Superior Service, Exceptional Results
GJH Motors has been able to service multiple locations with our trucks that are completely outfitted with tools, cranes, generators, welders, and parts. We are able to provide fast, dependable repairs that minimize downtime to maximize your productivity. Construction and industrial operations. In addition, our in-shop repair and maintenance facility located in Phoenix, Arizona for heavy & medium duty diesel trucks has skilled technicians equipped with state of the art diagnostic machines, lifts, and tools to perform necessary safety inspections and can give you a guaranteed reasonable repair estimate.
On-Site Heavy / Medium Construction Equipment Maintenance and Repair
GJH Motors provides reliable, on-site preventative maintenance and repair of heavy/ medium equipment from various manufacturers, including (but not limited to) Caterpillar, John Deere, Hitachi, Bobcat, Peterbuilt, Kenworth, Freightliner, and Komatsu. Our goal is to give our customers the best value and workmanship while reducing downtime at a competitive rate.
Common "Break-Fix" Repairs
At GJH Motors, we understand the critical importance of keeping heavy and medium-duty equipment operating at peak performance. We understand that when heavy- and medium-duty equipment goes down, productivity goes with it. Our break-fix repair services are designed to deliver fast, reliable, and accurate solutions that get your machinery back in operation with minimal downtime. Services are triggered after a failure occurs ("break"), not before.
Here are a few examples of our "Break-Fix Repair Services:
• Brakes & Wheel-Ends: Brake shoes/pads, drums, slack adjusters, wheel seals
• Electrical: Alternators, starters, batteries, lighting repairs
• A/C and Heating: Compressor, condenser, Freon recharge, heater core
• Cooling System: Hoses, belts, water pumps, radiators
• Fuel System: Filter changes, minor leak repair
Emergency Services
When your heavy or medium-duty equipment fails unexpectedly, every minute counts. Our on-site mobile emergency roadside assistance services are built to respond fast, diagnose accurately, and deliver the repairs necessary to get you moving again—right where you are.
Equipped with advanced diagnostic tools, fully stocked service trucks, and highly trained technicians, we provide immediate support for engine issues, electrical faults, hydraulic failures, air system problems, and other critical breakdowns. Whether you're on the highway, at a job site, or in remote terrain, we bring the shop to you.
Our goal is simple: reduce downtime, restore safety, and keep your operation on schedule. With 24/7 availability, transparent communication, and a commitment to reliable workmanship, we ensure your equipment receives expert care when you need it most.
When breakdowns happen, trust our mobile emergency service to deliver quick, capable, and dependable repairs—anytime, anywhere.
Advanced Diagnostics
Our advanced diagnostic services for heavy and medium-duty equipment are engineered to identify issues with precision—before they become costly failures. Using cutting-edge diagnostic software, OEM-level tools, and expert technician insight, we pinpoint problems across engine systems, hydraulics, electrical networks, emissions controls, driveline components, and more.
From intermittent faults to complex performance issues, our team delivers accurate, data-driven assessments that eliminate guesswork and reduce downtime. With comprehensive reporting, transparent communication, and a solutions-first approach, we help you understand what’s happening, why it’s happening, and the most effective path to repair.
Major Component Repair
Our fleet and maintenance service specializes in comprehensive repair and maintenance for construction equipment, keeping your machinery in peak working condition. From routine servicing to complex diagnostics and repairs, our skilled technicians ensure your equipment operates efficiently and reliably, we help keep your projects running smoothly and your equipment ready for the toughest tasks. We also offer fleet and maintenance service for diesel vehicles, ensuring optimal performance, reliability, and reduced downtime. Our experienced technicians use advanced tools and high-quality parts to deliver timely and cost-effective solutions tailored to your business. GJH Motors will maximize your fleet’s lifespan and minimize disruptions, so you can stay focused on your operations with confidence.
Who We Are
About GJH Motors
GJH Motors, headquartered in Phoenix, Arizona, services on-site heavy & medium duty construction equipment repairs and maintenance - specializing and certified to service highway construction equipment, mobile oil & lube service for heavy & medium duty equipment, in- shop diesel engine & transmission repairs, and also mobile heavy & medium duty diesel repair and maintenance services.
2016
Year of Establishment
1300+
Repair Orders Completed
5+
Professional Technicians
10+
Business Partners
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Jeremiah & Sylvia Smith
Founders and CEO, GJH Motors LLC
Our Services
We Offer a Range of Mobile and In-Shop Services
Our team of experienced and certified technicians is always ready to help you with your equipment repair and maintenance needs. We use state-of-the-art tools and equipment to ensure that your equipment is back up and running as soon as possible.
Our Work
Recent Work
At GJH Motors LLC, we take pride in our work and are committed to providing high-quality repair and maintenance services for heavy and medium-duty equipment throughout the valley and beyond. Here is some of our recent work.
Contractual Clients
Building Together, Thriving Together
Certifications
Elevating Standards, Empowering Success
