About Hex 6

Welcome to Hex 6 Diesel Services, your premier destination for heavy-duty diesel repair and maintenance. Since our inception in 2017, we have been committed to providing elite-level service with a personal touch. Our facility, boasting 36 expansive bays, is designed to accommodate a wide range of on-highway and off-highway vehicles.

Diesel mechanic performing heavy duty truck repairs in Tyler, TX

Our Journey Began with...

A vision to create a one-stop shop for diesel services, and today, we proudly stand as a testament to that dream. Our team consists of eight highly skilled mechanics and three fully equipped service mobile trucks, ensuring prompt and efficient service.

At the heart of Hex 6 Diesel Services are our founders, Gary and Sarah.

Gary is a dedicated professional with a rich history in the diesel and automotive industries. His journey began in the military, where he honed his skills as a diesel mechanic. His passion for the field led him to pursue a degree in diesel and automotive technology.

He also holds a degree in business management to complement his more technical side. His leadership skills developed even further through his role as a general manager at two large dealerships. When Gary moved to Texas, this marked a significant turn in his career, where he managed equipment in the oil industry. This diverse background gave birth to Hex 6 Diesel Services, starting from a humble shop on our property. Now, our facility spans 19,000 square feet on a sprawling 26-acre plot of land.

Our other co-founder, Sarah, brings her own unique set of skills to the table. With her background in education and her degree in teaching, Sarah expertly handles all the marketing and parts management aspects of the business. Her keen eye for detail and organizational skills ensure that our operations run smoothly and efficiently.

Of course, we would be nothing without our team of eight highly skilled mechanics, parts, and service advisors. Each member comes from a different background, bringing their own individual set of skills to the shop floor. These include ASE master-certified mechanics, welders, and certified diesel technicians with dealership experience and extensive training in various applications.

We are also proudly veteran and family-owned, Hex 6 Diesel Services is also in the process of obtaining certification as a woman-owned business.

Diesel mechanics team at Hex 6 in Tyler, TX

What Sets Us Apart

What sets Hex 6 Diesel Services apart is our commitment to being a one-stop shop for our clients. We service a vast range of fleet sizes and types, catering to both on- and off-highway vehicles, including municipal vehicles and those in the oil and gas and agricultural industries. Our focus on customer service and attention to detail is unparalleled, and we utilize Fullbay, a state-of-the-art management system, to enhance our efficiency and service quality.

Trucks We Work On
Caterpillar, Chevrolet, Cummins, Detroit, Deutz, Dodge, Ford, Freightliner, GMC, Hino, International, Isuzu, Kenworth, Mack, PACCAR, Peterbilt, Volvo, and more.

Equipment We Work On
Altec, Bobcat, Bomag, Broderson, Caterpillar, CASE, Grove, JLG, Kobelco, Komatsu, Linkbelt, Nissan, Princeton, Riley, Vermeer, Barko, Geo Boy, Jaraff, and more.

Agriculture Equipment We Work on
Branson, Ford, International Harvester, Kubota, Mahindra, New Holland, Massey Ferguson, John Deere, Oliver, Yanmar, Zetor, and more.  

We look forward to helping you with all of your fleet needs in the future! 

Semi truck driving down highway in Tyler, TX

Contact Us

Contact us today to schedule an appointment or for emergency roadside assistance.

Our Customer Reviews

See what our recent customers are saying about our services.

I can't say enough about these guys when it comes to their customer service! From our first meeting I was told we want all of your business. Hex has proven time and again they meant that statement and as such they get all of our business.  Keep up the great work guys.
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Rich Herman

Hex-6 has been a great place for us. They communicate well during the repair process. They have great rates and are great at their turn around. We will continue to use Hex-6 as our go-to for repairs on our trucks!
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Karey Woods

Professional and Punctual are the first 2 words that come to mind. Gary is very thorough and he has been able to get to our repairs in a timely manner. We will continue to use Hex6.
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Jared Barey


Diesel Mechanic Services

Diesel mechanic performing Agriculture Equipment service in Tyler, TX

Agriculture Equipment Service and Repair

Struggling with inefficient farm equipment in Tyler, TX? Efficiency is key in agriculture, and malfunctioning equipment can be a major setback. At Hex 6 Diesel Services, our specialized agriculture equipment service and repair ensures that your agriculture machinery is always operating at its best.
Diesel mechanic performing bus repair services in Tyler, TX

