Rely on our experienced diesel truck mechanics to get you back on the road again in no time.

When your diesel truck starts making strange noises or a new warning light pops up on the dashboard, you’ll want to rely on an experienced and trustworthy diesel truck mechanic to get to the root cause of the issue. If you’re not sure where to turn to in the Charlotte, North Carolina region, we’d like to encourage you to visit our shop here at State Line Diesel Performance LLC. Our locally owned and operated business specializes in diesel truck repairs, maintenance, and customizations, and we’d be delighted to provide the comprehensive solutions you need to get back on the road again in no time.

If you decide to visit our local diesel shop, you’ll be greeted by one of our friendly and knowledgeable employees who will ask you what issues you’ve been noticing with your truck. Once we’ve collected some key information from you, a diesel truck mechanic will conduct a full diagnostic inspection of your vehicle. Rather than simply providing a temporary solution based on our initial assumptions, we take the time to ensure that we fully understand the problem so that we can permanently resolve it. This means a safer ride for you, fewer repairs for your truck, and greater peace of mind while you’re on the road.

Once our diesel truck mechanic has figured out the source of your vehicle issues, they will develop a tailored repair solution for you to review. Their estimate will include an approximate timeline, an upfront quote, and the pricing details for labor, parts, and other critical components. We’ll be happy to answer any questions you may have, and if you approve of the estimate, our diesel truck mechanic will start working on your vehicle right away.

"Service was great.”

“Service was great, prices were great, and the information provided was even better. Will be returning.”

★★★★★ 22^th August 2018 - Kris O.

Need a diesel mechanic you can trust? Skip the nonsense and call us.

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Services We Offer

Truck Maintenance & Repair

We have the skills and equipment needed to ensure your truck gets the care it needs, so you can get back on the road in no time.

Vehicle Customization

Vehicle customization can take your truck to the next level, giving it a unique makeover that turns heads and builds on the pride you already have in it.

Truck Detailing in Rock Hill, North Carolina

Polishing and Detailing

We have access to the latest tools in the industry to carry out our detailing services.

No runaround. No guesswork. Just solid diesel repairs — contact us today.

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Trust Our Team for All Things Fleet and Truck Maintenance

If you’d like to schedule a service or speak with a mechanic on our team, simply contact our shop today.

At State Line Diesel Performance LLC, our diesel truck mechanics serve those in Rock Hill, Columbia, Greenville, York, McConnells, Chester, Tega Cay, Clover, Fort Mill, and Indian Land, South Carolina; Charlotte, Greensboro, Raleigh, Kings Mountain, Gastonia, Waxhaw, Ballantyne, Weddington, and Monroe, North Carolina; as well as North Atlanta, Georgia and surrounding areas.

Why State Line Diesel Performance LLC?

You can count on our team’s 15+ years of experience to provide you with the services you need, whether that’s maintenance and repair, customization, or something in between. The attention to detail we deliver in all our services is second to none. We offer a 12-month/12,000-mile workmanship warranty in addition to standard manufacturer warranties for our parts.

See what some of our satisfied customers are saying about our diesel truck mechanics and others services.

Kris Osgood

Service was great, prices were great, and the information provided was even better. Will be returning.

Chris LePage

I've wanted to find a reliable diesel repair shop for my 2001 F350 7.3 PS for routine maintenance. While preparing for my annual cross country camping trip my transmission decided to dump some fluid in the driveway. Much better to happen here than in the rockies imo. My search for a local repair shop led me to State Line Diesel in Rockhill, SC despite being a hour away and after meeting Matt and seeing the shop I know I made the right choice. To some, the facility may look in disarray but as an aircraft QC supervisor I found it organized and staffed with experienced techs who actually care about their work and helping others. I would highly recommend anyone needing diesel maintenance to check out State Line Diesel. Their attention to detail and the special projects they build and sponsor convinced me I've made the right choice.

I'll update my post after my truck is completed (diesel truck repairs take time) and I'm back on the road. These guys are definitely worth your time and business.

Daniel Backeroff

Honest review. Turbo replacement and new boost tubes added/grid heater delete.

What i liked:
They were able to get me in quick and worked with me on a timeline to get me on a trip. I believe that they know what they are doing and have the experience to handle issues with vehicles. They even put on new parts that had provided within my timeframe which is something that is hard to find. They are straight forward also which I think is a positive.
What I wished were better:
Communication of when things got in since I was on a time crunch and needed to know what I needed to do for my trip. The work performed was not complete once I got the chance to look at things, I found that my grill was not fully in place and none of the screws were tight, they were on but not secured. Once I got into the truck, new codes were introduced after the work was done but original code was gone. Come to find that the MAP sensor was never plugged back in causing them. I check the fitment of the parts, one of the couplers looks like it is out of the clamp allowing an air leak. Looking to the turbo itself, it is a brand new upgrade that comes with the a new actuator with it, now either it got some dirt in the time that I have had it or it is actually the original one that I had an issue with before which prompted me to come here. I cannot confirm that but it is working so I assume it is the new one, considering. These things are fixable but were overlooked, especially with coming out of repairs with new codes I figured there would be more commitment to service. They also kept my old parts that I provided so no core necessary.

Overall understanding all of this, I still would recommend and come back here for my bigger issues. Things happen but they are good at what they do and get you back on the road!

Scott Hermanns

I had some work done on a company truck and they took good care of us. Great guys and honest work! I would highly recommend

Monte699

The team at Stateline has always helped me when I was stuck, I just drop truck off and they get me fixed. They are not just a SEMA truck building shop , they help with all types of maintenance of your average Joe truck drivers

Christopher Dix

I have a Cummins... they've helped me out a lot, they're good people and know what they're doing.

Elevate Media

I drive here all the way from Charleston because I know they'll take good care of my truck. It's more than just a truck and they understand it, any issue I've had with my truck they knew exactly what it was to fix it. So now they do all my diesel work, it's worth the trip for me.

Shaun Horne

I can't say enough good things about the Stateline Diesel Performance crew. Whether you are looking for better than OEM service for routine maintenance and repairs, or wanting to take your truck to the next level and finally reach the goals you've been planning for years, this is the place to do it.

Good, honest, hard working people that have taken care of me, and my vehicle every time. They will continue to be the only place I take my Diesel truck for any work needed, because every time I leave there, I leave with confidence that the job has been done right and they appreciate my business the same way I appreciate the quality of their work.

Costan Bacogeorge

I do not usually leave reviews but I have been searching for a good diesel shop for years often leaving me to do the work myself.
Thankfully someone recommended me to Jake at Stateline.
They took my truck in, communicated through the whole process, and got my truck running better than it ever has.
I highly recommend Stateline diesel performance and will be returning in the near future.

Todd Gleason

Jake was fantastic to deal with, my daughter had an issue with her Ram Eco Diesel which was tuned already, being from
Canada and a long way from home I wanted someone I could trust to help her out and understood tuned trucks. He did what he said he would do, and did it well, no bullshit, highly recommend this shop for diesel or anything truck. If I lived anywhere near them I would be a regular.