Our Truck & Trailer Repair Services
Professional 24/7 truck and trailer repair services to keep you moving. From emergency roadside assistance to preventive maintenance, our ASE certified diesel mechanics deliver reliable repair services for semi trucks, trailers, and commercial vehicles throughout Arizona, Nevada, and California.
Expert Diagnostics & Repair
Our ASE certified technicians use state-of-the-art computer diagnostics equipment to accurately diagnose and repair all types of truck and trailer issues. From brake systems and suspension repair to electrical problems and diesel engine troubleshooting, we have the expertise to get you back on the road quickly and safely.
We specialize in semi truck repair, trailer repair, and full diesel repair for commercial vehicles of all makes and models including Class 8 over-the-road trucks and regional delivery vehicles. Whether your rig needs emergency roadside assistance or scheduled preventive maintenance, our mobile service units carry the parts, tools, and diagnostic equipment to handle repairs on-site. Our technicians are trained to work on Freightliner, Peterbilt, Kenworth, Volvo, International, Mack, and all other major truck brands. CDL drivers and owner-operators depend on our fast turnaround to stay compliant with hours of service regulations and avoid out-of-service orders.
As a trusted repair services provider in Kingman AZ, we offer transparent pricing and a 90-day workmanship guarantee on every repair. From check engine light diagnostics to complete diesel engine overhauls, trust the team that has serviced over 1,200 commercial vehicles and counting.
Our Complete Repair Services
From emergency roadside assistance to preventive maintenance, we offer every repair service your semi truck, trailer, or commercial vehicle needs.
Detailed Breakdown of Our Truck & Trailer Repair Services
Diesel Engine Repair & Diagnostics
Our diesel mechanics are factory-trained on Cummins, Detroit Diesel, CAT, PACCAR, and Navistar engines. We perform complete diesel repair including injector replacement, turbocharger service, EGR valve repair, DPF regeneration and cleaning, SCR (selective catalytic reduction) system service, aftertreatment diagnostics, coolant system repair, and full engine overhauls. Using advanced computer diagnostics, we accurately pinpoint check engine light codes, emission faults, and performance issues. We also troubleshoot DEF (diesel exhaust fluid) system faults, ELD integration issues, and emission-related check engine codes that can trigger out-of-service orders at weigh stations. Whether your semi truck needs a roadside diesel repair or a scheduled engine service at our Kingman AZ facility, our ASE certified technicians deliver quality work backed by our 90-day guarantee.
Brake & Suspension Service
Brake failure on a loaded semi truck is dangerous and can result in DOT violations, fines, and out-of-service orders. Proper brake maintenance directly impacts your CSA (Compliance, Safety, Accountability) score and determines whether you pass or fail DOT roadside inspections and pre-trip inspections. Our technicians perform complete brake repair for air brake systems, disc brakes, and drum brakes on semi trucks, trailers, and commercial vehicles. We replace brake shoes, drums, rotors, slack adjusters, air chambers, and brake valves. Our suspension repair services include air ride suspension, leaf spring replacement, shock absorber service, alignment, and fifth wheel adjustments. Every brake repair meets or exceeds DOT and FMCSA standards to keep you safe and compliant on the road.
Tire Repair & Roadside Tire Service
Tire blowouts are one of the most common reasons truckers call for roadside assistance. Our mobile service units carry tire repair equipment, plugs, patches, and replacement tires for semi trucks and trailers. We handle emergency tire repair, tire replacement, tire pressure monitoring, and wheel seal service. Our technicians respond quickly to tire emergencies on I-40, US-93, and I-15, getting you back on the road safely. We also offer fleet tire programs to help you manage tire maintenance and reduce blowout risk through regular inspections and preventive tire service. For fleet operators, we track tire data to help reduce your cost-per-mile and improve your CSA safety scores.
