Restore Your Vehicle’s Core Performance and Reliability
Is your Chevrolet, Cadillac, or GMC acting up? Stalling, running rough, or refusing to start can be incredibly frustrating and often point directly to a failing Engine Control Module (ECM). As the ‘brain’ of your vehicle’s engine, a faulty ECM can cause a cascade of problems, from poor fuel economy to a no-start condition that leaves you stranded. This isn’t just an inconvenience; it’s a critical failure that needs a reliable solution. This listing is for a replacement ECM, part number 12676230, that arrives at your door fully programmed to your vehicle’s specific VIN. We handle the complex part so you can get back on the road with confidence.
A Technician’s Notebook
I remember a 2015 Silverado 1500 that came into the shop with a complaint that stumped two other mechanics. The truck would randomly lose power and stall, but only after it was fully warmed up, and it never stored a consistent trouble code. We checked fuel pressure, sensors, and wiring harnesses for hours. Finally, while monitoring live data, I saw the ECM’s internal processor voltage flicker just before a stall. It was a classic sign of internal heat-related failure. We swapped in a VIN-programmed module like this one, and the problem was solved instantly. These intermittent issues are often the hardest to diagnose and are a tell-tale sign of a failing 2016 Camaro Engine Control Module or its equivalent in other GM models.
Is Your Vehicle Showing These Symptoms?
A failing ECM can manifest in many ways. If you’re experiencing any of the following, it’s a strong indicator that your engine computer may need replacement:
- ✔ Check Engine Light is on with no clear cause
- ✔ Engine cranks but will not start
- ✔ Intermittent stalling or rough idling
- ✔ Noticeable decrease in fuel efficiency
- ✔ Poor engine performance or hesitation during acceleration
- ✔ Communication error codes, such as U0100 (Lost Communication with ECM/PCM)
- ✔ Internal module memory error codes like P0601, P0603, or P0606
- ✔ Transmission shifting problems or other modules acting erratically
A Straightforward Guide to Installation
Installing your new ECM is a manageable job for a DIY enthusiast or any professional mechanic. Our VIN programming service makes this process significantly easier, but following the correct steps is crucial for success.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait at least 15 minutes to allow all modules to power down completely.
- Locate the ECM: On most compatible vehicles like the Silverado, Sierra, or Tahoe, the ECM is located in the engine compartment, typically on the driver’s side. On vehicles like the Corvette, it may be under the cowl. Consult a vehicle-specific repair manual if you are unsure.
- Disconnect and Remove: Carefully unplug the wiring harness connectors. They have locking tabs that must be released. Once disconnected, unbolt the old module from its mounting bracket and remove it.
- Install the New Module: Mount the new ECM securely onto the bracket and reconnect the wiring harnesses. Ensure they click into place to establish a solid connection.
- Reconnect the Battery: Reattach the negative battery terminal and tighten it securely.
- Perform Security Relearn: Many GM vehicles require a security relearn procedure after ECM replacement. This can often be done without special tools by cycling the key. A common method is to turn the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’ for 10 seconds, and repeating this cycle three times. Your vehicle’s service manual will have the exact procedure.
Verified Vehicle Compatibility
This module, part number 12676230, is a direct replacement for several original part numbers and fits a wide range of GM vehicles. Please verify your vehicle and options from the list below. Providing your VIN at checkout is mandatory to ensure we send you a perfectly matched and programmed unit.
Fitment:
ATS (2014-2016) – 3.6L
CAMARO (2016) – 6.2L
CANYON (2015-2016) – 3.6L
COLORADO (2015-2016) – 3.6L
CORVETTE (2014-2016)
CTS (2014-2016) – 3.6L, 6.2L
ESCALADE / ESV (2015-2016)
SIERRA 1500 / DENALI (2014-2016)
SILVERADO 1500 (2014-2016)
SUBURBAN (2015-2016)
TAHOE (2015-2016)
YUKON / XL (2015-2016)
XTS (2014-2016) – 3.6L
Note: Some models require matching the ID number from your original module. Please check the list carefully.
Frequently Asked Questions
Frequently Asked Questions
Do I need to program this module?
No. We program the module to your vehicle’s VIN before shipping. It arrives ready for installation and the security relearn procedure, saving you a trip to the dealership and additional fees.
Where do I find my VIN?
Your 17-digit Vehicle Identification Number (VIN) can be found on your vehicle’s registration, insurance card, or on a plate on the driver’s side dashboard visible through the windshield.
Will this fix my specific problem?
This part resolves issues directly caused by a failing ECM. While symptoms like a check engine light or stalling are common indicators, it’s essential to have the vehicle properly diagnosed. This module will fix the problem if the original ECM is confirmed to be the faulty component.
What happens after I place my order?
After you purchase, you must provide us with your vehicle’s VIN. We will then program the module with the latest GM software specific to your vehicle and ship it out to you, typically within one business day.
Is this a difficult part to install?
For someone with basic mechanical skills, the installation is straightforward. It involves disconnecting the battery, unplugging connectors, and swapping the module. The most critical post-installation step is the security relearn procedure.