Diesel Engine Repair
Overhauls, rebuilds, turbos, cooling, fuel systems and performance diagnostics for heavy-duty diesel engines.
Dorval, Québec · Heavy-Duty Specialists
We keep your
trucks & trailers
on the road.
A.S Garage is a full-service general truck repair shop in Dorval. From diesel engine work to brakes, welding and roadworthy inspections — we get you back rolling, fast.
- 15+Years experience
- 7-DayAvailability
- FleetAccounts welcome
15Years in business
9000Repairs completed
120Fleet clients served
60Min. avg. diagnosis
ASE-mindedCertified workmanship
// About the shop
Straight talk, honest repairs, trucks that stay fixed.
A.S Garage has served owner-operators, small fleets and logistics companies across the Greater Montreal area from our shop at 1655 Boul Hymus, Dorval. We work on tractors, trailers, straight trucks and everything in between — diesel and beyond.
Downtime costs you money, so we diagnose fast, quote clearly, and only do the work you approve. No surprises, no upsells — just heavy-duty repairs done right the first time.
- Licensed, experienced diesel technicians
- Transparent quotes before any work begins
- OEM & quality aftermarket parts
- Fleet maintenance programs available
// Our services
Full-service truck & trailer repair
One shop for the whole rig. Whatever's keeping your truck parked, we have the tools, diagnostics and hands to fix it.
Brakes & Air Systems
Air brake service, drums, rotors, S-cams, slack adjusters and full air-line leak diagnosis to keep you stopping safe.
Trailer Repair
Suspension, landing gear, kingpins, doors, flooring, reefer units, lights and structural welding for all trailer types.
Welding & Fabrication
Frame straightening, cross-member repair, custom brackets and heavy structural welding — MIG, TIG and stick.
Electrical & Lighting
Batteries, alternators, starters, wiring harnesses, ABS faults, sensors and full lighting compliance repairs.
Tires & Alignment
Mounting, balancing, rotation, road-force alignment and 24/7 flat repairs for tractors and trailers.
Hydraulics
Cylinders, pumps, hoses, PTOs, dump and lift systems — diagnosed, resealed and rebuilt for reliable power.
Safety Inspections
Pre-trip, preventive maintenance and roadworthy-style inspections to keep your rig legal and out of the yard.
Mobile & Roadside
Broken down on the highway? Our mobile service comes to you for jump-starts, tires, air lines and quick fixes.
// Why A.S Garage
Built to get you back on the road faster
Every hour a truck sits is money lost. We're structured around speed, honesty and repairs that last.
Fast turnaround
Priority diagnostics and stocked common parts mean less waiting, more driving.
Honest quotes
You approve the work and the price before we lift a wrench. No hidden fees.
Experienced techs
Seasoned diesel mechanics who know tractors and trailers inside and out.
Flexible hours
Early starts and Saturday service so your rig is ready when you roll out.
// Fleet & commercial
Managing a fleet? Let's keep them all rolling.
Custom preventive-maintenance schedules, priority booking and consolidated invoicing for logistics companies, delivery fleets and owner-operator groups across Greater Montreal.
// How it works
Four steps to a fixed truck
A simple, transparent process from the first call to driving away.
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01
Call or message
Tell us the truck, the trailer and the symptom by phone or WhatsApp. We book you in fast.
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02
Diagnose
We inspect and run diagnostics to find the real problem — not just the symptom.
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03
Approve the quote
You get a clear, itemized quote. Nothing happens until you say go.
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04
Repair & roll out
Quality parts, tested work, and your rig back on the road where it belongs.
// In the shop
Work from the bay
A look at the heavy-duty jobs that roll through A.S Garage every week.
// What drivers say
Trusted by owner-operators & fleets
★★★★★"Blew an air line on the 40 and A.S Garage had me sorted the same afternoon. Fair price, no runaround."
★★★★★"We run twelve trailers through here for PM. Honest quotes and they actually stick to the schedule. Rare."
★★★★★"Diagnosed an engine fault three other shops missed. These guys actually know diesel."
// Where to find us
Serving Dorval & Greater Montreal
Conveniently located near Trudeau airport and the major highways, A.S Garage is easy to reach for trucks coming off the 20, 40 and 520.
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Phone263-866-6010
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HoursMon–Fri 7am–7pm · Sat 8am–4pm
// Questions
Frequently asked
Do you work on both trucks and trailers?+
Yes. A.S Garage handles the complete rig — tractors, straight trucks and every trailer type, including suspension, brakes, welding and reefer support.
Can you come to me if I break down?+
We offer mobile and roadside assistance for common issues like tires, air lines and jump-starts. Call 263-866-6010 and we'll dispatch or talk you through it.
Do I get a quote before the work starts?+
Always. We diagnose, then send you a clear itemized quote. No work happens until you approve it.
Do you handle fleet maintenance contracts?+
Absolutely. We build custom preventive-maintenance schedules with priority booking and consolidated invoicing. Ask us about fleet accounts.
What areas do you serve?+
Dorval and the Greater Montreal area, including Lachine, Pointe-Claire, Vaudreuil and the West Island, right off the 20, 40 and 520.
What are your hours?+
Monday to Friday 7am–7pm and Saturday 8am–4pm. For emergencies outside those hours, call and we'll do our best to help.
// Get in touch
Request a repair or a quote
Fill in the details below and hit send — it opens straight in WhatsApp so we can reply fast. Prefer to talk? Just call.