(406) 265-2105

Diesel Doctyor
3186 Hwy 2 East
Havre, MT

(406) 265-2105   REQUEST SERVICE

Our Services

Complete Diesel Repair & Maintenance Services in Havre, MT

At Diesel Doctor, Inc. in Havre, MT, our goal is to get you back on the road quickly with precise repairs and friendly, efficient service. We specialize in diesel engine repair and can service the following trucks: Kenworth, International, Peterbilt, Mack, Western Star, Volvo,  as well as transit buses, school buses, RV semi-trailers, tractors, and farming equipment. If you’re stuck in a bind and can’t make it to the shop, no problem! We offer 24-hour roadside assistance.

Schedule your appointment now!

Semi-Truck Repair

When it comes to your semi-truck, Diesel Doctor has the knowledge and technology required to repair the most advanced tractor-trailers on the road today. We understand you have a lot of money invested in your truck, and you want to keep it running at peak performance. Our shop is just the place to make sure your truck is running at the top of its game. We offer services from overhauls to alignments, transmissions to electrical repair, and we even have a truck and trailer wash bay.

Bus Repair

Schools on the highline count on us to maintain, service, and repair their school and charter busses.

Farm Equipment Service & Repair

Our diesel technicians don’t stop at trucks. We also service and repair all types of farming equipment, including tractors, combines, balers, seeders, and tillers. Many farmers and ranchers in the Havre area count on us to keep their equipment running strong in the field. Whether you’re having problems with your hydraulics, engine, or any other issue, we can help you get back to work in the shortest time possible.

DOT Inspections

Ensuring your truck is operating within federal CSA standards is an important part of owning and operating a truck. Our skilled diesel mechanics can keep you in compliance by ensuring all your truck’s systems are functioning properly. If we need to make a repair or perform a maintenance service for you to pass DOT Inspection, we’ll take care of what you need expertly and efficiently.

Air Conditioning & Heating

Your truck’s air conditioning and heating system is important for your comfort while driving, and, in some cases, your safety. When the weather gets severe, you may be reliant on your truck to keep you protected and secure for hours while you are on the road. Our technicians can diagnose and repair any issue you may be experiencing with your vehicle’s A/C or heat, whether you need a simple recharge or attention to your compressor, receiver, condenser, hoses, or electronic climate control units.

Emergency Repairs

We are here for any kind of trouble with your truck, RV, trailer, or equipment. We know your truck or equipment breaking down can be frustrating, and, even worse, it can leave you stranded, so we provide the best service we can to make you feel at ease during such a time. If you ever need emergency service call us. We’ll get you to our shop, repair your vehicle, and get you back on the road or back to work as soon as possible.


Our alignment professionals will ensure that your truck drives straight down the highway to ensure the safety of you and others on the road. Weather your truck is wandering, pulling to one side, or eating tires, we can diagnose the issue and align it to solve your problem.

Full List of Services

  • Diagnostics
  • Check Engine Lights
  • Starters
  • Alternators
  • Batteries
  • Fuel Injection Cleaning
  • Heating Systems
  • Radiators
  • Coolant/Antifreeze Flush
  • Water Pumps
  • Scheduled Maintenance
  • Suspension
  • Drive Axles
  • U-Joints
  • Oil Changes/Lube Service
  • Tune-ups
  • Fabrication
  • Welding
  • Trailer-truck Inspection Service
  • DOT Annual Inspection
  • Air Filter Replacement
  • A/C – Air Conditioning Repair
  • Brake Inspection, Service & Repair
  • Exhaust & Muffler Repair
  • Transmission Service & Repair
  • Diesel Engine Overhaul
  • Diesel Engine Repair
  • Trailer-truck Electrical Service
  • Trailer-truck Oil Change
  • Trailer-truck Tune-up
  • Trailer-truck Radiator Service
  • Trailer-truck Brake Service & Repair
  • Trailer-truck Exhaust & Muffler Service
  • Trailer-truck Transmission Service & Repair
  • Truck & Trailer Wash Bay
  • Truck Alignment System
  • Semi-Truck Repair
  • Farming Equipment Service & Repair
  • DOT Inspections
  • Air Conditioning & Heating
  • Emergency Repairs
Trucks We Service & Repair


Diesel Doctor, Inc.
3186 Hwy 2 East
Havre, MT
Get In Touch
(406) 265-2105