Quickly identify and fix engine issues with diagnostics & expert repair. Maximize the power and reliability of your diesel engine with expert care
Revive your diesel engine with precision rebuilds and seamless swaps. Ideal for worn or failing diesel engines.
Specialized DT12 transmission solutions trusted by Calgary’s trucking community. Precision handling for commercial and freight vehicles.
Ensure peak engine performance with premium diesel oil change solutions.. Fast, affordable, and tailored for diesel vehicles.
Certified CVI inspections to meet Alberta safety standards. Ensure your vehicle is compliant and road-ready.
Solve Diesel Particulate Filter problems with advanced diagnostics and cleaning. Improve performance and lower emissions.
Find and fix electrical faults fast. Expert diagnosis and repair of wiring, sensor, and ECU problems in diesel trucks.
Optimize your diesel engine and transmission with expert control module programming. Boost performance and reliability.
Trust your vehicle to our licensed and AMVIC-certified shop. Quality repairs with compliance and professionalism guaranteed..
At Diagnostic Diesel Specialist Inc. , Proudly serving Calgary as the go-to specialists for reliable diesel engine repair and maintenance. With years of hands-on experience, our certified team delivers professional, high-performance solutions for heavy-duty diesel trucks and commercial vehicles across Alberta.
From Comprehensive Vehicle Inspections (CVI) and premium oil changes to complete engine rebuilds , DT12 transmission service, and DPF troubleshooting, we cover every critical system with care and precision. We are an AMVIC-licensed shop , committed to safety, compliance, and transparent service
Our technicians also specialize in MCM, ACM, and TCM module programming, electrical diagnostics , and custom diesel performance tuning — making us your one-stop solution for diesel reliability. Whether you’re maintaining a fleet or servicing a single truck, diagnostic diesel specialist is here to keep you running strong.
We begin with a detailed inspection and advanced diagnostics to pinpoint exactly what's wrong with your diesel vehicle — no guesswork, just clarity.
Our certified technicians provide honest recommendations & perform repairs using high-quality parts to restore performance & safety.
Every repair is followed by a full system test. Your vehicle is returned in top shape — clean, compliant, and ready for the road.
Expert repair solutions for trucks and fleets that keep your business moving.
From diagnostics to delivery, we’re here to get you back on the road — fast, reliable, and stress-free
We specialize in heavy-duty diesel trucks, commercial fleets, and freight vehicles. Whether it’s a single truck or an entire fleet, we’ve got the expertise to handle it.
Yes, we are fully AMVIC-licensed, which means our services meet Alberta’s strict safety, compliance, and transparency standards.
Absolutely. Every repair starts with detailed diagnostics using advanced tools to pinpoint the issue — so you only pay for what’s truly needed.
We're based in Calgary but serve surrounding Alberta cities like Airdrie, Okotoks, Chestermere, and beyond.
The Detroit Diesel DD13 is built for demanding commercial applications
The DD13 engine, a reliable workhorse in medium- to heavy-duty Freightliner and Western Star trucks, is known for its performance
