Heavy Duty Truck Repair in Bethany, MO
Power, Performance,
and Reliability — Repaired Right
At Guernsey’s Truck Trailer and Tire Service, we deliver expert heavy duty truck repair to keep your fleet or rig operating at full power. From engine diagnostics to driveline overhauls, we understand the complexity of modern diesel systems and the urgency of getting your truck back on the road.

With more than two decades of experience and 24-hour weekday service, our team handles even the toughest repairs with speed and precision. Located in Bethany, MO, we proudly serve truckers within a 250-mile radius.
Full-Service Heavy Duty Truck Repairs
We’re equipped to manage every core system in your heavy-duty truck. Whether it’s a routine issue or a complex failure, we’ll restore performance, fuel efficiency, and safety.
Our Services Include:
- Diesel engine diagnostics and rebuilds
- Cooling system and radiator repairs
- Oil leaks and turbocharger issues
- Transmission and clutch repairs
- Electrical and sensor troubleshooting
- Air brake service and repair
- Exhaust systems and emissions compliance
We service all major makes and models, including Freightliner, Peterbilt, Kenworth, Volvo, International, and Mack.
Our Services Include:
- Diesel engine diagnostics and rebuilds
- Cooling system and radiator repairs
- Oil leaks and turbocharger issues
- Transmission and clutch repairs
- Electrical and sensor troubleshooting
- Air brake service and repair
- Exhaust systems and emissions compliance
We service all major makes and models, including Freightliner, Peterbilt, Kenworth, Volvo, International, and Mack.
Skilled Diesel Mechanics, Fast Turnaround
We know that every hour off the road is money lost. That’s why our seasoned diesel technicians combine deep mechanical knowledge with modern diagnostic equipment to find and fix issues fast — without cutting corners.
Our goal is to get you back on the road safely and reliably with the fewest delays possible.
Mobile Heavy Duty Repair Services
Breakdowns rarely happen where it’s convenient. Our mobile service unit brings heavy duty repair directly to your site — with no mileage limits. Whether you're on the interstate, at a job site, or in a staging yard, we’ll get there fast.
Mobile heavy duty truck repairs include:
- On-site engine diagnostics
- Emergency cooling system service
- Roadside electrical and starter repairs
- Brake system inspections and fixes
- Fuel delivery and line issues
24/7 Expert Repairs
Around-the-clock service Monday–Friday for trucks, trailers & heavy-duty equipment — minimizing your downtime, maximizing your uptime.
Why Guernsey’s Is the Right Choice
20+ years of diesel repair experience
Service designed for commercial truckers and fleets
Reliable repairs backed by high-performance parts
Clear communication and honest diagnostics
Open 24 hours Monday through Friday
Trusted by truckers across Missouri and surrounding state
FAQs About Heavy Duty Truck Repair
What types of heavy trucks do you service?
We work on all major brands of heavy-duty trucks and semi-trucks, including Class 7 and 8 vehicles.
Do you rebuild engines?
Yes, we offer full diesel engine rebuilds and performance upgrades.
Are mobile repairs available for heavy-duty systems?
Yes. Our mobile unit is equipped to handle many heavy-duty repairs on-site.
Can you service fleet trucks?
Absolutely. We provide consistent, quality repairs for individual operators and fleet clients alike.
Contact Us for Heavy Duty Repairs Today
Need expert repair for your heavy-duty truck? Call Guernsey’s Truck Trailer and Tire Service.
Phone: (660) 373-2178
Email: guernseytruck@gmail.com
Location: 25773 West US Route 69, Bethany, MO 64424
We’re here to keep your truck running strong.
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