Trailer Repair & Mobile Welding
Our trailer repair services cover structural repairs, mobile welding, landing gear repair, glad hand replacement, air line repair, door adjustments, roof repairs, and floor replacements for flatbeds, dry vans, reefers, and specialty trailers. We work on flatbed trailers, dry vans, reefer units, tanker trailers, lowboys, and step decks. Our welders are certified for structural and cosmetic trailer repair, and our mobile welding capability allows us to perform trailer repairs roadside so you don't need to be towed. We also handle trailer lighting and electrical repairs, air line replacement, and kingpin inspection. For fleet operators, we provide scheduled trailer maintenance programs that include DOT annual inspections and preventive trailer repair to catch issues before they cause breakdowns.
Electrical & Lighting Systems
Electrical problems can sideline a semi truck or trailer and create serious safety hazards. Our technicians diagnose and repair wiring issues, alternator failures, starter motor problems, battery replacements, and complete lighting system repairs. We ensure your truck and trailer meet DOT lighting requirements including headlights, tail lights, marker lights, clearance lights, and reflective tape. We also service ELD (electronic logging device) power connections and ABS (anti-lock braking system) sensor diagnostics. Our computer diagnostics equipment allows us to trace electrical faults quickly and accurately, reducing your diagnostic time and repair costs.
Hydraulic System & Specialty Repair
We service hydraulic systems on dump trucks, lift gates, rolloff containers, and specialty commercial equipment including refuse trucks, concrete mixers, and vacuum tankers. Our hydraulic repair services include hose fabrication and replacement, cylinder rebuilds, pump repair, valve replacement, and complete hydraulic system diagnostics. We also handle load shifts and cargo re-securement, fuel delivery for diesel and DEF fluid, and towing coordination when on-site repair isn't possible. Our comprehensive repair services make us a one-stop service provider for every type of semi truck, trailer, bus repair, RV repair, box truck service, straight truck maintenance, and commercial vehicle service need.
Emergency Roadside Assistance for Semi Trucks & Commercial Vehicles
When your semi truck or commercial vehicle breaks down on the highway, every minute counts. Weldon's Truck & Trailer provides 24/7 emergency roadside assistance across a 200-mile radius from Kingman, AZ. Our fully equipped mobile service trucks carry the parts and tools needed to perform most roadside repairs on-site, minimizing your downtime and getting you back on the road fast.
Our emergency roadside assistance covers a wide range of services including diesel repair, tire repair and blowouts, brake repair, electrical troubleshooting, air system leaks, mobile welding, fuel delivery, and towing coordination. Whether you're hauling freight on I-40, delivering to Las Vegas on I-15, or traveling US-93, our technicians can reach you quickly. We also provide emergency roadside assistance for RV repair, bus repair, and specialty commercial vehicles.
Fleet managers rely on our roadside assistance because we understand the urgency. A stranded semi truck means lost revenue, delayed deliveries, and driver frustration. Our dispatch team coordinates every detail — from diagnosing the problem over the phone to dispatching the right technician with the right parts. We provide towing coordination when on-site repair isn't possible, and we work directly with your fleet management and dispatch teams. Our roadside assistance is the most trusted emergency service provider in the Kingman AZ region.
We handle load shifts and cargo re-securement, fuel delivery for diesel and DEF, mobile welding for trailer structural repairs, and complete roadside brake service. Our emergency roadside assistance team has helped over 1,200 trucks get back on the road, and our average response time is under 60 minutes in the Kingman area. For locations like Las Vegas, Bullhead City, and Flagstaff, we typically arrive within 90-120 minutes.
60-Min Response
In the Kingman area
On-Site Repair
Most repairs done roadside
All Vehicles
Semi trucks, trailers, RVs, buses
200-Mile Radius
AZ, NV, CA coverage
Preventative Maintenance & Fleet Services
Preventative maintenance is the key to keeping your semi trucks and trailers on the road and avoiding costly emergency breakdowns. At Weldon's Truck & Trailer, our diesel mechanics offer comprehensive preventative maintenance programs designed for fleet operators, owner-operators, and commercial vehicle owners. Regular preventative maintenance reduces unexpected downtime, extends the life of your diesel engine, and keeps your vehicles DOT compliant.
