Semi Truck Repair in Bethany, MO
Fast, Reliable Service to Keep You Rolling
Guernsey’s Truck Trailer and Tire Service offers trusted semi truck repair to drivers and fleet managers throughout the Midwest. Located in Bethany, MO, we service rigs from all over Missouri and beyond — up to 250 miles out. With 24-hour weekday availability and more than 20 years of experience, we’re known for our no-nonsense approach to keeping big rigs running strong.

Whether you need brake work, transmission service, or electrical diagnostics, our team is ready to get you back on the road fast.
Full-Service Semi Truck Repair
Our shop is equipped to handle every major system on your semi truck. We combine old-school mechanical know-how with modern diagnostic tools to provide efficient, long-lasting repairs.
Common Repairs We Handle:
- Engine troubleshooting and performance issues
- Starter and alternator replacements
- Clutch and transmission service
- Brake system repairs (air and hydraulic)
- Suspension and steering repairs
- Oil leaks, coolant issues, and overheating
- DEF systems and emissions troubleshooting
We work on all major manufacturers, including Freightliner, Kenworth, Peterbilt, Mack, Volvo, International, and others.
Common Repairs We Handle:
- Engine troubleshooting and performance issues
- Starter and alternator replacements
- Clutch and transmission service
- Brake system repairs (air and hydraulic)
- Suspension and steering repairs
- Oil leaks, coolant issues, and overheating
- DEF systems and emissions troubleshooting
We work on all major manufacturers, including Freightliner, Kenworth, Peterbilt, Mack, Volvo, International, and others.
Supporting Independent Drivers and Fleets
We serve both owner-operators and commercial fleet managers who rely on us for dependable, fast service. Whether it’s a one-time emergency or ongoing maintenance support, Guernsey’s delivers. Our commitment is to keep your business moving.
Mobile Repairs with No Mileage Limits
Stuck on the highway? Parked at a rest stop or a dock? Our mobile repair team will come to you — anywhere within 250 miles of Bethany. We provide roadside semi truck repairs that save you time and avoid costly tows.
Our mobile services include:
- Battery and starter replacements
- Brake line leaks and air system repairs
- On-site diagnostics and troubleshooting
- Quick fluid service and refills
24/7 Expert Repairs
Around-the-clock service Monday–Friday for trucks, trailers & heavy-duty equipment — minimizing your downtime, maximizing your uptime.
Why Truckers Trust Guernsey’s
Over 20 years of semi truck repair experience
24-hour weekday availability
Mobile service with no mileage restrictions
Skilled technicians and in-stock parts
Fast diagnostics and honest advice
Central location with easy access to major highways
FAQs About Semi Truck Repair
Do you repair all models of semi trucks?
Yes, we service all major makes and models, including diesel and hybrid units.
Can I call for a roadside repair?
Yes. We offer mobile semi truck repairs across a 250-mile range, no tow required.
How quickly can you get me back on the road?
Most diagnostics are completed same-day, and repairs begin as soon as parts are available.
Do you offer emissions and DEF system repairs?
Yes. We handle full emissions and DEF system diagnostics and repair.
Schedule Semi Truck Repair Today
Call Guernsey’s Truck Trailer and Tire Service for expert repairs done fast and done right.
Phone: (660) 373-2178
Email: guernseytruck@gmail.com
Location: 25773 West US Route 69, Bethany, MO 64424
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