Business Details
50+ Years
experience
Emergency
services
Expert Truck Repair and Maintenance Services in Fitzwilliam, NH
State Line Truck Service has been a trusted name in truck repair and maintenance since 1975. Founded by Kendall 'Gus' Crocker on a MA dairy farm, our family-owned business evolved from a local parts shop into one of New England's most experienced truck service dealers. With four generations of family leadership, we combine decades of hands-on experience with cutting-edge technology like Josam laser alignments and computer diagnostics. Our commitment to honest service extends to comprehensive trailer work, frame rail installations, and a vast inventory of parts for all makes and models.We maintain a loyal team of technicians who uphold our core values of reliability and trust, serving customers across New England with 24/7 emergency support and competitive labor rates. From routine inspections to complex repairs, our focus remains on delivering solutions that keep commercial fleets operating at peak performance.
Services
Truck Alignments
Trailer Repairs
DOT Inspections
Frame Rail Installation
Parts Supply
Emergency Service
Seasonal Specials
Motorhome Service
Details
- Year established: 1975
Highlights and features
- Family-owned since 1975 with four generations of industry expertise
- 24/7 emergency service with certified technicians available
- Specialized in Mack frame rails and Josam laser alignments
- Comprehensive DOT and NH state inspection capabilities
- Maintain inventory of 10,000+ truck parts for immediate service
What people say
Great people to work with
Satisfaction Guaranteed
Excellent Belletetes Parts
No worry about repairs
Long standing relationship
Services
Truck Alignments
Our Josam laser alignment system ensures precise medium and heavy-duty truck alignments. Proper alignment prevents premature tire wear, improves fuel efficiency, and enhances vehicle safety through computer-aided diagnostics. Technicians address front-end components and rear axle U-bolts to maintain optimal performance standards.
Trailer Repairs
Comprehensive trailer maintenance includes brake relining, suspension repairs, and structural modifications. Our technicians handle king pin replacements, door/roof repairs, and DOT-compliant inspections using genuine Mack components for durability in commercial applications.
Parts Supply
We stock over 10,000 truck parts including Meritor brake components, Alcoa wheels, and Hendrickson lift axles. Our inventory covers hydraulic hoses, filters, and specialized equipment for immediate repairs on all commercial vehicle makes and models.
DOT Inspections
Certified technicians perform NH state, DOT, and overweight inspections meeting federal safety standards. Services include comprehensive brake checks, lighting system verification, and documentation for commercial fleet compliance.
Emergency Service
Available 24/7 for roadside assistance and urgent repairs. Our emergency team handles breakdowns with mobile diagnostic tools and provides temporary solutions to minimize downtime for commercial operations.
People
Kendall 'Gus' Crocker
Founder
Established State Line Truck Service in 1975 after founding KF Crocker Transportation. Transitioned from dairy farming to trucking industry, building the business into a regional service leader through hands-on expertise and customer focus.
Linda Crocker
Former Treasurer
Joined the business in 1978, managing office operations without computer systems. Served as Treasurer until her passing in 2017, establishing financial foundations that supported the company's 49-year growth trajectory.
Kelly Crocker
Owner
Daughter of Gus and Linda, joined in 1994 and purchased the company in 2007. Continues family legacy through strategic investments in technology while maintaining core values of personalized service and community relationships.
Questions
What types of trucks do you service?
We service all commercial truck makes and models including Mack, Freightliner, Kenworth, and Peterbilt with specialized parts and repair capabilities.
Do you offer 24/7 emergency service?
Yes, our emergency service team responds 24/7 with technicians available for roadside assistance and urgent repairs at $225/hour.
What inspection services are available?
We provide NH state inspections, DOT compliance checks, and overweight permit services meeting federal and state regulatory requirements.
Are parts warranties included?
Warranty rates start at $125.85/hour. Specific component warranties apply to genuine Mack parts and manufacturer-certified replacements we install.
How are labor charges calculated?
Standard labor rates range from $145–$225/hour depending on service type. No overtime charges apply for weekday or Saturday work.
Reviews (4)
Shelly Heist
Apr 18, 2021
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They are wonderful! Not only did they have the parts we needed, they also took time to trouble shoot the problem I'm having. Great people. Recommend them highly.
Kevin Weed
Dec 02, 2020
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When finding a good truck service while traveling the country can be a challenge. So glad I found this place as they tacked several items of differed maintenance, including oil & air leaks, 6 new tires, an alignment and numerous other issues. Although the repairs ended up adding up to quite a bit, so far I see all of the work was done professionally and throughly. Any problems were addressed promptly
Chuck Partain
May 17, 2020
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If you have a MACK! this is a great place to go, they have parts and can get parts! Clean, professional folks.
Mobile Repair Solutions Llc
May 31, 2019
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I called today for a simple question about a truck for a starter enable relay and they were very helpful and gave me information and time that they didn't have to. First class
