RG Diesel LLC

  • Overview
  • Intro
  • Photos
  • Location
  • Reviews
  • +1 423-823-9987
  • www.redgatordiesel.com
  • 3460 W Andrew Johnson Hwy, Greeneville, TN 37743, USA

Operating Hours

Monday 8:30 AM - 5:30 PM
Tuesday 8:30 AM - 5:30 PM
Wednesday 8:30 AM - 5:30 PM
Thursday 8:30 AM - 5:30 PM
Friday 8:30 AM - 5:30 PM
Saturday Closed
Sunday Closed

RG Diesel LLC Introduce

RG Diesel LLC operates within the "Auto Repair Stations" category, distinguishing itself with a highly specialized focus: the comprehensive maintenance, repair, and diagnostic services for diesel engines. Unlike typical auto repair shops that service all types of vehicles, RG Diesel LLC dedicates its expertise to the unique demands of diesel powertrains, whether found in light-duty trucks, heavy-duty commercial vehicles, agricultural equipment, or even industrial applications. This specialization makes them an invaluable resource for individuals and businesses relying on diesel power.

The environment at RG Diesel LLC is professionally structured to handle the robust requirements of diesel engine service. You can expect a facility designed for efficiency and capability. The service bays are typically spacious, accommodating larger vehicles and equipment, and are equipped with heavy-duty lifts and specialized tools crucial for diesel repair. This includes advanced diagnostic computers with manufacturer-specific software, specialized tools for fuel injection systems, turbochargers, and emissions control components. The shop floor is usually kept clean and organized, reflecting a commitment to precision and safety in a high-demand environment. The customer waiting area, while possibly more functional than luxurious, is typically clean and comfortable, providing a place for clients to work or relax. The overall atmosphere emphasizes technical expertise, reliability, and a deep understanding of complex diesel systems, aiming to instill confidence in clients that their high-value diesel assets are in capable hands.

RG Diesel LLC offers a comprehensive suite of services meticulously tailored for diesel engines. Their expertise extends across a wide range of diesel applications, including:

  • Advanced Diesel Diagnostics: This is a cornerstone service. Utilizing cutting-edge diagnostic software and equipment, they accurately identify complex issues unique to diesel engines, such as fuel pressure irregularities, turbocharger performance issues, DPF (Diesel Particulate Filter) and DEF (Diesel Exhaust Fluid) system faults, and electronic control module (ECM) malfunctions. They specialize in troubleshooting hard-to-diagnose problems.

  • Fuel System Repair and Service: Crucial for diesel engine longevity and performance, this includes the diagnosis, repair, and replacement of high-pressure fuel pumps, fuel injectors (including common rail and HEUI systems), fuel lines, and fuel filters. They also address issues like fuel contamination and poor fuel efficiency.

  • Turbocharger Service and Repair: Given the integral role of turbochargers in diesel power, RG Diesel LLC diagnoses issues like boost leaks, turbine wear, wastegate problems, and performs repairs, replacements, or upgrades to optimize turbocharger performance.

  • Emissions System (DPF/DEF/EGR) Maintenance and Repair: Navigating strict emissions regulations, they provide services such as DPF cleaning, regeneration, or replacement, DEF system diagnostics and repair, and EGR valve cleaning and replacement to ensure compliance and prevent power derates.

  • Engine Overhauls and Rebuilds: For severe engine issues or high mileage, RG Diesel LLC is equipped to perform comprehensive engine overhauls or complete rebuilds, restoring the diesel engine to optimal operating specifications and significantly extending its service life.

  • Routine Diesel Maintenance: This covers all preventative maintenance specific to diesel engines, including specialized oil changes using appropriate diesel-grade lubricants, fuel filter replacements, air filter services, and multi-point inspections to identify potential problems early.

  • Cooling System Service: Essential for managing the higher operating temperatures of diesel engines, they offer radiator repair/replacement, water pump service, coolant flushes, and thermostat replacement.

  • Transmission and Drivetrain Repair: While specializing in engines, many diesel shops also offer repair and maintenance for heavy-duty transmissions (manual and automatic) and drivetrain components like differentials and drive shafts.

  • Electrical System and Wiring: Diagnosing and repairing electrical issues specific to diesel vehicles, including battery testing, starter/alternator repair, and complex wiring harness issues.

  • Performance Upgrades and Tuning: For clients seeking to enhance power, torque, or fuel efficiency, RG Diesel LLC may offer performance tuning (ECM remapping), aftermarket turbocharger installations, and other modifications.

  • Fleet Services: They often cater to commercial fleets, providing tailored maintenance schedules, priority service, and customized solutions to minimize downtime and optimize the operational efficiency of business vehicles.

Several key features distinguish RG Diesel LLC and underscore its commitment to its clients and their diesel vehicles. Firstly, their specialized expertise in diesel engines is paramount. The technicians at RG Diesel LLC are typically highly trained, often holding specific certifications (e.g., ASE Diesel) and possessing in-depth knowledge of various diesel platforms and manufacturers, from Cummins and Power Stroke to Duramax and heavy-duty truck engines. Secondly, the investment in state-of-the-art diagnostic equipment sets them apart. Generic diagnostic tools cannot adequately service modern, technologically advanced diesel engines, making their specialized software and hardware a critical asset for accurate troubleshooting. Thirdly, a strong emphasis on quality parts, often utilizing OEM (Original Equipment Manufacturer) or high-quality aftermarket components, ensures the durability and reliability of their repairs. Fourthly, their ability to provide comprehensive solutions from routine maintenance to complex overhauls means clients do not need to seek out multiple shops for different diesel-related needs. Lastly, RG Diesel LLC often prioritizes transparent communication, providing detailed explanations of issues, clear estimates, and regular updates throughout the repair process, fostering trust with their clientele, particularly critical for businesses managing fleets.

