24/7 Mobile Truck, Diesel and Trailer Repair Services Across AZ and NM
Cornwell’s Truck Repair keeps trucks on the road with 24/7 mobile diesel repair, heavy-duty towing, full-service shop repairs, and preventive fleet maintenance across Arizona and New Mexico. Since 2008, we’ve supported truckers and logistics fleets by responding fast, diagnosing issues correctly, and repairing trucks directly at the breakdown location—saving costly tow bills and downtime.
Whether you operate a single big rig or manage a full fleet,
we come to you, day or night, anywhere across the I-10 corridor.
Our Core Services
We provide complete diesel and heavy truck support on the roadside or in our shops.
Mobile Truck Repair—We Come to You
Stuck on the road, at a rest area, or at a job site?
We dispatch mobile techs 24/7 for:
- Battery, alternator and starter failures
- Brake chambers and air leaks
- No-start diagnoses
- Tire replacement
- Fuel issues
- Electrical/ECM problems
- DEF/DPF/emissions faults
- Check-engine diagnostics
- Forced regens
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Mobile Service 24/7
Full-Service Truck Repair
Our shops in Tucson and San Simon handle heavy-duty repairs, including
- Diesel engine diagnostics
- Cooling system service
- Driveline work
- Clutch and transmission repairs
- Hydraulic repairs
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Truck Repair
Diesel and Semi Truck Repair
From ECM fault tracing to power-loss issues, our ASE-certified diesel techs fix complex failures that road teams can’t.
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Diesel/Semi Truck Repair
Diesel and Semi Transmission Repair
We handle automatic and manual transmissions, clutches, and driveline complaints.
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Diesel/Semi Transmission Repair
Trailer Repair and Roadside Trailer Service
We repair:
- Air systems
- Tires
- Axles
- Structural issues
- Lighting and electrical
- Landing gear
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Trailer Repair
Preventative and Fleet Maintenance
Stay ahead of breakdowns with scheduled inspections and maintenance programs.
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Preventative and Fleet Maintenance
24/7 Heavy-Duty Towing
If onsite repair isn’t enough, we tow:
- Semis
- Trailers
- Buses
- Box trucks
- RVs
- Heavy equipment
Towing is available anywhere across AZ and NM.
Proudly Serving AZ and NM Truckers
Why Fleets and Drivers Choose Cornwell’s
Truckers rely on us because we offer:
24/7 emergency response
Mobile diesel repairs anywhere
Two full-service locations
Heavy-duty towing
Fair pricing
ASE-certified diesel mechanics
15+ years of credibility
Trusted reputation and 5-star reviews
Every mile counts—and we protect yours.
What Truckers Say
Drivers praise our:
“Fast roadside arrival and on-the-spot repairs.”
“Knowledgeable diesel techs who explain everything.”
“Honest pricing and no surprise charges.”
➡ Link to Reviews
Frequently Asked Questions
Do you really dispatch technicians 24/7?
Yes—nights, weekends, holidays—we never shut down.
Can you fix DEF or emissions faults roadside?
Yes—including forced regens and sensor tracing.
Do you work on fleets?
Absolutely—we support logistics, municipal and private operators.
Can you tow my truck if roadside repair fails?
Yes—light, medium, and heavy-duty towing.
Do you serve New Mexico?
Yes—especially Lordsburg and I-10.
Call for Mobile Service or Shop Scheduling
📞 Call now for 24/7 service—we come to you.
From roadside emergencies to scheduled PM,
Cornwell’s keeps you moving.