Heavy-Duty Truck Repair: Frequently Asked Questions

The questions we hear most often at our Saint-Laurent shop. Can't find your answer? Give us a call.

Which truck makes do you repair?

We repair the major North American makes: Volvo, Freightliner, International, Kenworth, Peterbilt, Mack and Western Star, along with their Cummins, Detroit Diesel, Volvo, Mack and PACCAR engines.

See the makes we repair

Are you a good alternative to the dealership?

Yes. We handle electronic diagnostics, heavy mechanical work and preventive maintenance on every make, with competitive rates and one point of contact for your whole fleet.

What's the difference between PM-A and PM-B?

PM-A is a preventive inspection of the main components. PM-B includes everything in PM-A, plus an engine oil and filter change and full chassis lubrication.

Schedule PM service

What is PEP?

Quebec's Preventive Maintenance Program (PEP) lets you have your heavy vehicles inspected at regular intervals. We schedule the inspections and follow up on repairs for you.

PEP preventive maintenance

Can you handle my truck's SAAQ inspection?

Yes, from start to finish: we pick up your truck on Montreal Island, coordinate the inspection, repairs and re-check when needed, with an estimate in under 36 hours. CM Montréal is not an SAAQ-authorized agent.

Request a SAAQ inspection

My truck is in derate. What should I do?

Derate is often tied to the aftertreatment system (DPF, SCR, DEF) or a sensor. Electronic diagnostics read the codes and find the real cause before any parts are replaced.

DPF, SCR and DEF repair

Why does my DPF keep clogging?

Lots of idling, short trips, or an injection or sensor problem can prevent regens. We find the cause before cleaning or replacing the filter.

Do you offer fleet maintenance?

Yes. We repair and maintain complete fleets, with scheduled service to reduce downtime.

Fleet maintenance

Where are you located and what are your hours?

540 Montée de Liesse, Saint-Laurent, QC H4T 1N8. Open Monday to Thursday 6:00 a.m. to 9:30 p.m. and Friday 6:00 a.m. to 8:00 p.m.