Our preventative maintenance services include oil and filter changes, brake inspections, tire rotations, fluid checks, transmission service, differential service, belt and hose inspections, air system testing, electrical system checks, and complete DOT annual inspections. Our maintenance programs help protect your CSA score by keeping all safety-critical systems — brakes, tires, lights, and coupling devices — in DOT-compliant condition. We work with fleet managers to create customized preventative maintenance schedules based on your vehicle usage, mileage, and manufacturer recommendations. Our diesel mechanics document every service, so you always have complete maintenance records for your fleet.
As a dedicated fleet service provider, we offer on-site preventative maintenance at your yard or terminal. Our mobile service trucks come to you, so your semi trucks and trailers stay productive instead of sitting in a shop. We service all major diesel engine brands including Cummins, Detroit Diesel, CAT, PACCAR, and Navistar. Whether you operate two trucks or two hundred, our preventative maintenance programs help you reduce repair costs and keep your fleet rolling safely.
We provide pre-trip and post-trip inspection support and documentation to help CDL drivers meet FMCSA requirements. Our fleet services also include DOT annual inspections, roadside compliance checks, and emergency roadside assistance priority dispatching for fleet customers. We understand that commercial vehicles are the lifeblood of your business, and our preventative maintenance programs are designed to maximize uptime, reduce unexpected repair costs, and keep your drivers safe on the road. Contact us to discuss customized preventative maintenance plans for your fleet of semi trucks, trailers, buses, or commercial vehicles.
Why Choose Our Emergency Roadside Truck Service
When you need emergency roadside assistance for your semi truck or trailer, choosing the right service provider matters. Here's why fleet managers and truck drivers across the Southwest trust Weldon's Truck & Trailer for reliable roadside assistance and repair services.
ASE Certified Technicians
Every technician on our team is ASE certified with extensive experience in semi truck repair, diesel repair, and trailer repair. We invest in ongoing training to stay current with the latest commercial vehicle technology and diagnostic equipment.
Fast Response Times
Our emergency roadside assistance team responds within 60 minutes in the Kingman AZ area and 90-120 minutes to Las Vegas, Bullhead City, Flagstaff, and surrounding locations. We dispatch the closest available mobile service unit to minimize your wait time.
Competitive & Transparent Pricing
We provide upfront quotes before starting any repair. No hidden fees, no surprise charges. Our competitive pricing and transparent billing have earned us the trust of fleet operators and owner-operators across the region.
All Makes & Models
We service every brand of semi truck, trailer, and commercial vehicle including Freightliner, Peterbilt, Kenworth, Volvo, International, and Mack. From diesel engines to trailer repairs, bus repair to RV repair, we handle it all.
200-Mile Service Area
From our base in Kingman AZ, we provide roadside assistance and mobile repair services throughout Arizona, Nevada, and California. Our service area includes Las Vegas, Phoenix, Flagstaff, Bullhead City, Needles, and all points along I-40 and I-15.
90-Day Workmanship Guarantee
We stand behind every repair with a 90-day workmanship guarantee. If a repair we performed doesn't hold up, we'll make it right at no additional cost. Your satisfaction and road safety are our top priorities.
Service Areas We Cover
Our emergency roadside assistance and mobile truck repair services cover a 200-mile radius from Kingman, AZ. We provide semi truck repair, trailer repair, diesel repair, and roadside assistance throughout Arizona, Nevada, and California.
As the premier mobile truck repair service provider in the Southwest, we respond to calls along I-40, I-15, US-93, and US-95. Our fleet of fully-equipped mobile service trucks can reach your location quickly, whether you're near Las Vegas, Flagstaff, Bullhead City, Phoenix, or anywhere in our extensive service area. Fleet managers and owner-operators throughout the region count on our roadside assistance to minimize downtime and keep their semi trucks and commercial vehicles running.
Need Emergency Roadside Assistance?
Our expert technicians are available 24/7 to help you get back on the road. Whether you need diesel repair, tire service, trailer repair, or any other emergency roadside assistance, call us now for fast, reliable service.
From semi truck breakdowns on I-40 to trailer repair near Las Vegas, our ASE certified mobile service team provides roadside assistance throughout Kingman AZ, Bullhead City, Flagstaff, Henderson, and the entire Southwest. We are your trusted service provider for 24/7 emergency roadside truck and trailer repair.