What We Do

Upper Michigan Diesel is a full-service diesel and auto repair shop based in Big Bay, Michigan, proudly serving both everyday drivers and heavy equipment operators across the Upper Peninsula. We offer comprehensive repair services, custom metal fabrication, and welding solutions tailored to trucks, off-road vehicles, industrial machinery, and mining equipment.

From engine diagnostics to structural welding, we’re equipped to handle the toughest jobs — in-shop or out in the field.

We’re also partnered with a mine maintenance contractor specializing in full equipment rebuilds and shafting equipment support, giving us direct access to resources, tools, and expertise critical to underground operations.

• Diesel Repair & Service
   
  • Engine diagnostics, fuel systems, drivetrains, cooling systems
     
  • Light-duty, heavy-duty, and off-road vehicle support
     
• Auto Repair & Maintenance
   
  •  From diagnostics to major repairs – we handle oil changes, brakes, tires, and full engine work.
    We also service snowmobiles, ATVs, and boats.
     
• Custom Welding & Fabrication
   
  • Aluminum, steel, and cast welding
     
  • Structural repairs, bracket fabrication, modifications
     
  • Onsite welding and emergency mobile repair service
     
• Mining Support & Equipment Repair
   
  • Partnered with a mine maintenance contractor -- Quality Mechanical Repair LLC  
  •                                Home | Quality Mechanical Repair LLC
     
  • Specializing in rebuilds, worn component replacement, and shafting equipment service
     
  • Field-tested knowledge of mining environments and equipment standards
     

Whether you’re managing a fleet or bringing in your personal rig, Upper Michigan Diesel combines small-town service with heavy-industry experience to deliver results that last — above or below ground.

4 guys 16 days total