Your Duramax is Down, and So is Your Workflow.
A dead or malfunctioning Duramax isn’t just an inconvenience—it’s a roadblock that stops your work, halts your haul, and costs you money. If your 2014-2015 Silverado, Sierra, or Express/Savana van is suffering from frustrating no-start conditions, erratic engine behavior, poor performance, or a persistent check engine light, you’ve found the definitive solution. This Engine Control Module (ECM) is the brain of your 6.6L powerhouse, and we deliver it programmed and ready to get your truck back to work.
Common Failure Symptoms & Your Direct Solution
When the factory ECM fails, it can trigger a cascade of confusing issues. A proper diagnosis is key, but often the root cause points back to this central component. Symptoms often include:
- Complete no-start or crank-no-start condition
- Intermittent stalling or engine shutdown while driving
- Drastic loss of engine power and poor fuel economy
- Communication error messages on the dash
- Diagnostic Trouble Codes (DTCs) like P0606 (ECM Processor Fault) or U0100 (Lost Communication With ECM)
This Programmed 2014-2015 Duramax ECM is the direct answer to these problems. It restores the critical command and control functions, ensuring your engine operates exactly as GM engineers intended.
Features That Get You Back on the Road
- ✔ VIN-Specific Programming: We flash the module with your truck’s exact VIN and the latest GM-approved software before it ships, ensuring perfect compatibility and performance right out of the box.
- ✔ Restored Engine Performance: Eliminate issues like rough idling, poor fuel economy, and hesitation by restoring precise fuel injection and timing control for your 6.6L engine.
- ✔ Simplified Installation: By arriving pre-programmed, this module significantly reduces vehicle downtime and the complexity of the repair. Just install it and perform the required security relearn.
- ✔ Direct Fit Guarantee: Engineered as a direct replacement for OEM part numbers 12658036 and 12667377, guaranteeing a perfect fit in your 2014-2015 GM truck or van.
- ✔ Reliable & Inspected: Each module is meticulously inspected to ensure it resolves common failure points, providing a dependable and long-lasting fix for your workhorse.
- ✔ Peace of Mind Coverage: This unit is backed by our one-year replacement warranty.
From the Technician’s Bench: A common mistake we see is installing a used, un-programmed ECM from a salvage yard. This almost never works. The modern Duramax platform relies on a complex network where modules must communicate using the vehicle’s unique VIN. Our process of programming this Programmed 2014-2015 Duramax ECM with the latest GM software *before* it ships is the key to a successful repair. Remember, after installation, performing the security relearn is a non-negotiable final step. It authenticates the new ECM to the truck’s anti-theft system, allowing the engine to start and run as it should.
Frequently Asked Questions
What information do you need from me?
After you complete your purchase, we will require your vehicle’s 17-digit Vehicle Identification Number (VIN). This is essential for us to load the correct, vehicle-specific software onto your new ECM.
Is this module difficult to install?
The physical installation is straightforward for anyone with moderate mechanical skill. The critical part of the process is the post-installation electronic ‘security relearn’ or ‘theft deterrent relearn’. This procedure requires a compatible high-end scan tool or access to GM’s TIS2Web service and must be performed for the vehicle to start.
What is a ‘security relearn’?
It’s a required electronic procedure that syncs the new ECM with your vehicle’s existing anti-theft and ignition systems. Without this step, the vehicle’s security system will prevent the engine from starting. This is a standard security measure on all modern GM vehicles.
Will this fix my check engine light?
If your check engine light and performance issues are caused by a faulty ECM (indicated by codes like P0606), this part is the correct solution. However, we always recommend having a qualified technician perform a full vehicle diagnosis to confirm the ECM is the point of failure before ordering.
Do I need to send my old computer back?
No. This is an outright purchase, and there is no core charge or need to return your old, failed module. This helps get your truck repaired faster without waiting for return shipping.