do you work with national tire accounts?

Yes, we do. As part of our alignment and tire services division, we work with national tire accounts to provide seamless service and billing for fleet customers and owner-operators.

What is your approach to customer service?

We believe in honest, direct communication. We treat every truck like it’s our own, focusing on getting the job done right the first time so you can minimize downtime and maximize your time on the road.

What specific diesel engine brands do you repair?

Our technicians are experienced with all major heavy-duty diesel engines, including Cummins, Detroit Diesel, Paccar, Volvo, and Mack. We have the diagnostic tools necessary to troubleshoot and repair complex engine issues.

Do you perform routine preventative maintenance (PM) services?

Yes. We provide comprehensive PM services, including oil changes, filter replacements, and full-system inspections to help you avoid costly breakdowns and keep your truck compliant with safety regulations.

Can you diagnose "check engine" lights or DEF system issues?

Yes. We use advanced computer diagnostics to read fault codes and pinpoint issues within the engine control module (ECM), fuel system, or after-treatment (DEF/DPF) systems.

What is your typical turnaround time for major engine repairs?

Turnaround time depends on part availability and the complexity of the repair. However, we understand the urgency in needing to have your truck on the road, so we prioritize efficient scheduling to get you back in service quickly.

Do you offer DOT inspections?

Yes, we provide thorough inspections to ensure your truck and trailer meet all federal Department of Transportation safety requirements, helping you stay legal and safe on the highway.

Are your replacement parts covered by a warranty?

We use high-quality, reliable parts for all repairs. Most of the components we install carry manufacturer warranties. Please ask your service advisor for specific warranty details regarding your particular repair.

Can you manage the maintenance schedule for my entire fleet?

Yes. We take the guesswork out of fleet management by staying on top of your vehicles’ essential needs. We monitor everything from tires and wheel seals to transmissions, hydraulics, and electrical systems, ensuring each truck in your fleet remains in peak condition without you having to track every detail.

Are your fleet services customizable based on my company's size?

Whether you operate a small local fleet of five trucks or a larger operation of 50, we provide personalized maintenance plans tailored to your specific requirements. We focus on building long-term partnerships with fleet managers to support their business growth.

How do you help minimize downtime for my fleet?

We understand that every hour a truck is off the road is lost revenue. We offer flexible scheduling, including rotating maintenance where we service vehicles one at a time or in small groups, ensuring your operations never come to a full halt for routine care.

Do you offer year-round fleet maintenance, including winter prep?

Yes. We provide comprehensive fleet services throughout the year. We highly recommend quarterly maintenance checks and specialized winter preparation to ensure your drivers are safe and your equipment stays reliable during the harsher North Carolina weather months.