Restore Peak Performance to Your GM Vehicle
As a technician with over two decades of experience under the hood, I’ve seen firsthand the frustration a failing Engine Control Module (ECM) can cause. One minute your Camaro or Silverado is running perfectly, and the next you’re dealing with a no-start condition, erratic idling, or a persistent Check Engine Light that leaves you stranded. The ECM is the brain of your engine, and when it fails, it can bring your entire vehicle to a halt. This isn’t just an inconvenience; it’s a complex problem that needs a reliable solution.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take a genuine GM Engine Control Module and flash it with the very latest, most stable software from General Motors, specifically matched to your vehicle using your VIN. This critical step, which we handle before shipping, means you can bypass the expensive trip to the dealership for programming. You get a module that’s ready to restore your vehicle’s original performance, fuel efficiency, and reliability right out of the box. For the professional mechanic, this saves valuable bay time. For the DIYer, it makes a complex job manageable.
Case Study: The Intermittent No-Start
I remember a 2015 Sierra 1500 that came into my shop with a maddeningly intermittent no-start condition. The owner had replaced the battery, starter, and even the fuel pump, but the truck would still randomly refuse to crank. There were no consistent trouble codes, just a few sporadic U-series communication faults. After hours of tracing wires, we tested the ECM. On the bench, it tested fine, but by monitoring data streams during a failure, we saw the processor voltage drop internally. A replacement ECM, programmed to the VIN, solved the problem instantly. It’s a classic example of how internal ECM failure can mimic other issues, making a quality, pre-programmed module the only true fix.
Is Your GM Vehicle Showing These Symptoms?
A faulty ECM can manifest in numerous ways. If you’re experiencing any of the following, a failing engine computer could be the culprit. I’ve seen these issues on hundreds of GM trucks and cars in my career.
- ✔ Engine stalling or misfiring for no apparent reason
- ✔ Complete no-start or difficult starting condition
- ✔ Check Engine Light is on with codes like P0601 (Internal Control Module Memory Check Sum Error), P0606 (ECM/PCM Processor Fault), or other processor-related faults
- ✔ Loss of communication with the module (U-codes)
- ✔ Poor or erratic automatic transmission shifting
- ✔ A noticeable drop in fuel economy
- ✔ Performance issues like hesitation or lack of power
A Straightforward Guide to Installation
With the programming already handled, the physical swap is very direct. While specific locations vary by model, the general process is the same. Always consult a service manual for your specific vehicle’s procedures and torque specs.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent accidental reconnection.
- Locate the ECM: On most GM trucks and SUVs, it’s in the engine compartment (often on the driver’s side). On cars like the Corvette or ATS, it may be under the cowl or in the passenger compartment.
- Disconnect Connectors: Carefully release the locking tabs on the electrical harness connectors and pull them straight out from the module. Never force them. Inspect connectors for any corrosion or damage.
- Remove the Old Module: Unbolt the mounting hardware holding the old ECM in place and remove it from the vehicle.
- Install the New Module: Mount your new, pre-programmed ECM and secure it with the original hardware.
- Reconnect Everything: Plug the electrical connectors firmly back into the new module until they click into place. Reconnect the negative battery terminal.
- Final Steps: Depending on your vehicle, a security relearn or throttle relearn procedure may be required. This can often be done without special tools and instructions are widely available online. Start the vehicle and check for proper operation.
Verified Vehicle Compatibility
This Engine Control Module is a direct-fit replacement for a wide range of GM vehicles. Please verify your model and options below. This part is compatible with service numbers: 12692067, 12676230, 12656993, 12662034, 12672537, 12673195, 12663391, 12672963, and 12669318.
- ATS (2014-2016)
- 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)
- XTS (2014-2016)
- YUKON / YUKON XL 1500 (2015-2016)
Frequently Asked Questions
Do I need to get this programmed by a dealer?
No. We handle all the programming for you before we ship the part. Simply provide your vehicle’s VIN during checkout, and it will arrive ready to install with the latest GM software for your specific vehicle.
What is a VIN and where do I find it?
The VIN (Vehicle Identification Number) is a unique 17-digit code for your vehicle. You can find it on your vehicle’s registration, insurance card, or on a small plate on the driver’s side of the dashboard, visible through the windshield.
My original part number isn’t 12656993, but it’s on the compatible list. Will this work?
Yes. Manufacturers often supersede part numbers. As long as your original part number is in the compatibility list provided in our description, this module is the correct, updated replacement for your vehicle.
Is any other setup required after installation?
In many cases, it’s a simple plug-and-play installation. However, some GM vehicles may require a security relearn procedure (also known as a CASE relearn or anti-theft relearn) to sync the new ECM with your keys. This procedure can typically be done without special tools and instructions are readily available online for your specific model.
How do I know my ECM is actually the problem?
The best way to be certain is with a proper diagnosis from a qualified mechanic. However, symptoms like a no-start condition, random stalling, and specific diagnostic trouble codes like P0601 or P0606 are strong indicators of a failed Engine Control Module.