Diesel Repair Services
NoCo Diesel Services LLC
Welcome
Full-Service Mobile Diesel Repair for Trucks, Trailers, Equipment, and Fleets
NoCo Diesel Services LLC provides professional, 24/7 mobile diesel repair for heavy-duty trucks, trailers, and equipment across Colorado, Wyoming, and Nebraska. Based in Johnstown, Colorado, we bring dealership-level knowledge and certified diagnostics to your location, helping you avoid costly downtime and unnecessary towing.
We work directly with fleet operators, owner-operators, and equipment managers to solve mechanical problems on-site and on time. From emergency roadside service to scheduled fleet maintenance, our services are built around speed, accuracy, and long-term reliability.
Our Mobile Diesel Repair Services
Explore our core service categories below. Each service is performed by a trained diesel technician with over 15 years of industry experience.
Mobile Diesel Repair (Roadside)
Our mobile diesel service trucks are ready 24/7 to handle roadside breakdowns. We respond quickly to no-starts, breakdowns, warning lights, and mechanical failures. With diagnostic tools and parts on hand, we handle most repairs on-site.
Semi-Truck Repair
We provide in-field repairs for Class 7 and 8 trucks, including engine diagnostics, electrical issues, brake systems, aftertreatment problems, and more. We work on all makes and models and follow manufacturer-level procedures.
Trailer Repair
We repair flatbeds, dry vans, reefer trailers, and heavy-duty utility trailers. Common repairs include lights, wiring, brakes, suspension, and axle components. We also service lift gates and perform DOT inspections.
DOT Inspections (Mobile)
DOT due? We’re certified to perform mobile DOT inspections on trucks and trailers. We offer inspection services at your location to reduce downtime and help ensure compliance.
DPF / SCR Regen and Aftertreatment
We provide on-site forced regens, SCR system diagnostics, and DPF troubleshooting. If you're getting derate warnings or system errors, we can help clear codes and perform necessary service.
Diesel Diagnostics (Check Engine)
We use advanced scan tools and dealer-level software to identify check engine codes, no-start issues, sensor faults, and drivability concerns.
Brake and Air Brake Systems
We repair and replace air brake parts and provide ABS diagnostics, adjustments, and leak detection for safe, compliant operation.
Electrical and Lighting Repair
From dead batteries and wiring issues to shorts, blown fuses, and lighting system failures, we troubleshoot diesel electrical systems quickly.
Wheel Seals and Hub Components
We replace leaking wheel seals and inspect hub assemblies on trucks, trailers, and equipment. Proper repair protects your axles and prevents costly breakdowns on the road.
Preventive Maintenance (A & B Services)
We offer complete A and B services based on OEM guidelines. Services include oil and filter changes, inspections, fluid top-offs, air filter replacement, and system checks. PMs can be scheduled on your site or integrated into a fleet maintenance program.
Heavy Equipment Repair
We provide on-site repair for diesel-powered construction and industrial equipment, including loaders, excavators, generators, and agriculture machinery. Services include diagnostics, fluid service, hose repairs, and electrical troubleshooting.
Fleet Maintenance Programs
We partner with businesses to develop structured fleet maintenance programs. Our plans include scheduled PMs, DOT tracking, repair logs, and compliance inspections to improve uptime and reduce operating costs.
Generator Service
Need your generator running reliably? We perform diagnostics, maintenance, and repairs on mobile and stationary diesel generators for job sites, trailers, and critical equipment.
Tire Service
We offer tire replacements and assistance for heavy-duty trucks and trailers during mobile calls. Our technicians can inspect tread, repair punctures, and install new tires when needed.
Air Line Repairs
Air leaks, fitting failures, and line damage can sideline your truck fast. We locate and fix airline issues in the field to get you moving again safely and quickly.
Mobile Service Coverage
We proudly serve drivers, fleets, and businesses throughout:
Greeley, CO
Fort Collins, CO
Longmont, CO
Loveland, CO
Wellington, CO
Meade, CO
Johnstown, CO
Arvada, CO
Thornton, CO
Westminster, CO
Commerce City, CO
Brighton, CO
Aurora, CO
Lakewood, CO
Castle Rock, CO
Denver Tech Center, CO
Bontree, CO
Vail, CO
Colorado Springs, CO
Cheyenne, WY
Contact Us to Schedule Service
Have an emergency breakdown or need scheduled maintenance? NoCo Diesel Services LLC is available 24/7 for mobile repair, inspections, and diagnostics. Contact us anytime to request a callback, get a quote, or speak directly with a technician.