Bus Repair

At Hex 6 Diesel Services in Tyler, TX, bus repair is more than a service – it's our passion. Specializing in heavy-duty diesel mechanics, we blend cutting-edge techniques with traditional values to deliver repairs that set industry standards, ensuring your fleet operates at peak performance.
diesel mechanic performing DOT inspection on a semi truck in Tyler, TX

DOT Inspection

At Hex 6 Diesel Services, we specialize in ensuring your heavy-duty diesel vehicles not only meet but exceed DOT standards. Stay informed about what a DOT inspection entails and how it keeps your vehicles running safely and efficiently.
Diesel mechanic performing fleet services in Tyler, TX


Is your fleet ready to shift into high gear? Hex 6 Diesel Services is here to turbocharge your fleet's performance with unparalleled services. From meticulous maintenance to advanced diagnostics, we empower your fleet to conquer every mile with ease and reliability.
Diesel mechanic performing general diesel repair in Tyler, TX

General Diesel Truck Repair

Are you struggling to find reliable general diesel repairs in Tyler, TX? Look no further! At Hex 6 Diesel Services, we specialize in comprehensive diesel repair services, catering to a diverse range of vehicles.
Diesel mechanic performing Heavy Equipment Repair Services in Tyler, TX

Heavy Equipment Repair

Is your heavy-duty equipment showing signs of wear and tear? In Tyler, TX, Hex 6 Diesel Services is your trusted partner for reliable heavy equipment repair, ensuring your machinery stays in peak condition.
Diesel mechanic selling truck parts in Tyler TX

Heavy-Duty Truck Parts

Are you in Tyler, TX, looking for top-quality truck parts for your heavy-duty diesel vehicles? At Hex 6 Diesel Services, we understand the importance of reliable parts for your fleet.
Diesel mechanic performing mobile repairs in Tyler, TX

Mobile Truck and Off-Highway Equipment Repair

When your heavy-duty diesel truck hits a snag in Tyler, TX, Hex 6 Diesel Services is the answer. Our mobile truck repair service provides on-the-spot repairs, ensuring that help is always just a phone call away. We're here to get you back on the road quickly and safely.
Diesel mechanic performing oil & gas industrial equipment services in Tyler, TX

Oil & Gas Industrial Equipment

Are your oil and gas operations being hindered by equipment downtime in Tyler, TX? In the demanding world of oil and gas, efficient and reliable equipment is a necessity. At Hex 6 Diesel Services, we're dedicated to providing top-tier industrial equipment services and repairs.
Diesel mechanic performing Preventive Maintenance in Tyler, TX

Preventive Maintenance

Do you know the secret to maximizing the lifespan of your heavy-duty diesel vehicles and off-highway equipment? At Hex 6 Diesel Services in Tyler, TX, we offer top-tier preventive maintenance that's more than just a service – it's a performance booster for your entire fleet.
Diesel mechanic performing emergency roadside assistance in Tyler, TX

Roadside Assistance

Standard on the side of the road with your heavy-duty truck in Tyler, TX? Well, our team at Hex 6 Diesel Service is here to help! We offer a comprehensive roadside assistance service between the hours of 7.00 am and 5.30 pm, Monday - Friday. If you're in need of a hand, we've got you covered.
Diesel mechanic performing RV repair services in Tyler, TX

Rv Repair

In Tyler, TX, the road to adventure begins at Hex 6 Diesel Services. We understand that your RV is more than just a vehicle; it's your gateway to exploration. Our dedicated team is committed to detailed, efficient RV repairs, ensuring that every journey is safe, smooth, and memorable.
Diesel mechanic performing tractor repair services in Tyler, TX


Every hum, rattle, or purr of your tractor tells a story. At Hex 6 Diesel Services in Tyler, TX, we’re fluent in the language of tractor mechanics, providing unparalleled service and repair to keep your vehicle in peak condition.
Diesel mechanic performing trailer repair services in Tyler, TX

Trailer Repair

Are you worried about the performance and safety of your trailer? At Hex 6 Diesel Services in Tyler, TX, we specialize in comprehensive trailer repair services, ensuring your heavy-duty vehicles remain in top condition.
Diesel mechanic performing welding & fabrication services in Tyler, TX

Welding & Fabrication

Complex welding and fabrication tasks can be a roadblock for your fleet's efficiency. At Hex 6 Diesel Services in Tyler, TX, we turn these challenges into opportunities for enhancing your trucks' performance.