Heavy-Duty Diesel & Semi Truck Repair — Fleet & Owner-Operator Service

Mobile or in-shop repairs for semis, fleets, and heavy-duty trucks. Fast, professional service from certified diesel technicians

Keep your operation moving with trusted diesel experts. Maintenance, diagnostics, and emergency repairs — all handled locally in the Central Valley.

Why Choose Our Grease Trap Team

Certified Heavy-Duty Technicians

Fleet Maintenance Programs

Roadside & On-Site Repairs

Fleet Discounts & Service Contracts

Trusted by Central Valley Operators

About Our Company

Professional Heavy-Duty Diesel Repair in Visalia

At Diesel Doctor, we service semis, fleet vehicles, and heavy-duty diesel trucks across the Central Valley. From mobile roadside repair to scheduled maintenance, our certified technicians keep your rigs on the road and your business running efficiently.

How It Works

Call or Request Service

Fleet managers welcome.

Schedule Mobile or In-Shop Repair

Flexible options.

Get Expert Repairs

Engines, brakes, emissions & more.

Stay on Schedule

Fast turnaround and reliable work.

Our Gallery

Fleet or Heavy-Duty Repair Quote

Serving Visalia, Hanford, Tulare & the Central Valley.

Request Mobile Diesel Service

Our Service

Engine & Transmission Repair

Diagnostics & DEF Systems

Air Brakes, Suspension, Cooling

Preventive Maintenance Plans

Fleet Maintenance Scheduling

What our Customers Say About A & F Truck Repair

FAQ's

Do You Still Have a Questions?

Do you offer fleet maintenance programs?

Yes, we customize service plans for any size fleet.

Can you handle engine rebuilds or major repairs?

Absolutely — full diagnostic and heavy-duty repair capability.

Do you work on-site?