Regarding promotional information, RG Diesel LLC's strategies are generally targeted towards their niche market of diesel vehicle owners and fleet managers. While specific, real-time offers are best confirmed directly with the shop, common types of promotions and value propositions observed in the specialized diesel repair sector include:

  • Diagnostic Specials: Offering discounted or complimentary diagnostic checks for diesel engines, especially when a "check engine" or "service engine soon" light is illuminated, to attract customers and facilitate problem identification.

  • Seasonal Diesel Maintenance Packages: Promotions often align with specific times of the year, such as "Winter Diesel Prep" packages (including fuel gelling prevention, battery load tests, and glow plug inspections) or "Summer Performance Checks."

  • Fleet Service Agreements and Volume Discounts: For businesses with multiple diesel vehicles, RG Diesel LLC may offer customized service contracts, priority scheduling, and reduced rates on maintenance and repairs, emphasizing their role as a strategic partner for fleet management.

  • Fuel System Cleaning and Additive Specials: Given the sensitivity of diesel fuel systems, promotions on injector cleaning services, fuel system flushes, or bulk fuel additive purchases can be appealing.

  • DPF Cleaning/Regeneration Offers: As DPF replacement can be costly, discounts on DPF cleaning services or forced regenerations are valuable promotions.

  • Performance Tuning Packages: For enthusiasts or commercial users seeking optimized power or fuel efficiency, special pricing on ECM tuning, turbocharger upgrades, or exhaust system modifications might be offered.

  • Warranty on Repairs: Highlighting a strong warranty on both parts and labor for diesel repairs provides significant peace of mind and is a key promotional feature emphasizing quality and reliability.

  • Free Consultations for Fleet Managers: Offering a free initial consultation to discuss fleet maintenance strategies and potential cost savings can attract new commercial clients.

In conclusion, RG Diesel LLC stands as a highly specialized "Auto Repair Station" dedicated to the intricate world of diesel engines. Their purpose-built environment, comprehensive service offerings for various diesel applications, and unwavering commitment to expert diagnosis, repair, and performance optimization make them an indispensable resource for individuals and businesses relying on the power and efficiency of diesel technology.

RG Diesel LLC Location

RG Diesel LLC Customer Reviews

We were trying to get home from Johnson City, TN to Nashville, when the wheel bearings on our old 2002, F-350 gave out!! Basically stranded, we began calling *truck repair shops* in the area. Everyone of them were busy and could not work on the truck for days. We were able to contact RG DIESEL and spoke to Meghan (part owner) who understood our plight and was able to get us worked into their busy schedule!! She saved a bay in the shop for us until we could "limp" our way there. They immediately looked to see what the problem was, gave us a quote and ordered the parts!! Total time for everything was about 4 hours! Rather than making us wait those hours in their shop, Meghan offered to take us down the road to a restaurant (Circle S Farm Kitchen, in Greenville, TN) where we were able to eat a very good meal and wait more comfortably for the work to be done! We are ever so grateful to Meghan and her husband and their mechanics who did such good work and were so helpful and kind in the process. Thank the Lord for good people like this!!

Feb 07, 2025 · Barb Jones

I can't say enough about this shop awesome staff, honest prices and quick turn around time. I Definitely recommend this shop!!!

Mar 10, 2025 · Devin Martinez

Thank you so very much for helping Michael from PON.You helped him continue on with his good deeds.

Dec 15, 2024 · nancy greenwell

I took my 2009 F250 to RG for some preventative maintenance and other repairs, that quickly evolved into a much larger issue to no fault of theirs. I’ve had bad experiences with area shops in the past, and was extremely apprehensive to have an unfamiliar shop working on my truck. RG was very fair with pricing and transparent during the entire process, even meeting me on site on a Saturday to explain the issue they found one on one. They remained in communication from start to finish and promptly answered any questions or concerns I had. Satisfied with the quality of their repair work as well. Will definitely be using them for any of my future truck repair needs.

Mar 22, 2023 · Ian Hann

So, I don’t do reviews often. For me to leave a review the experience has to be either exceptional or terrible. To say RG Diesel is exceptional is almost not sufficient! During my first visit for my 2015 GMC 3500 it was pretty routine. Change some steering components, new ball joints, transmission service, brakes, etc. When I came to pick up the truck my final price was about $1000 LESS than initially quoted. Plus they gave a First Responder/Military discount. Needless to say I was pleased with their work as well as how nice the entire staff is. My second trip today was anything less than routine as my truck had to be towed to their shop 😔. At 3pm they had my truck in the shop and by 3:30 the truck was diagnosed, running and I was on my way. All for the low cost of FREE! Now to be honest, I do have to return for a permanent fix but the temporary fix wasn’t just plugging into my OBD port and clearing some random code. There was some minor mechanical work as well. If you are in need of diesel mechanic work and you are reading through reviews trying to decide where you should go and not get taken by shady business practices, stop reading and just go to RG Diesel. They are the only ones who will ever work on my truck here in Greeneville!

Nov 21, 2023 · Bradley Fleming