Diesel Service

Diesel engines are built for power, performance, and durability, but they require specialized care to stay at their best. Unlike gasoline engines, diesel engines use high compression and fuel injection systems to deliver torque and efficiency, especially under heavy loads. That means when something goes wrong, you need a team with the right knowledge and equipment. At Randy’s Downtown Garage in Flagstaff and Phoenix, AZ, we offer expert diesel service and repair for all makes and models of vehicles. Our ASE-certified technicians understand the unique demands of diesel vehicles and are trained to diagnose and repair them quickly and accurately.

Diesel Repair in Flagstaff and Phoenix, AZ

Whether you drive a Ford Power Stroke, Chevy Duramax, RAM Cummins, or a diesel-powered import or fleet vehicle, we’ve got you covered. Our shops work on all makes and models, using state-of-the-art diagnostic tools to ensure no issue goes undetected. Every technician at Randy’s is ASE-certified, and all of our diesel repairs are backed by a 2-year/24,000-mile warranty. Look out for these signs that your diesel engine may need service:

• Excessive smoke from the exhaust

• Difficulty starting or rough idling

• Loss of power or acceleration

• Decreased fuel efficiency

• Unusual engine noises or knocking

• Check engine or glow plug light is on

If you notice any of these issues, don’t delay. Diesel problems can escalate quickly if left unresolved. Bring your vehicle to Randy’s Downtown Garage, where our technicians will run full diagnostics, inspect critical systems like the turbocharger, fuel injectors, and glow plugs, and provide a clear explanation of any needed repairs. We’ll get you back on the road fast, with repairs done right the first time. Plus, regular diesel maintenance helps prevent breakdowns and ensures your engine continues to deliver peak performance.

While your diesel vehicle is in our shops, we make sure your day stays on track. We offer free shuttle service, and we’ll even cover the cost of Uber or Lyft rides so you can get where you need to go. With locations in Flagstaff and Phoenix, Randy’s Downtown Garage combines expert service with modern convenience in a clean, friendly environment.

Diesel Service in Flagstaff and Phoenix, AZ

Get reliable, professional diesel service in Flagstaff and Phoenix, AZ, from the team you can trust. Call your preferred Randy’s Downtown Garage today or schedule your appointment online-we’re ready to keep your diesel engine running strong.

Your Diesel Vehicle Is In Safe Hands With The Experts At Randy's Downtown Garage.