Restore Peak Performance to Your C7 Corvette
As a technician with over two decades of experience under the hood, I know the frustration that comes with a failing Engine Control Module (ECM), especially in a high-performance vehicle like a 2014-2016 Corvette. The ECM is the brain of your engine, managing everything from fuel injection and ignition timing to emissions and transmission shifting. When it starts to fail, you’ll notice. Your Corvette might experience sudden stalling, a frustrating no-start condition, a persistent Check Engine Light, or a noticeable drop in power and fuel efficiency. These aren’t just annoyances; they’re signs that your car’s central command center is compromised.
This isn’t a part you can afford to ignore. A faulty ECM can lead to cascading problems, potentially damaging other expensive components. We offer a reliable and straightforward solution: a genuine GM Engine Control Module, part number 12663391, delivered to your door fully programmed with the latest GM software updates specific to your vehicle’s VIN. This eliminates the need for expensive dealership visits for programming. Simply provide your VIN at checkout, and we handle the rest, ensuring a seamless replacement process.
Case Study: A Tricky Diagnosis
I once had a 2015 Corvette in the bay with an intermittent no-start and random stalling that had stumped two other shops. All the usual suspects—fuel pump, crank sensor, battery—checked out fine. There were no consistent trouble codes, just a few random communication errors (U-codes) that would appear and disappear. After hours of tracing wires and checking grounds, I focused on the ECM. On a hunch, I monitored the 5-volt reference signal from the module during a test drive. Sure enough, I saw it drop out for a split second right before the engine would stumble. The internal processor was failing under thermal load. Replacing the ECM with a properly programmed unit like this one solved the problem completely. It’s a classic example of how a faulty 2014-2016 Corvette ECM can mimic other failures.
Is Your Corvette Showing These Symptoms?
- âś” Check Engine Light is on with codes like P0601, P0606, or other communication (U-series) codes.
- âś” The engine cranks but refuses to start.
- âś” Intermittent stalling, especially after the engine has warmed up.
- âś” Noticeable decrease in engine power and acceleration.
- âś” Poor or erratic automatic transmission shifting.
- âś” Reduced fuel economy for no apparent reason.
- âś” Communication issues with diagnostic scan tools.
A Straightforward Guide to Installation
For the confident DIYer or professional mechanic, replacing the 2014-2016 Corvette ECM is a manageable job. The module is located on the passenger side, under the cowl panel near the firewall.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electrical work.
- Access the Module: Locate and remove the passenger-side cowl panel to gain access to the ECM. It’s typically mounted to a bracket in that area.
- Disconnect Connectors: Carefully release the locking tabs on the electrical connectors and unplug them from the old module. Do not force them; they are designed to be removed with gentle pressure on the release mechanism.
- Remove the Old ECM: Unbolt the module from its mounting bracket and remove it from the vehicle.
- Install the New ECM: Mount your new, pre-programmed ECM onto the bracket and securely fasten the bolts.
- Reconnect Everything: Plug the electrical connectors firmly into the new module until they click into place. Reconnect the negative battery terminal.
- Perform Security Relearn: After installation, a security relearn procedure (often called a Pass-Key or anti-theft relearn) is required. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’, and repeating this cycle three times. Consult your service manual for the exact procedure for your model year.
Verified Vehicle Compatibility
This module is a direct replacement for multiple GM vehicles and part numbers. We program it specifically for your vehicle using your VIN. It is compatible with part numbers 12692067, 12676230, 12656993, 12662034, 12672537, 12673195, 12663391, 12672963, and 12669318. It fits the following models:
- ATS: 2014-2016
- CAMARO: 2016 (6.2L)
- CANYON: 2015-2016 (3.6L)
- COLORADO: 2015-2016 (3.6L)
- 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
- XTS: 2014-2016 (3.6L)
- YUKON / YUKON XL 1500: 2015-2016
This pre-programmed 2014-2016 Corvette ECM is your solution for getting your vehicle’s performance and reliability back to factory standards without the dealership hassle.
Frequently Asked Questions
What do you mean by ‘programmed to my VIN’?
When you provide your Vehicle Identification Number (VIN), we use official GM software to load the exact calibration file for your car’s specific engine, transmission, and options. This ensures the module works perfectly right out of the box, just like a new part from the dealer.
Is any additional programming required after installation?
Our programming covers the engine and transmission software. However, you will need to perform a security/anti-theft relearn procedure after installation. This is a simple process you can do yourself in about 30 minutes with just your car key and does not require a special scan tool.
Is this a brand new part?
This is a high-quality, tested OEM part that has been professionally programmed with the latest software from GM. It is guaranteed to restore your vehicle’s functionality to factory specifications.
Do I need to send my old ECM back?
No core charge or return is required for this part. You can keep or dispose of your old module as you see fit.
Will this fix my Check Engine Light?
If the Check Engine Light is caused by an internal failure of the ECM (common codes P0601-P0606), then yes, this part will resolve the issue. It’s always best to have a proper diagnosis to confirm the ECM is the root cause before ordering.