Great Canadian Diesel LTD.

Great Canadian Diesel LTD. Custom tuning & hardware for your Duramax, Cummins, Powerstroke & heavy equipment.

04/24/2026

CP4 failure can take out your entire fuel system… and cost you $10K+ real quick.

But most of the time? It’s preventable.

If you want a shot at 1,000,000 kms out of your CP4, it comes down to doing a few things right:

• Run quality fuel ⛽️
• Use a good diesel additive🔥
• Stay on top of maintenance🛠️

BONUS ‼️ Install a FASS Fuel system. This increases the Net Positive Suction Head to the HPFP and feeds the CP4 with clean, deaerated fuel.

Take care of your truck, and it’ll take care of you.

Depending on the platform you’re tuning you can expect peak performance gains up to +210HP / +500LB-FT. Better drivabili...
03/30/2026

Depending on the platform you’re tuning you can expect peak performance gains up to +210HP / +500LB-FT. Better drivability & AFR control better than stock resulting in cooler EGT’s 🔥

03/23/2026

The L5P platform is seriously impressive! This Great Canadian Diesel owned OBS L5P is proof! Clean power. Controlled EGT’s. Perfect TCM strategy.

Customer support. Quality tuning & parts. Reliability. That’s the standard. If you’re serious about your truck, you know where to go🔥

02/26/2026

Here’s a quick demo showing how SOTF works on your Duramax L5P.

Included are Dragy 1/4-mile and 80–150 km/h times to clearly show the differences between tunes.
Pay close attention to the EGTs during the Tune 1 pull ❄️

SOTF Tune Levels:
0️⃣ Optimized Stock
1️⃣ Heavy Tow
2️⃣ Light Tow
3️⃣ Street Economy
4️⃣ Race with torque limiting
5️⃣ Race w/o Torque limiting

Call or DM us when you’re ready 🔥💯

12/13/2025

Cold weather is brutal on factory emissions systems. Constant regens, clogged DPFs, frozen DEF lines and poor fuel mileage. It’s no surprise trucks struggle this time of year. A tune pack from Great Canadian Diesel will mitigate this! Give us a shout 7808040542

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Leduc, AB

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