CDR DIESEL REPAIR SERVICES

Welcome to CDR Diesel Mechanics Repair Shop, the trusted name in diesel repair for Avondale, Arizona.

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"Avondale's #1 Diesel Repair Shop: Professional, Reliable, Fast"

We specialize in servicing heavy-duty trucks, commercial fleets, and diesel-powered vehicles. As a full-service repair shop, our certified technicians use the latest diagnostic and repair technology to handle all your maintenance and repair needs—from engine and transmission work to electrical and tire services. We’re committed to keeping your vehicles on the road and running smoothly, providing reliable solutions that maximize uptime and performance.

Our Services Include:

A full range of diesel repair and maintenance services to keep your fleet in peak condition.

Routine Maintenance

Regular maintenance is key to preventing breakdowns. Our preventive services include oil changes, fluid replacements, tire checks, brake adjustments, and more. We ensure your trucks are road-ready at all times.

Brake Services

Safety is key, and CDR Diesel Services provides complete brake inspections, pad replacements, and hydraulic repairs. Whether your brakes are squeaking or losing performance, we ensure your truck's braking system is reliable and responsive.

Engine Diagnostics and Repair

Our team specializes in diagnosing and repairing all major diesel engine systems. Whether it's fuel injection, turbocharger issues, or a complete engine rebuild, we’ve got you covered. Using the latest

Caterpillar Electronic Technician (CAT ET)

and

Cummins INSITE

diagnostic tools, we ensure your engine runs like new.

Transmission Services

From simple transmission servicing to full replacements, we handle all aspects of transmission care for a wide variety of brands and models. Our shop is equipped to service leading transmission brands, including Allison, Eaton, and Caterpillar, among others. Whether it’s diagnostics, repairs, or complete replacements, our team ensures that each transmission—no matter the make or model—receives expert care to keep your vehicle running smoothly and efficiently.

Steering and Shocks

CDR Diesel offers expert repairs for steering and suspension systems, including shock absorber replacement and power steering adjustments, ensuring your truck handles smoothly. Proper maintenance of shocks and steering doesn’t just improve handling; it also reduces uneven tire wear, saving you money on frequent tire replacements. By keeping your suspension and steering systems in top shape, you can extend the life of your tires and enjoy a safer, more comfortable drive.

Exhaust System Services

We provide full exhaust system repairs and replacements to reduce emissions and ensure compliance with state regulations. Our services also include after-treatment solutions such as Diesel Oxidation Catalyst (DOC) maintenance and Selective Catalytic Reduction (SCR) repairs to ensure your vehicle meets the latest emissions standards. Additionally, we offer comprehensive diagnostics to identify and resolve exhaust system issues efficiently, keeping your vehicle performing at its best.

Electrical System Repairs

Our technicians at CDR Diesel specialize in diagnosing and fixing electrical issues, including battery failures, alternator problems, and wiring faults. We use advanced diagnostic tools to ensure that each component—from the starter to the lights—operates reliably and efficiently. Every repair is performed to manufacturer’s specifications, ensuring your truck’s electrical system meets the highest standards for performance and safety.

AC and Heating Services

CDR Diesel Services ensures your truck's AC and heating system is fully functional, providing comprehensive repairs for issues such as refrigerant leaks, faulty blowers, clogged condensers, and heater core problems. Our AC services also include compressor replacements, evaporator repairs, and system recharges to maintain optimal cooling performance. Our goal is to keep your cab comfortable year-round, so you stay cool in the summer, warm in the winter, and ready to tackle any weather conditions on the road.

Fleet Maintenance

At CDR Diesel Services, we provide tailored preventive maintenance programs specifically designed for fleet operators. Our goal is to keep your vehicles in peak condition and reduce downtime with regular check-ups and repairs that help you avoid costly breakdowns. Our comprehensive fleet services include oil changes, fluid level checks, tire replacements, rotations, and alignments, all aimed at extending the life of your vehicles and optimizing performance. With our focus on proactive maintenance, we help ensure your fleet stays road-ready, minimizing unexpected repair costs and maximizing efficiency.

CDR Diesel Full-Service Repair and Maintenance

Unexpected breakdowns can happen at any time, but CDR is here to make diesel truck repairs as simple and stress-free as possible. As a full-service repair shop, we handle everything your truck may need—from engine and transmission repairs to electrical, suspension, and exhaust system services. Our skilled technicians will address each problem, performing repairs to manufacturer specifications to ensure long-lasting results.

What our Customers are Saying

CDR Diesel’s team is incredibly knowledgeable and fast. They got my truck back on the road in no time, and their customer service is unmatched.

"Outstanding service! They quickly diagnosed and fixed an engine issue that others couldn't. My truck runs better than ever!"

Cody Fisher

I've been bringing my trucks to

CDR Diesel Repair Services for years, and they never disappoint. From routine maintenance to major repairs, their knowledgeable staff and fair pricing make them my go-to mechanics. Trustworthy, reliable, and always ready to help—they've earned my loyalty!

Kristin Watson

After a bad experience elsewhere, I was hesitant to trust another mechanic. However, CDR restored my faith in local Diesel Repair shops. They were transparent about the repairs needed, kept me informed throughout the process, and delivered quality workmanship. Top-notch service all around!

Albert Flores

Frequently Asked Questions

How often should I service my diesel engine?

The frequency of servicing your diesel engine varies based on how and where you use your truck. Over-the-road (OTR) driving, which involves long hauls at high speeds, can put more strain on the engine and may require more frequent services to maintain optimal performance and prevent wear. In contrast, city driving with shorter trips and frequent stops may require less frequent maintenance but could lead to carbon buildup in the engine. As a general guideline, consider scheduling service every 10,000 to 15,000 miles for OTR driving and every 15,000 to 20,000 miles for city driving. However, please check your manufacturer’s recommendations for specific maintenance intervals to ensure your engine stays in top condition. Regular maintenance, including oil changes, filter replacements, and diagnostic checks, can help extend the life of your diesel engine and keep it running efficiently.

What are the common signs that my diesel engine needs repairs?

Common signs that your diesel engine needs repairs include loss of power, excessive smoke, strange noises, and decreased fuel efficiency. These symptoms can indicate issues with components like fuel injectors, turbocharger, filters, or the EGR system. If you notice any of these, have your engine checked to prevent further damage and keep it running efficiently.

What are the common causes of black smoke from a diesel engine?

Black smoke from a diesel engine often indicates incomplete combustion, commonly caused by a clogged air filter, malfunctioning turbocharger, faulty fuel injectors, or issues with the EGR system. These problems restrict airflow or fuel distribution, leading to inefficient burning of fuel. Regular maintenance of these components can prevent black smoke, improve fuel efficiency, and keep the engine running smoothly.

What should I do if my check engine light comes on?

Pay attention to how your truck runs—if you notice any unusual sounds or changes in performance, pull over safely. Visit CDR Diesel Repair Services for a thorough diagnosis. Even if there are no immediate symptoms, don’t ignore the warning light; schedule a service with CDR soon to prevent more serious damage. If there is an extreme emergency, head to the nearest diesel repair shop to address the issue immediately and ensure your safety.

How important is regular DPF cleaning?

Regular DPF cleaning is essential to prevent blockages that can lead to serious engine issues, including overheating, turbocharger strain, EGR malfunctions, and reduced fuel economy. Without proper maintenance, the entire after-treatment system can be damaged, resulting in costly repairs. Keeping the DPF clean ensures optimal performance, fuel efficiency, and longevity of your engine and exhaust system.