Heavy-Duty Truck and Trailer

Whether you own a trucking fleet, are an owner-operator, we are here to help. We service trailer at your location, with discounts if you sign up for our fleet services program. Our local service area includes Buchanan, Niles, St. Joseph, Benton Harbor, Dowagiac, Mishawaka, and South Bend.

Diesel Pickup Trucks

We service domestic diesel pickups such as Ford, GMC/Chevy, Dodge Ram. Need to stud your 6.0? Injector issues with you Duramax? Exhaust gasket on a Cummins? We are here to help.

General Automotive

We specialize in major repairs such as engine or transmission replacement, driveline issues, repairing electrical damage, or minivan repairs nobody else wants to touch.

Fully licensed and insured

Service by Appointment Only

Transparent billing with no surprises

Call 269-371-2001

Our Services

  • Heavy Duty Truck and Trailer

    From DOT inspections, brakes, running gear, driveline or air system work, we are dedicated to keeping Michiana moving.

  • Diesel Pickup Trucks

    Experienced local repair and maintenance solutions for diesel pickup trucks from our experienced technicians.

  • Automotive

    From engine troubles to brake problems, we've got you covered. Trust us to provide expert solutions for all your automotive needs.

  • Onsite Service

    Keep your trucks and trailers performing at their best with our onsite servicing. Our team will take care of all your heavy duty maintenance and inspection needs at your own location.

  • Fleet Services

    Experience worry-free operations with our reliable preventive maintenance services for trailer fleets. We prioritize safety and efficiency.

  • Performance Parts Network

    Find truck, trailer and automotive parts, plus aftermarket performance upgrades at great prices. Ask us to find you the best deals.

We are Buchanan Diesel

Founded in 2021, Buchanan Diesel began as a partnership between Robert, with over 25 years experience as a master heavy-duty mechanic, and Carl who had always dreamt of running a repair shop that would treat employees well and customers with respect.

Soon after incorporating and getting our Michigan repair facility license, we began to grow. Today we have three service bays, two service trucks and four fulltime technicians ready to assist our customers.

If you need a mechanic or are a mechanic yourself and are looking for work give us a call!

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