Duramax Repair in Romeo, MI

Driving a truck with a Duramax engine? Then you already know what a powerhouse you’ve got under the hood. Duramax diesel engines are built tough and made to handle towing, hauling, and long hours on the road. But even a beast like this needs the right care to stay in shape. That’s where we come in.

At RCC Automotive, we offer expert Duramax repair in Romeo, MI. Whether your truck needs regular maintenance or major repairs, our diesel mechanics know exactly what it needs. We’ve got the experience, tools, and training to keep your Duramax running like it should.

The RCC Automotive Difference for Duramax Repair

Not every repair shop knows diesel; even fewer truly understand Duramax engines. We’ve spent years working with them, learning their ins and outs—from older models to the latest versions. We treat each truck like our own, knowing how much you depend on it.

Here’s what sets RCC Automotive apart:

We focus on Duramax-specific diagnostics and repairs
We use top-tier parts that match or exceed OEM standards
We provide honest advice and clear communication every step of the way
We keep quick turnaround times without cutting corners
We’re always investing in new training and tools to stay ahead of tech changes

When your truck’s not working, neither are you. We take that seriously.

All-in-One Duramax Engine Services

Your Duramax engine is packed with power, and with that comes complexity. It’s not something just anyone can work on. Our diesel engine service is designed to keep everything running smoothly and catch problems before they start.

Our Duramax engine services include:

Oil & filter changes (with the right high-quality diesel oil)
Fuel filter replacements to keep your injectors safe
Valve lash adjustments (where needed)
Glow plug and relay checks
Turbo system inspections and maintenance
Complete fluid inspections (coolant, transmission, brake, and more)
Performance tuning and upgrades

We also check belts, hoses, engine mounts, and cooling fan operation. We’ve got everything your Duramax needs, whether you want to maintain factory performance or squeeze out more horsepower.

Spot-On Diesel Diagnostics for Duramax Engines

Check engine light on? Rough idle? Low power? We’ve got the tools to get to the bottom of it.

We use advanced diagnostic systems that plug into your Duramax truck’s brain. These tools tell us exactly what’s happening under the hood, so there is no guesswork, unnecessary parts swapping, or wasted time.

We diagnose:

Boost pressure and turbo lag
Fuel injector balance and response
Glow plug timing issues
Exhaust gas recirculation problems
Transmission communication faults
Sensor malfunctions and data stream issues

Whatever’s wrong, we’ll find it fast—and fix it right. We also explain everything in plain English, so you’re never left in the dark.

Fuel System Repair & Maintenance

The fuel system is one of the most important and sensitive systems in your Duramax engine. Even a small issue can mess with performance or trigger major repairs if ignored.

Our fuel system services include:

Injector cleaning, testing, and replacement
CP3/CP4 high-pressure fuel pump inspection
Fuel filter housing replacements
Pressure regulator diagnostics
Fuel leak testing
Injector return rate testing

We also help you select the best fuel additives to extend the life of your fuel system. Clean fuel equals a clean burn, which means better performance, better mileage, and fewer emissions.

Breathing Easy: Turbo & Air Intake Services

Your Duramax gets its muscle from a turbocharged system that packs air into the engine for more power. But if anything clogs, leaks, or wears out in the air intake system, your engine won’t perform like it should.

We’ll make sure your truck is breathing right with:

Turbocharger inspections and upgrades
Boost leak testing
Intercooler system checks
Air filter housing repairs
Aftermarket air intake upgrades for better flow
Wastegate and actuator testing

We also inspect intake manifolds for carbon buildup, especially in higher-mileage trucks. Whether you’re running stock or souped up, we’ll help your Duramax breathe easily.

Stay Cool with Duramax Cooling System Service

Duramax engines work hard, and that means heat. Overheating is one of the fastest ways to destroy a diesel engine, so keeping that temperature in check is absolutely critical.

Our cooling system care includes:

Radiator flushes and leak checks
Coolant line and reservoir inspections
Water pump testing and replacement
Thermostat and fan clutch diagnostics
Coolant temp sensor replacement
Pressure cap inspection

If you need better performance under load, we can upgrade your cooling system with high-flow water pumps or aftermarket radiators.

Duramax Engine Rebuilds – When You Need a Fresh Start

Sometimes, a repair just isn’t enough. When your Duramax engine has improved, we offer complete engine rebuilds.

Our rebuild process includes:

Full disassembly and inspection
Cleaning and resurfacing key components
Replacing worn or damaged parts with high-quality replacements
Precision reassembly to factory specs
Final testing and tuning

We also provide options for performance engine builds for drivers who want more power without sacrificing reliability.

Rebuilding your engine can give it a second life—and it’s often more cost-effective than replacing it altogether.

Common Questions About Duramax Repair in Romeo, MI

How often should I service my Duramax engine?

Plan for full service about every 5,000 to 7,500 miles. Towing often? Use the shorter interval. Don’t forget those fuel filters!

What’s the difference between a gas mechanic and a diesel mechanic?

Diesel engines use compression ignition, high-pressure fuel systems, and turbocharging. Working on them properly requires special training, tools, and experience.

What are the signs I need a Duramax repair?

Watch for hard starts, smoke from the exhaust, power loss, knocking noises, or fuel smells. These are all red flags that your engine needs attention.

Can I improve the performance of my Duramax?

Absolutely! We offer tuning and turbo upgrades that boost power, efficiency, and throttle response. Cold air intakes, exhaust upgrades, and performance tuning all help.

Is Duramax repair expensive?

Diesel repairs can cost more than gas repairs, but also last longer. Regular maintenance keeps costs down and prevents bigger issues.

Is it worth rebuilding a Duramax engine?

Yes, especially if your truck is otherwise in good shape. Rebuilding can save you money and extend your truck’s life by years.

Servicing All Generations of Duramax Engines

Whether you’re rocking a 6.6L LB7 or the newer L5P, we’ve got hands-on experience with every generation of the Duramax lineup.

LB7 (2001–2004): We handle injector issues and EGR retrofits
LLY (2004.5–2006): Known for overheating—we have cooling solutions
LBZ (2006–2007): Strong engine, but needs regular EGR and turbo care
LMM (2007.5–2010): We solve DPF and regen issues fast
LML (2011–2016): DEF problems? We’re on it
L5P (2017–present): Modern, powerful, and needs high-tech diagnostics—we’ve got it

If your truck is tuned, deleted, or upgraded, no worries—we can also work with modified setups.

RCC Automotive – The Local Diesel Shop Built for Duramax

At RCC Automotive in Romeo, MI, Duramax engines are kind of our thing. We love these trucks—and we know what makes ’em tick. Whether you’re a contractor who depends on your truck every day or a weekend warrior towing boats or trailers, we’ll treat your ride right.

Our diesel mechanics are trained and experienced, and they enjoy solving challenging problems—no runaround, no confusing tech talk—just solid work and fair pricing.

We offer flexible scheduling, fast turnaround, and helpful service reminders so you never miss a beat.