Truck Maintenance in Glasgow, MT
Preventive Maintenance That Keeps Your Truck on the Road
Staying ahead of costly breakdowns starts with one thing: proper maintenance. At Thompson & Sons Inc. in Glasgow, MT, we provide reliable and thorough truck maintenance services designed to keep diesel, semi, and heavy-duty trucks performing at their best. Whether you own one truck or manage a full fleet, our scheduled maintenance programs help you avoid unexpected repairs, extend equipment life, and reduce downtime.

We know how much your business depends on your vehicles. Our team works quickly and accurately, making sure every maintenance job supports the long-term performance, safety, and reliability of your rig.
Full Service Diesel and Truck Maintenance
Our facility is equipped to handle all routine and preventive maintenance needs for diesel trucks, semis, and commercial vehicles. We service all makes and models and work with both owner-operators and fleet managers.
Truck maintenance services include:
Oil and filter changes
Air and fuel filter replacement
Brake inspections and adjustments
Fluid level checks and flushes
Battery inspection and testing
Belt and hose inspection
Coolant system maintenance
Steering and suspension checks
Exhaust system inspections
Light and electrical system tests
Tire pressure and tread checks
These services help prevent engine strain, reduce fuel consumption, and avoid compliance issues on the road.
Custom Maintenance Schedules
No two trucks are exactly alike — that’s why we build maintenance plans based on your truck’s use, mileage, and working conditions. Whether you’re hauling cross-country or working local construction routes, our team will create a service schedule tailored to your needs.
We track your intervals, monitor wear trends, and recommend services based on manufacturer specifications and real-world performance data.
Fleet Maintenance Programs
If your business relies on a fleet of trucks, staying organized with regular service is critical. Our fleet maintenance programs are built to support your daily operations and long-term equipment investments.

Fleet service benefits:
Customized service schedules
DOT inspection coordination
Centralized service history and records
Priority scheduling and faster turnaround
Scalable options for growing fleets
Clear communication with a single point of contact
We currently support local businesses, agricultural operations, and transportation companies across Valley County with fleet maintenance that’s proactive, not reactive.
DOT Inspections and Compliance Checks
In addition to routine maintenance, we offer DOT inspections and pre-trip compliance checks to help you stay safe and avoid violations on the road.

DOT-related services include:
Brake system inspection
Suspension and steering system checks
Lighting and electrical compliance
Tire and wheel condition assessments
Frame and undercarriage checks
Fuel and exhaust system inspection
We’ll alert you to any concerns before they become violations — helping you stay compliant, reduce liability, and keep your reputation intact.
Benefits of Preventive Truck Maintenance
Investing in routine maintenance isn’t just about ticking boxes — it’s about keeping your truck running reliably and safely every time you turn the key.
Benefits include:

- Reduced risk of breakdowns and roadside repairs
- Improved fuel efficiency
- Extended engine, brake, and transmission life
- Lower long-term repair costs
- Increased resale value of your truck or fleet
- Better compliance with DOT and safety regulations
- Safer operation for you and others on the road
Even simple services, when done consistently, can prevent thousands in repairs down the line.
Quick Turnaround and Transparent Service
At Thompson & Sons Inc., we know time is money. That’s why we work quickly, without sacrificing quality. Our shop is equipped for high-efficiency maintenance and staffed by trained diesel technicians who take pride in precision.
You’ll receive a clear estimate, an honest timeline, and updates throughout the process — no surprises, no pressure, and no unnecessary upsells.
Mobile Maintenance Available
Can’t bring your vehicle to the shop? We offer mobile truck maintenance for select services across northeast Montana. If you operate from a remote site or need help with basic upkeep in your yard, our mobile units can come to you.

Mobile maintenance services may include:
Oil and filter service
Battery replacement
Tire inflation and checks
Brake inspections
Fluid top-offs
Light diagnostics
Call to learn more about availability in your area.
Why Choose Thompson & Sons Inc.
Drivers and fleet operators across Glasgow and the surrounding region choose us because we deliver maintenance with integrity, speed, and long-term value.

Here’s what sets us apart:
Deep experience in diesel and heavy-duty systems
Honest recommendations and no guesswork
Personalized service plans based on your needs
Local, family-owned shop that puts customers first
Fast turnaround and flexible scheduling
Support for individuals and fleets alike
We understand what your truck means to your business — and we treat every job with the care it deserves.
Schedule Truck Maintenance Today
Routine maintenance is the easiest way to avoid expensive problems down the road. Whether you need a quick oil change, a seasonal service, or a full fleet program, Thompson & Sons Inc. is ready to help.
Call us to schedule service or discuss a long-term maintenance plan.
Phone:
(406) 228-4801
Email:
thompsonmandsons@nemont.net
Shop Address: 53997 Highway 2 West, Glasgow, MT 59230
Hours: Monday to Friday, 8 am – 12 pm and 1 pm – 5 pm
We’ll help keep your truck ready for whatever the road throws at it.