Diesel Repair in Phoenix, AZ - Diesel & Truck Repair

Your truck works hard, and so do we. Our diesel mechanics in Phoenix keep diesel and heavy-duty trucks running strong with dependable service.

Pete Kelley's Auto Service logo - Trusted Phoenix auto repair and wheel alignment shop since 1972.

Trust Your Truck to a Diesel Shop in Phoenix That Knows Diesel

Diesel engines and work trucks are built to last, but only with the right care. Hard use, towing and Arizona heat put extra stress on cooling, fuel and drivetrain components.

From routine diesel maintenance to diagnostics and diesel engine repair, we keep your truck ready for the job. For diesel repair in Phoenix, AZ, our experienced technicians provide knowledgeable service backed by decades of experience.

We handle diesel pickup repair and maintenance in Phoenix for Ford Powerstroke, Ram Cummins, and Chevrolet and GMC Duramax trucks. That includes diesel injector repair and diesel oil changes, all aimed at keeping your truck on the job and out of the shop.

“A well-maintained diesel will outwork and outlast anything. We help keep your truck ready for the long haul.” 

-Pete Kelley’s Team

Pete Kelley's Auto Service logo - Trusted Phoenix auto repair and wheel alignment shop since 1972.

WHY CHOOSE US?

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Accurate Diagnostics

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Transparent Pricing

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Same-Day Service

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Warranty-Backed Repairs

Diesel Truck Repair in Phoenix You Can See for Yourself

Diesel trucks do not get the same treatment at every shop, and most drivers find that out the hard way. In this video, George shows a diesel pickup in the bay at our Central Avenue shop. It is the same work truck repair we do for Phoenix contractors, fleets and daily drivers.

Every Diesel Repair Starts With a Diagnosis

Before we quote anything, we:

  • Scan for manufacturer-specific codes, not just generic ones
  • Test injectors, glow plugs, and fuel pressure
  • Inspect turbo, intercooler, and charge air piping
  • Check the EGR and DPF system for restriction

Phoenix heat and dust are hard on diesel engines, and towing in summer pushes cooling and fuel systems to their limits. We show you the readings and explain what is failing and why. Every diesel truck repair in Phoenix we perform is backed by the NAPA AutoCare nationwide warranty.

What Your Diesel Is Telling You

These three symptoms point to three different problems:

  • Hard starting or rough idle when cold: glow plugs or injectors.
  • Black smoke and lost power: turbo, air, or fuel delivery.
  • Frequent regens or a DPF light: a restricted exhaust system.

Our truck repair shop handles Powerstroke repair, Cummins repair and Duramax repair, including 6.7 Powerstroke repair. A soft pedal on a loaded truck calls for brake service, and towing wear shows up in the transmission, the cooling system and the suspension. A diesel oil change on schedule and scheduled maintenance prevent most of it.

Truck down? Call or schedule online and we will diagnose it, show you the parts, and give you the number in writing before we start. We also handle fleet services, and larger jobs qualify for Synchrony financing.

SIGNS YOUR TRUCK NEEDS SERVICE

Stay alert to these common warning signs – fix them early and save on bigger repairs.

1

Hard starting or excessive smoke

Trouble starting or heavy exhaust smoke can point to fuel, glow plug, or injector issues.

2

Loss of power or poor mileage

A diesel that feels sluggish or drinks fuel may have a fuel or air-flow problem.

3

Warning lights

Diesel emissions and engine systems are complex; a scan tells us exactly what needs attention.

4

It’s due for service

Diesels have their own maintenance intervals; staying on top of them prevents big repairs

COMFORT NOW, PAYMENTS IN STEPS

A major diesel or truck repair can be a big, unexpected expense. That’s why we offer flexible financing through our trusted partner Synchrony. Qualified customers can divide their repair costs and enjoy competitive rates.

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No Annual Fee

Access the credit line you need with zero annual fees.

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Convenient Monthly Payments

Spread the cost of larger brake repairs into manageable installments.

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Quick Approval - Use Instantly

Apply in minutes and get instant approval so you can get back on the road faster.

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Extended Coverage

Finance repairs over $199 with term options up to 30 months.

READY TO KEEP YOUR TRUCK WORKING?

Book your appointment today for experienced diesel and truck service.

Trusted Diesel Repair in Phoenix Since 1972

Our certified technicians are dedicated to delivering top-notch diesel repair in Phoenix. Whether you need diesel diagnostics, fuel system work, or preventive maintenance for your work truck, we have got you covered.

We pride ourselves on quality workmanship, friendly service and experienced recommendations. Thank you for choosing us to keep your vehicle running smoothly.

Drive with confidence – our diesel and truck repairs are backed by a 24-month / 24,000-mile warranty on both parts and labor. You’re protected long after the service is done.

Thanks for choosing Pete Kelley’s!

NAPA AutoCare Peace of Mind Warranty seal for 24 months or 24,000 miles of protection at Pete Kelley’s Auto Service in Phoenix.
*Restrictions may apply

in case using used parts where warranty is mentioned

TRUSTED AUTO CARE SINCE 1972

Our customers choose us for our ethics, experience, and award-winning service.

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Ethical Service

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Affordable Pricing

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Certified Technicians

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Trusted by Locals

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Award-Winning

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Family-Owned

300+ Reviews

Across Platform

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5-STAR RATED EVERYWHERE

Real feedback, real ratings – across the platforms that matter most.

GET A COMPLIMENTARY QUOTE

Getting a quote is quick & easy. Answer a few questions, and you can get an idea of the cost for any needed repairs today!

FAQs

Which diesel engines do you work on?

Ford Powerstroke, Ram Cummins and GM Duramax, including 6.7 Powerstroke repair. Our Duramax mechanics and Cummins technicians scan manufacturer-specific codes before quoting anything.

Follow the interval in your owner’s manual, and shorten it if you tow or idle a lot in the heat. Ask us to check the fuel filters and coolant during your diesel oil change in Phoenix.

Yes. We test injectors and fuel pressure first. If an injector has failed, we quote the diesel injector repair or replacement in writing.

Yes. Our truck repair shop in Phoenix handles gas and diesel pickups, and work truck repair for contractors and small fleets. See our fleet services.

Diesel maintenance in Phoenix covers oil and filters, fuel filters, coolant, air filter and an inspection of the turbo, EGR and DPF systems.

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