A Duramax that struggles to start or loses power with a trailer behind it needs attention. At SuperTech Diesel Repair in Nanaimo, our diesel team helps Chevrolet and GMC owners get to the bottom of those problems.
We maintain and repair Duramax-powered Silverado HD and Sierra HD trucks, including fuel-system, turbocharger, cooling and emissions repairs.
Tell us what has changed. Does it happen on a cold morning, under load or after the engine warms up? Those details help us track down the fault.
Duramax trucks and engines we service
We work on Chevrolet Silverado 2500HD and 3500HD trucks and GMC Sierra 2500HD and 3500HD trucks, including these 6.6L Duramax engine generations:
- LB7
- LLY
- LBZ
- LMM
- LML
- L5P
Fuel and emissions equipment varies between generations. Have your truck’s year, model and VIN handy when you book, and let us know about any modifications or recent repairs.
Other Duramax applications
We also service 3.0L Duramax-powered Chevrolet Silverado 1500 and GMC Sierra 1500 trucks, and 2.8L Duramax-powered Chevrolet Colorado and GMC Canyon trucks. Contact us with your VIN and the work you need so we can confirm coverage for your vehicle.
When to book a Duramax diagnostic appointment
Book an appointment if you’ve noticed:
- A check engine light, reduced-power message or emissions warning
- Long cranking, hard starting, stalling or a no-start condition
- Rough idle, unusual engine noise or persistent exhaust smoke
- Poor acceleration or a loss of power when towing
- Coolant loss, overheating or visible fluid leaks
- DEF warnings or repeated regeneration concerns
Follow any stop-engine warning. If your truck overheats, stop safely and arrange assistance. Call us if you are unsure whether to drive it in or arrange a tow.
