Get Your Workhorse Back on the Job, Fast.
Is your 2013-2014 Silverado, Sierra, Express, or Savana van with the 6.6L Duramax engine suddenly dead in the water? A faulty Engine Control Module (ECM) is one of the most common and frustrating causes of no-start conditions, erratic performance, and persistent check engine lights. When your livelihood depends on your truck, downtime isn’t an option. This is the direct, reliable solution to get you back to work. This genuine GM 12654088 ECM is professionally programmed to your vehicle’s specific VIN, ensuring it’s ready for installation and relearn procedures right out of the box.
Common Symptoms & Your Solution
A failing ECM can manifest in various ways, often mimicking other sensor or component failures. If you’re experiencing any of the following, a faulty module is a likely culprit:
- Complete no-start or crank-no-start condition.
- Intermittent stalling or engine shutdown while driving.
- Loss of communication with diagnostic scan tools.
- Multiple communication-related trouble codes (U-codes) stored.
- Erratic transmission shifting or communication errors with the TCM.
- Check engine light with codes related to internal processor failure.
Replacing the module with a generic, unprogrammed unit from a parts store or salvage yard won’t solve the problem. Our service bridges that gap by delivering a properly flashed 12654088 ECM that matches your truck’s factory calibrations, saving you a trip to the dealership and minimizing your vehicle’s downtime.
Features & Benefits
- ✔ VIN-Specific Programming: We flash the module with the latest GM software updates using your vehicle’s VIN. This ensures compatibility with your truck’s specific options and systems.
- ✔ Direct Fit Solution: This used, genuine GM part is a direct replacement for service numbers 12654088 and 12653319, guaranteeing a perfect fit and connection.
- ✔ Cost-Effective Repair: Avoid the high costs of a new module and dealership programming fees. This is a practical solution for a working truck.
- ✔ Restore Peak Performance: A correctly functioning ECM is critical for engine power, fuel efficiency, and emissions control in your Duramax diesel.
- ✔ This unit is backed by our one-year replacement warranty.
An Expert’s Take on Duramax Electronics
“As a technician who’s spent years under the hoods of these HD trucks, I can tell you the ECM is the brain of the entire operation. It’s not just about fuel and spark anymore. On a 6.6L Duramax, the ECM manages everything from complex emissions systems like the DPF to injector balance rates and communication with the transmission controller. When it fails, the whole system grinds to a halt. Using a pre-programmed 12654088 ECM that’s flashed to the VIN is the only professional way, outside of the dealer, to ensure all those systems handshake correctly after installation. It’s the difference between a quick repair and a week-long diagnostic nightmare.”
Frequently Asked Questions
What information do you need from me?
After you complete your purchase, you must provide us with your vehicle’s 17-digit VIN (Vehicle Identification Number). We cannot program and ship the module without it.
Will my truck start immediately after installation?
In most cases, no. Because this is a security-related component, a Vehicle Theft Deterrent (VTD) relearn procedure must be performed after installation. This requires a professional scan tool or access to the GM TIS2WEB system. This is a standard procedure for this type of repair.
Are other relearn procedures required?
Possibly. Depending on your vehicle’s specific condition and codes, additional procedures like a crankshaft position variation relearn or injector flow rate programming may be necessary. These are the responsibility of the installer and are critical for optimal engine performance.
Is this a new part?
No, this is a high-quality, used ECM that has been sourced from a salvaged vehicle and thoroughly inspected. It is then programmed to function as a direct replacement for your failed unit.
How do I confirm this fits my vehicle?
This ECM fits 2013-2014 GM trucks and vans with the 6.6L Duramax engine, specifically for service numbers 12654088 and 12653319. Please check the part number on your original module to ensure an exact match.