Truck Repair Services in Glasgow, MT Thompson & Sons Inc.

Diesel trucks require expert care — and that’s what we deliver. Our technicians specialize in diagnostics, repair, and performance work for diesel-powered engines of all sizes. Whether you drive a single diesel pickup or manage an entire fleet, we’ll help keep your powertrain running clean, cool, and strong.

We handle everything from oil changes and filter replacements to turbocharger diagnostics, emissions service, and complete overhauls.

Shifting issues, fluid leaks, slipping gears, or full transmission failure — our shop is equipped to diagnose and repair all transmission problems. We work on both manual and automatic systems in commercial and heavy-duty trucks.



From clutch adjustments to complete transmission rebuilds, we help you get back on the road with smooth, reliable shifting.

Your suspension system plays a critical role in safety and drivability. If you’re experiencing uneven tire wear, steering problems, or a rough ride, we offer fast, accurate suspension diagnostics and repair.

Our team repairs shocks, struts, springs, bushings, and steering components to ensure a smoother ride and safer handling.

Your engine is the heart of your truck — and we don’t take shortcuts when it comes to keeping it in top shape. We offer complete engine diagnostics using advanced scan tools, along with professional-grade repair solutions.



From fuel injectors and cooling systems to head gaskets and rebuilds, our technicians fix engine issues the right way, the first time.

Stay ahead of costly breakdowns with a regular maintenance schedule designed around your vehicle or fleet. Our shop offers full-service maintenance for diesel trucks and commercial fleets, including:

• Oil and filter changes
  
• Brake inspections
  
• DOT compliance checks
  
• Fluid flushes
  
• Tire rotation and balancing
  
• Belt and hose replacements
  
  

We also offer customized fleet maintenance plans to keep your business on track without the stress of unexpected downtime.

Breakdowns happen — but you’re not on your own. Thompson & Sons Inc. provides 24-hour roadside assistance, heavy-duty towing, and emergency recovery for trucks and trailers throughout northeast Montana.

Whether you need a winch-out, a tire change, or a full tow, our crew is standing by to help. We also provide local and long-distance towing for semis, equipment, and work trucks.