24 Hr. Roadside Emergency (705) 698-5134

Electronic Software Updates

Heating & Air Conditioning

After Treatment

SCR Emissions Systems

Engine Rebuilds

Electrical Diagnostics

Our Services

Serving Sudbury for over 30 years; we’re committed to delivering quality service to our customers, their vehicles and the environment. 

Here at Elroi’s it is our top priority to ensure customer satisfaction and of course ensuring your vehicles are always road ready. Check out our list of available services.


Prevent electrical system malfunctions in your vehicle by having one of our trained technitions service and repair the alternators, batteries, and starters. Electrical diagnostics testing in its most stripped down form is the act of applying voltage or a current to a circuit with the intent of comparing the measured value to a desired result. It is the job of our testing technicians to know which piece of test equipment to use for the task at hand and also understand the limitations of the test equipment they are using.


Our heavy-duty mechanic services include repair/rebuilding of the engine, cylinder blocks, cylinder heads, and transmission among other parts and pieces, with the intent to help your diesel engine last longer. There can be multiple problems that arise, causing the need for an engine rebuild, whatever the problems may be it is important to have them addressed immediately. Otherwise, an easily fixable problem like an oil leak or overheating can morph into something permanent, causing irreversible damage.


SCR technology is one of the most cost-effective and fuel-efficient technologies available currently, it helps reduce diesel engine emissions. It allows diesel engines to be tuned and tailored toward maximum fuel efficiency, while effectively treating the engine-out exhaust. Selective Catalytic Reduction (SCR) is a proven, active emissions control technology system that injects a liquid-reductant through a special catalyst into the exhaust stream of a diesel engine. Otherwise known as Diesel Exhaust Fluid (DEF), The DEF Diesel sets off a chemical reaction that converts nitrogen oxides into nitrogen, water, and tiny amounts of carbon dioxide (CO2); components of the air we breathe, which is then expelled out the vehicles exhaust pipe.


Trucks are complex pieces of machinery with a catalog of components working in tandem to create an efficient, safe and clean vehicle. The aftertreatment system, or ATS, is one very important part of any truck. What is an after treatment system? It is a series of components which clean the diesel exhaust emitted by the engine prior to its journey through the tailpipe to the outside air. Its main purpose is to cut back the emission of possibly harmful pollutants into the environment.


Heating, ventilation, and air conditioning is the technology of indoor and vehicular environmental comfort, with the goal of providing the vehicle owner with thermal comfort and adjustable air quality and temperature at their fingertips. Heating and cooling systems may begin to fail overtime with heavy use. Hose pipes may clog and drip if not repaired correctly or in a timely matter, causing gradualy reduced efficiency. Regular maintenance will ensure heating and cooling systems are operating at peak efficiency.


Your modern vehicle is essentially a very large computer on wheels. New vehicles have more computers than ever before, with software, coding and microchips controlling virtually every function you have available at your fingertips, from how they shift, to how the climate control system works, the lights, signals, safety systems, and everything in between. To ensure your vehicles technical controls are firing on all cylinders, have your software updated to the newest possible version as often as you can.