DIESEL MAINTENANCE AND REPAIR

Great Results.
No BS.

Book Your Truck's Service Appointment

Specializing in Power Stroke, Cummins and Duramax Engines

Professional, Knowledgeable, and Friendly!!! They get the job done right the first time and at a reasonable price. Thanks Guys!!
Had a great experience and highly recommend their services. Great customer service as well.
Very knowledgeable on trucks. Even though they normally work on diesel trucks. They worked on my Nissan Titan for some fab work on the mounting bracket for lower control arm. Looks like it never happened. They were able to keep their time line of 2-3 weeks for completion.
great place, good prices and easy to work with
We take our trucks there because we trust their work and they always communicate with us if they run in to an issue or if anything else needs to be done . Definitely recommend
After another shop worked on my 2024 Ford F-350 Super Duty, I ended up having to redo almost everything. Thankfully I found Stateline Diesel, and the difference was night and day.

These guys actually know what they’re doing. They went through the truck correctly, fixed the issues the previous shop created, and made sure everything was done right the first time. Communication was great, turnaround time was solid, and the quality of work gave me confidence in my truck again.

It’s hard finding a shop you can truly trust, especially with newer diesel trucks, but Stateline Diesel earned my business going forward. Highly recommend them to anyone needing honest, knowledgeable diesel work done right.
Jake and his team at Stateline Diesel Performance are First Class. They are very knowledgeable, detailed and transparent on everything.
I highly recommend this shop. Allow me to “highlight” Jake! He’s professional, knowledgeable, and attended to all my questions and concerns. Ultimately he delivered excellent customer service! -Russ R
I’m honestly surprised by some of the reviews I’ve seen, because my experience with State Line Diesel, their employees, and especially the owner has been nothing but positive.

I’m a woman who drives a big truck, and for most of my life my dream was to own a monster truck! Now, at my age, I’ve toned it down just a bit—but not too much. I lifted my truck 8 inches, changed the tires to 37s, added rock lights, cab lights, grill lights, and new wheels. From start to finish, everyone at Stateline Diesel was incredibly kind, welcoming, and made me feel right at home.

At the end of the day, this is an automotive shop. They’re not trying to win a Mr. Congeniality award—and frankly, I don’t expect them to. I don’t get offended by directness. What matters to me is being respectful, being professional, and doing quality work. Stateline Diesel is here to do great work on trucks, and that’s exactly what they did. If some people are upset about the owner’s personality, maybe that’s something they need to reflect on themselves. I’m far more concerned with skill, integrity, and results—and this shop delivers on all three.

State Line takes real pride in their work, and if something isn’t to your liking, they make it right. I truly appreciate their honesty, transparency in pricing, and straightforward feedback. At the end of the day, this is a business—they can’t give things away for free. Quality work costs money, they need to pay their technicians, and truck upgrades don’t come cheap. But when you’re investing this kind of money, you want to take your truck somewhere that genuinely cares.

State Line Diesel does exactly that, and I wouldn’t hesitate to recommend them!
I don’t think I have ever left a review before, so the fact that I am going out of my way to leave one for these folks should speak for itself.

The folks over here are honest and went above and beyond to take care of me.

Are they busy? absolutely. But that should be an indicator to you of the work that they do because people want their business. So be patient with them and give them some sympathy! Good work is hard to find in this business and they deliver it so be patient with them and they will make sure you are taken care of!

I’m definitely going to continue to do business with them. It’s very hard to find genuine people who are just trying to take care of people. Look no further if that’s what you are after.
About Us

We deliver expert diesel repairs and custom upgrades without the hidden fees or the runaround.

When it comes to your truck, experience, skill, and attention to detail make all the difference in getting you back on the road quickly and safely. At State Line Diesel Performance LLC, we are the trusted diesel truck shop in the Charlotte, North Carolina area. With over 15 years of hands-on experience, our team provides the maintenance and repair services your truck needs to perform at its best.

We’ve built strong partnerships with leading brands in the industry, and we use OEM parts to ensure your truck runs reliably mile after mile. From routine maintenance like oil changes, fluid checks, and brake service to complex repairs including engine work, transmissions, and diagnostics, we handle it all with professionalism and no shortcuts.

Your truck is a vital part of your work, and you can rely on State Line Diesel Performance LLC to keep it running safely, efficiently, and dependably. When you need diesel maintenance or repair you can trust, we deliver results—every time.

Why Choose State Line?

Experience

15+ years of experience in the motorsports industry working with Hendrick Motorsports and Stewart Hass Racing.

Fleet Service and Repair

100%

Detail - Oriented

The attention to detail we deliver in all our services is second to none.

Maintenance and Repair

100%

Warranty

We offer a 12-month/12,000-mile workmanship warranty in addition to standard manufacturer warranties for our parts.

Customer Satisfaction

100%

State Line Diesel Performance LLC

Our Services

What Our Customers Say

{

I was having a fueling issue on my truck, and the guys over here at State Line Diesel Performance LLC did diagnostics and found I had an injector going bad. Their communication was great throughout the whole process. They are very professional and completed the work in a timely manner. Truck runs like a top again. Highly recommend this shop!

5
Brock R.
{

I had my Rough Country leveling kit put on my 2016 4Runner by the team at State Line Diesel Performance LLC, and the guys did a phenomenal job. Jake & Dawson answered all my questions and took care of my car just a few hours after I dropped it off. I can’t say enough about their professionalism & their knowledge of the business. I couldn’t be happier with the end result, and I plan on using these guys for all my cars’ needs. Top-notch service!

5
McCain B.
{

Jake and the crew are awesome to work with. They can handle anything from routine maintenance or mid to wild one-off builds. The team did a fantastic job customizing my truck. The truck gets compliments everywhere I go and performs equally well. Glad to finally have talent in Rock Hill that can support the truck enthusiast crowd.

5
Jeff P.

Our Diesel Repairs in Action

See Truck Builds

See Truck Builds

Check Out Wheels

Check Out Wheels

View Engine Work

View Engine Work

Our Suppliers

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35

Our Amenities

Relax While We Work on Your Truck

We know your time is valuable. That’s why our shop is equipped with a comfortable waiting area designed to make your visit as smooth as possible. While our technicians take care of your truck or diesel vehicle, you can take advantage of:

Waiting Room

Waiting Room

Complimentary Wi-Fi

Complimentary Wi-Fi

Fresh Coffee

Fresh Coffee

R

Free Wi-Fi

Stay connected, catch up on work, or stream your favorite shows.
R

Comfortable Seating

Relax in a clean, climate-controlled environment.
R

Convenient e-Waiting Options

Prefer not to wait on-site? We’ll keep you updated digitally so you can step out and return when your vehicle is ready.
At our shop, we’re not just focused on top-notch repairs and maintenance – we’re committed to making your experience easy, efficient, and stress-free.

Schedule Your Diesel Repair Today – Get Back on the Road Faster

"*" indicates required fields