Restore Peak Performance to Your GM Vehicle
Is your Cadillac, Silverado, or Corvette suffering from a persistent check engine light, erratic performance, or a frustrating no-start condition? The Engine Control Module (ECM) is the central computer of your vehicle, and when it fails, it can cause a cascade of confusing and costly problems. This isn’t just a part; it’s the solution to get your vehicle running reliably again. We offer a direct-fit replacement ECM, part number 12676230, that arrives at your door programmed specifically for your vehicle’s VIN with the latest official GM software updates.
Forget about expensive towing bills and high dealership programming fees. By providing your Vehicle Identification Number (VIN) at checkout, you receive a module that is ready for installation right out of the box. This process ensures that all factory parameters for your specific engine, transmission, and options are correctly loaded, restoring the precise performance and fuel efficiency you expect from your GM vehicle. This is the most efficient way to solve complex electronic issues and get back on the road with confidence.
From the Diagnostic Bay: The Ghost in the Machine
I once had a 2015 Sierra 1500 in the shop that was driving its owner crazy. It would randomly go into ‘Reduced Engine Power’ mode and flash a ‘Service StabiliTrak’ message, but with no consistent codes. The owner had already replaced the throttle body and accelerator pedal position sensor at another shop, with no success. After hooking up my scope and monitoring the CAN bus network data, I noticed intermittent communication dropouts from the ECM, especially under load. The ECM wasn’t throwing a hard P0601 (Internal Memory Checksum Error) code, but it was clearly failing internally, disrupting the entire vehicle network. We installed a VIN-programmed 2014-2016 ATS ECM (the same family of module) and the problems vanished instantly. It’s a classic case where the root cause is the computer itself, not the sensors it’s monitoring.
Is Your GM Vehicle Showing These Signs?
- ✔ Persistent Check Engine Light (CEL) that won’t clear.
- ✔ Vehicle will not start or is difficult to start.
- ✔ Poor fuel economy and engine performance.
- ✔ Engine stalling, sputtering, or misfiring.
- ✔ Transmission shifting issues or harsh shifts.
- ✔ Communication error codes, such as U0100 (Lost Communication with ECM/PCM).
- ✔ Internal module failure codes like P0601, P0606, or P062B.
- ✔ Failure to pass state emissions testing.
Your Straightforward Installation Guide
Installing your new ECM is a manageable job for a DIY enthusiast or a quick task for any professional mechanic. Always consult a service manual for your specific vehicle, but here is a general guide:
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the ECM: On most of these vehicles (like the Silverado/Sierra and ATS), the ECM is located in the engine compartment, often on the driver’s side fender or firewall. On the Corvette, it’s typically on the passenger side cowl area under the dash.
- Disconnect and Remove: Carefully unplug the electrical connectors. Most have a locking tab or lever that needs to be released. Once disconnected, unbolt the old ECM from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed ECM into place. Reconnect the electrical connectors, ensuring they click securely into position.
- Reconnect Power: Reattach the negative battery terminal and tighten it securely.
- Final Steps: In some cases, a security relearn procedure (often called a Passlock or Passkey relearn) may be required. This can typically be done without special tools and involves a sequence of key cycles. Your vehicle’s service manual will have the specific procedure if needed. Start the engine and verify that the check engine light is off and the vehicle runs smoothly.
Verified Vehicle Compatibility
This module is a direct replacement for part number 12676230 and other interchangeable numbers. Please verify your part number or contact us with your VIN to ensure compatibility. This part fits a wide range of GM vehicles, including:
CAMARO (2016)
CANYON (2015-2016)
COLORADO (2015-2016)
CORVETTE (2014-2016)
CTS (2014-2016)
ESCALADE / ESV (2015-2016)
SIERRA 1500 / DENALI 1500 (2014-2016)
SILVERADO 1500 PICKUP (2014-2016)
SUBURBAN 1500 (2015-2016)
TAHOE (2015-2016)
YUKON / XL 1500 (2015-2016)
XTS (2014-2016)
Note: Specific engine and option codes may apply. The provided fitment list is a guide. VIN programming ensures it is correct for YOUR vehicle.
Frequently Asked Questions
What exactly is VIN programming?
VIN programming is the process where we load your vehicle’s unique 17-digit Vehicle Identification Number into the ECM. This allows the module to be configured with the correct software and calibrations for your specific engine, transmission, and factory-installed options, ensuring it works seamlessly with your vehicle’s other systems.
Do I need to do anything after I install this ECM?
Because the module arrives pre-programmed, no further flashing is needed. However, some GM vehicles may require a simple security relearn procedure to sync the new ECM with the anti-theft system. This can usually be done in your driveway by cycling the ignition key and takes about 10-30 minutes.
How do I find my original part number?
The part number is printed on a sticker on the case of your current ECM. It will typically be a multi-digit number, like 12676230. Matching this number helps confirm compatibility, but our VIN programming is the most definitive way to guarantee a correct match.
Will this fix my check engine light?
If the check engine light is caused by a failing ECM (e.g., codes P0601, U0100), then yes, this part is the correct fix. However, it’s always best to have the codes professionally diagnosed to ensure the problem isn’t a faulty sensor or wiring issue.
Is this compatible with other part numbers?
Yes, this module is a compatible replacement for several part numbers, including 12692067, 12656993, 12662034, 12672537, 12673195, 12663391, 12672963, and 12669318. Our VIN programming ensures it functions correctly regardless of which of these part numbers was originally in your vehicle.