Maintenance & basic repairs
Everyday service and repairs to keep your truck ready for the next job.
- Oil, filter and fluid services
- Belts, hoses and coolant leaks
- Battery and starting-system repairs
- Preventive maintenance and inspections
MOBILE TRUCK & TRAILER REPAIR
Truck trouble?
Call the Doc.
From basic repairs and routine maintenance to advanced computer diagnostics, we work on the truck and trailer systems that keep your business moving.
Mobile service van · Available 24/7 in Brampton & the GTA.
ON-SITE SERVICEWe come to you.
TRUCK REPAIRTRAILER REPAIRADVANCED DIAGNOSTICSMOBILE SERVICE
WHAT WE DO
From basic repairs
to advanced diagnostics.
One call for everyday repairs, mechanical work and complex faults. We service trucks and trailers for owner-operators and fleets across Brampton and the GTA.
Call with your truck model, engine and repair needs. We will confirm the work, parts requirements and whether the repair can be completed at your location.
BEYOND THE FAULT CODE
Find the cause.
Plan the repair.
A warning light tells you where to start. We combine computer diagnostics with electrical and mechanical checks to investigate what is causing the fault. From a loose connection to a complex engine or aftertreatment issue, the aim is a clear diagnosis and a practical repair plan.
- Read the system: review fault codes, operating data and the conditions when the problem occurs.
- Test the cause: check components, circuits and mechanical operation as needed.
- Complete the repair: address the identified fault and check system operation after the work.
DIAGNOSTIC SUPPORT ACROSS MAJOR SYSTEMS
Cummins · Detroit · PACCAR · Volvo
Mack · Hino · Allison · Eaton
Call with your model and year to confirm service for your vehicle.
A CLOSER LOOK AT OUR WORK
Real trucks.
Hands-on repairs.
From engine components to transmission systems, take a look at these clips from our repair work. Tap any video to play.
Engine block
A close-up look at the cylinder block during engine work.
Valvetrain work
Working around the rocker arms and valve springs.
Transmission components
A look inside the transmission at the valve body and electrical connections.
MOBILE DIAGNOSTICS & REPAIR
Hands-on service
where your truck is.
Our mobile team combines practical mechanical repair with advanced diagnostic testing for heavy-duty trucks and trailers. Call or text to discuss the problem and your location.
Call for serviceVisual shown for illustration. Your actual service vehicle and repair work can be featured when you upload a photo.
MOBILE SERVICE THAT FITS YOUR WORK
At the yard.
At the job site.
When the truck stops.
Our Our mobile service brings truck and trailer repair to your location in Brampton and the Greater Toronto Area. We come to your yard, job site or suitable roadside location for diagnostics, repairs and maintenance.
Describe the problem before we attend so we can discuss the next step, access to your vehicle and whether the work can be carried out on site.
Owner-operators
Your truck is your livelihood. Call with the symptoms, warning lights and any recent repairs so we can understand what has changed.
Fleets & dispatchers
Share the unit number, driver's contact details and truck location. For multiple vehicles or planned maintenance, call to discuss the work and scheduling.
Roadside enquiries
Tell us your exact location and whether the vehicle is in a safe place to access. We will confirm service availability and discuss the expected arrival time.
HOW IT WORKS
Start with a call.
Give us the details.
A few details up front help us prepare for your truck and the problem you're facing.
- 01
Tell us where you are
Call or text 647-914-2644 with your location, truck make, model, year and engine type if known.
- 02
Show us the symptoms
Describe what happens and when it started. Photos of warning lights, fault codes or the affected part can help.
- 03
Confirm the visit
Discuss availability, access to the truck and pricing before arranging service. Repair options depend on the fault and parts required.
TRUCKS, ENGINES & DRIVELINES
Tell us what
you're driving.
Diagnostic and repair enquiries for heavy-duty trucks from Freightliner, Western Star, Peterbilt, Kenworth, Volvo, Mack, International and Hino.
We also support enquiries for Cummins, Detroit, PACCAR, Volvo and Mack engines, plus Allison and Eaton transmission systems.
Coverage varies by vehicle, system and repair. Call with your model and year to confirm the service you need. Brand names identify the vehicles and systems discussed; Diesel Doc Truck Fix is an independent service business.
BEFORE YOU CALL
A few useful answers.
Do you handle basic repairs as well as advanced diagnostics?
Yes. Our work ranges from oil and filter services, hoses, lights, air leaks and general repairs to engine work, transmission troubleshooting, electrical testing and advanced computer diagnostics. Call with your truck details and the work you need.
Are you available at night and on weekends?
Yes. We operate 24 hours a day, seven days a week. Call to confirm availability and arrival time for your location.
Do I need to bring my truck to a shop?
We provide mobile service in Brampton and the GTA. Many diagnostic and repair jobs can be assessed on site. Call to discuss your issue and whether the location is suitable for the work.
What should I send when asking for service?
Send your location, truck make, model, year, engine type if known and a description of the problem. Include fault-code photos and let us know whether the engine starts, the truck moves and any recent work has been completed.
Can you help with a check-engine light or derate?
We offer engine and aftertreatment diagnostics, including power-loss, DPF and DEF concerns. A fault code is a starting point; further checks help determine the cause and the repair needed.
Do you repair trailers as well?
Yes. Contact us about trailer lights, wiring, air leaks, brake and suspension concerns. Describe the issue so we can confirm the work and any parts requirements.
How much will the repair cost?
Pricing depends on your location, the diagnostic work, labour and parts needed. Call or text with the details to discuss pricing before arranging service.
BRAMPTON & THE GREATER TORONTO AREA
Your truck.
Your location.
Our next call.
Mobile truck and trailer service
Open 24 hours, every day.
Send your location, truck make and model, and a short description of the problem. Call to confirm arrival time and service availability.