DIESEL SERVICES

Get your truck serviced by professionals.

Preventative Maintenance

Our Preventative Maintenance services are designed to maximize equipment uptime, improve reliability, and reduce the risk of costly breakdowns. We perform scheduled inspections, fluid and filter changes, lubrication services, and comprehensive system checks to identify potential issues before they become major repairs.


By staying ahead of wear and maintenance needs, we help extend the life of your diesel truck or equipment and keep it operating at peak performance.

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Advanced Computer Diagnostics

Our Advanced Computer Diagnostics services utilize cutting-edge scan tools and OEM-level software to accurately assess today’s high-tech diesel engines and equipment.


We retrieve and analyze fault codes, monitor live data, perform system tests, and pinpoint complex performance issues that basic diagnostics can miss. By identifying the root cause quickly and precisely, we reduce guesswork, minimize downtime, and ensure efficient, reliable repairs the first time.

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Electrical Systems

Our Electrical Diagnostic & Repair services address the complex electronic systems that power today’s diesel trucks and equipment. From no-start issues to persistent warning lights, we deliver accurate repairs that restore reliability and reduce costly downtime.


Using advanced diagnostic equipment and OEM-level software, we take a systematic approach to troubleshooting, ensuring the root cause is found and corrected rather than simply replacing parts. Whether you're experiencing intermittent electrical problems, communication faults, or complete system failures, we provide dependable solutions that keep your equipment operating safely and efficiently.

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DPF/DEF Systems

We provide expert DPF and DEF system diagnostics and repair to keep your equipment running clean and compliant. Whether you’re experiencing derates, fault codes, or performance issues, we provide dependable, long-term solutions.


Our technicians are experienced in servicing all major aftertreatment components. We perform advanced diagnostics to restore proper emissions performance and prevent recurring issues. By addressing problems early and accurately, we help reduce downtime, improve fuel efficiency, and keep your equipment operating within emissions standards.

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Advanced Computer Diagnostics

Our Advanced Computer Diagnostics services utilize cutting-edge scan tools and OEM-level software to accurately assess today’s high-tech diesel engines and equipment.


We retrieve and analyze fault codes, monitor live data, perform system tests, and pinpoint complex performance issues that basic diagnostics can miss. By identifying the root cause quickly and precisely, we reduce guesswork, minimize downtime, and ensure efficient, reliable repairs the first time.

Request a Quote

DPF/DEF Systems

We provide expert DPF and DEF system diagnostics and repair to keep your equipment running clean and compliant. Whether you’re experiencing derates, fault codes, or performance issues, we provide dependable, long-term solutions.


Our technicians are experienced in servicing all major aftertreatment components. We perform advanced diagnostics to restore proper emissions performance and prevent recurring issues. By addressing problems early and accurately, we help reduce downtime, improve fuel efficiency, and keep your equipment operating within emissions standards.

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Module/ECU Programing

Our Module & ECU Programming services ensure your diesel truck or equipment operates with the latest manufacturer updates and correct system calibrations. We perform OEM-level programming, software updates, parameter resets, and module replacements to restore proper communication and performance across all electronic systems.


Whether replacing a failed control module or correcting drivability and fault code issues, we deliver precise programming that keeps your equipment running efficiently and reliably.

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HVAC & Auxiliary Heater

Our HVAC & Auxiliary Heater services keep your cab comfortable and your equipment operating efficiently in any season. We diagnose and repair air conditioning systems, heaters, blower motors, compressors, and control modules, as well as service auxiliary and bunk heaters for reliable cold-weather performance.


From refrigerant leaks and weak airflow to complete system failures, we provide thorough diagnostics and dependable repairs to restore consistent heating and cooling.

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HVAC & Auxiliary Heater

Our HVAC & Auxiliary Heater services keep your cab comfortable and your equipment operating efficiently in any season. We diagnose and repair air conditioning systems, heaters, blower motors, compressors, and control modules, as well as service auxiliary and bunk heaters for reliable cold-weather performance.


From refrigerant leaks and weak airflow to complete system failures, we provide thorough diagnostics and dependable repairs to restore consistent heating and cooling.

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Air & Brake Systems

Our Air & Brake System services ensure your truck or equipment operates safely and reliably under all conditions. We inspect, diagnose, and repair air compressors, dryers, valves, chambers, lines, ABS components, and full braking assemblies to maintain proper air pressure and stopping power.


From air leaks and warning lights to reduced braking performance, we deliver precise repairs that keep your equipment compliant and road-ready.

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Your Truck Deserves The Best

RDR Diesel is Fontana's diagnostic and repair service of choice because we take the time to listen to you and examine the truck. We're not looking for a quick fix: we want your diesel truck to perform at its best.

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Send us details about your truck and we'll set up a conversation.

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