Diesel Vehicle Care

Diesel Vehicle Care

Specialized Maintenance Services for Powerstroke, Cummins & Duramax Trucks

Keeping your diesel truck on the road starts with preventive maintenance. At RG Diesel, LLC in Greeneville, TN, we focus exclusively on heavy-duty diesel platforms—ensuring your Powerstroke, Cummins, or Duramax engine receives expert care designed for long-term reliability, performance, and towing power.

Whether you’re clocking highway miles or working job sites across East Tennessee, our team helps keep your diesel engine, drivetrain, and support systems running strong. Reach out to us at 423-823-9987 to schedule a maintenance appointment.

Diesel-Specific Maintenance Services

Oil & Filter Changes

Regular oil changes with high-quality diesel-grade oil help reduce engine wear, control soot buildup, and maintain optimal engine performance under heavy loads.

Fuel System Service

We inspect, clean, and replace components as needed to ensure maximum fuel efficiency, reliable injection, and protection against contaminants.

Air Filters & Breather Service

Clean air filters are critical to efficient combustion. We inspect and replace both air intake filters and crankcase ventilation systems to keep your engine breathing easy.

Cooling System Flushes

Overheating is a major threat to diesel engines. We flush and refill your coolant, check for leaks, and inspect hoses and radiators to keep your system in top shape.

Brake Fluid & Power Steering Fluid

We test and replace fluids in key hydraulic systems to ensure responsive handling and safe braking under load.

Transfer Case & Differential Service

These drivetrain components are under constant stress in diesel trucks. We service the fluids and inspect for wear to prevent future issues.

Battery & Charging System Check

Diesel trucks demand more power, especially in cold starts. We test battery voltage, alternator output, and inspect for corrosion or wear.

Glow Plug & Grid Heater Checks

For cold-weather starts, these systems are essential. We test and replace faulty plugs or heaters to ensure reliable startup in any season.

Keep Your Diesel in Peak Condition

Diesel trucks are built to work harder—and that means they require specialized care. At RG Diesel, LLC, we help you stay ahead of wear and avoid major repairs through scheduled maintenance tailored to your engine and driving habits. Whether you’re towing, hauling, or commuting, routine care ensures your diesel truck is ready for whatever lies ahead.

Diesel Vehicle Maintenance FAQs

How often should I change the oil in my diesel truck?

Typically every 5,000–7,500 miles, but it depends on your truck's use, age, and oil type.

Do diesel trucks need different filters than gas vehicles?

Yes—diesel engines use fuel/water separators and heavy-duty oil and air filters for higher performance demands.

Why is fuel system maintenance so important in diesels?

Even small amounts of water or contaminants can damage diesel injectors or pumps, leading to expensive repairs.

Can I use regular coolant in my diesel truck?

No—diesel engines require specific coolant formulations with additives that prevent corrosion and cavitation damage.

Do I really need to service my glow plugs?

Yes—bad glow plugs can make cold starts difficult and increase emissions or fuel consumption.

Top Diesel Mechanics in Greeneville

Need Help? Call Us Now

(423) 823-9987