Heavy-Duty Diesel Repair in Phoenix, AZ
Diesel engines are built for power and longevity, but when problems arise, they require specialized knowledge and proper tools to repair. At Complete HTR, we provide full-service diesel repair for heavy-duty trucks, buses, RVs, fleets, and equipment across the Phoenix area. Whether you're dealing with poor fuel economy, loss of power, hard starts, or engine noise, our experienced technicians deliver accurate diagnostics and efficient repairs.
We repair and service:
- Diesel engines (Cummins, CAT, Detroit, International, and more)
- Fuel systems, turbos, and air intake components
- Cooling and exhaust systems
- ECM diagnostics and electrical components
- Oil, coolant, and fluid leak issues
All work is performed to OEM standards to restore engine performance and extend operational life.
Why Choose Us?
At Complete HTR, we don’t guess—we diagnose. Our diesel repair services are thorough, consistent, and trusted by fleet managers and owner-operators alike.
- In-shop diesel repair for all classes of commercial vehicles and equipment
- OEM and aftermarket part support for repairs and rebuilds
- Skilled diagnostics to pinpoint engine, fuel, and emission issues
- Mobile diesel diagnostics and select repairs within 50 miles of Phoenix
- Coffee and lounge space while you wait
- Optional pick-up and drop-off services for your convenience
From routine service to complex engine repairs, we handle diesel systems with precision and care.
Mobile Services and Roadside Assistance Within 50 Miles
Complete HTR offers mobile diesel diagnostics and limited repairs within a 50-mile radius of Phoenix, AZ. If your truck or equipment can’t make it to the shop, our mobile team provides on-site evaluation and can coordinate towing if necessary.
Schedule Your Diesel Repair Now: Call 623-745-5896!
Call 623-745-5896 now to schedule your diesel engine service or repair with Complete HTR. We look forward to hearing from you.
FAQs
What Areas Do You Serve?
We are located at 2450 S 7th Street Phoenix, AZ 85034 off the I-17 and 7th Street. We also proudly serve the greater Phoenix area, including Tempe, Glendale, Mesa, Scottsdale, Chandler, and more.
What Are Common Diesel Engine Problems?
Issues include fuel injector failure, turbocharger problems, low compression, hard starts, and loss of power. Diagnosing the root cause early prevents more extensive engine damage.
Do You Work on All Diesel Engine Makes?
Yes. We service Cummins, Caterpillar, Detroit Diesel, International, and other major diesel engine platforms. Our team has the tools and training to handle each system properly.
How Can I Get in Touch?
Call 623-745-5896. We’ll schedule your diesel repair—either at our Phoenix shop or with on-site diagnostics if you’re within 50 miles.
Services
We offer mobile truck repair, emergency roadside assistance, and towing within a 50-mile radius of our Phoenix shop. If you’re broken down on the highway or can't leave the yard, our mobile units arrive fully equipped to handle diagnostics, repairs, and maintenance on-site.
Don't Take our word for it.
Read Customer Testimonials.
"Great reliable truck repair and mobile work. Ivan and Adrain great service guys."
"Amazing customer service, fair pricing and quick in and out. Called first, made a same day appointment, was out in about 5 hours. I definitely recommend them for the truck driver in need of service."
"Had DEF pump replaced on one of our Freightliner Cascadias. Service was fast, friendly and very economical. Will recommend to others. Small but Great place who will treat you right!"
Contact Us
Let us know what is going on with your vehicle, and we will get back to you soon with a quote.