A semi-truck travels along a highway with snow-capped mountains in the background.

Annual Safety for Trucks, Trailers & Commercial Vehicles

We insure your safety on road we do inspect all commercial vehicles and issue yellow strikers for annual safety.

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A semi-truck travels along a highway with snow-capped mountains in the background.

Full Fleet Services for Repairing & Annual Safeties

Comprehensive fleet repair and annual safety inspections to keep your vehicles road-ready and compliant.

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A semi-truck travels along a highway with snow-capped mountains in the background.

24/7 Emergency Roadside Assistance: On-Road, Scale & Yard

Full coverage of breakdown truck and trailer on road, on yard or on scale, just call: 416-877-9515.

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Welcome to Diesel Doctorz

With over two decades of industry experience, our team has the expertise to service all types of trucks efficiently.

Whether you are in Mississauga, Brampton, Oakville, or anywhere else in the Western GTA, you can count on us for reliable and high quality service wherever your truck needs us.

Call: 416-672-0823

Mobile Truck & Trailer Repair

Expert mobile truck and trailer repair with 20+ years’ experience servicing all makes and models.

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Annual Safety Inspection

Licensed, MTO-approved mobile safety inspections and yellow stickers for all commercial vehicles.

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24/7 Roadside Assistance

On-call mobile service for trucks, trailers, and buses. Fast roadside repair by licensed mechanics.

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Fleet Maintenance Services

Reliable scheduled maintenance for fleets of all sizes.

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Our Services

We provide fast, reliable repair and maintenance for all types of trucks, trailers, buses, and heavy-duty vehicles. From minor fixes to major breakdowns, our expert mobile team gets you back on the road quickly and safely.

Mobile Truck & Trailer Repair Service

24/7 mobile repair for all trucks and trailers, any issue, anywhere in the Greater Toronto Area.

Annual Safety for Commercial Vehicles

Ministry-approved inspections with yellow sticker certification for trucks, trailers, and commercial vehicles.

24/7 Roadside Assistance & On-scale Service

Round-the-clock roadside help for trucks, trailers, and buses—on road, at scale, or in the yard.

Lights & Light Wiring Repairing

On-site light installation, wiring repairs, and troubleshooting for trucks and trailers.

Truck & Trailer Breakdown Repair

Fast mobile breakdown repairs in Brampton, Mississauga, Oakville, Etobicoke, and nearby areas.

Radiator, Water Pump, Hose & Belt Service

Cooling system service including radiator, water pump, hose, and belt repair or replacement.

Hydraulic Services for Commercial Vehicles

Expert hydraulic system maintenance and repair for all heavy-duty trucks and equipment.

Mobile Tire Repair & Replacement

Emergency tire repairs and replacements for all commercial vehicles, done quickly on-site.

Brakes, Brake Chamber & Suspension Repairing

Complete air brake, suspension, and brake chamber repairs done on-site or roadside.

Mobile Tire Repair & Replacement

Emergency tire repairs and replacements for all commercial vehicles, done quickly on-site.

Tailgate, Tailgate Handle Repair & Replacement

Fast, reliable repairs and replacement for tailgates and handles on trailers and reefers.

Accidental Recovery & Towing Service for Trucks

24/7 accident recovery and towing for trucks, trailers, buses, and heavy vehicles across the GTA.

We Service All Makes & Models

Trusted Fleet Maintenance Since 2003

With over two decades of experience, we’ve been keeping commercial fleets running smoothly and safely. From routine servicing to full inspections, we know what it takes to keep your trucks on the road and your business moving.

Have any questions?

Call: 416-877-9515

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Need Emergency Roadside Assistance?

Call: 416-672-0823

Client Testimonials

Jason M.

Broke down on the 410 near Brampton late night, thought I was stuck for hours but they showed up quick. Fixed a busted air line on the spot. Life saver.

Raj S.

“Been using them for my small fleet’s maintenance for over a year now. Trucks stay in good shape, they know what they’re doing and always on time.”

Mike D.

“Had an issue on the scale, brake lights weren’t working and got pulled over. Called these guys, they came fast and sorted it out. Even did a quick check on a few other things.

Ahmed K.

“We needed safety stickers for 6 trailers, they came out to our yard and got it all done same day. Good services, straight shooters.”

Leo F.

“Turbo pipe blew on the 401, truck wouldn’t pull. Called them up and they got me back running in no time. Really solid crew.”

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