Restore Peak Performance and Reliability to Your GM Vehicle
Is your 2015-2016 GMC Yukon or other compatible GM vehicle suffering from frustrating issues like a persistent check engine light, erratic idling, stalling, or a no-start condition? These are classic signs of a failing Engine Control Module (ECM). As the central computer of your vehicle, a faulty ECM can disrupt everything from fuel delivery and ignition timing to transmission shifting, making your vehicle unreliable and unsafe. Don’t let a bad module keep you off the road. This replacement ECM is your direct, hassle-free solution to restore your vehicle’s factory operation.
We take the guesswork and high costs out of the repair process. Unlike a generic module from a parts store or a salvage yard, this unit is professionally programmed specifically for your vehicle using your VIN. We install the latest GM-certified software updates, ensuring seamless communication with all other onboard systems. This means no expensive trips to the dealership for programming—it arrives at your door ready for installation. This is the smart, efficient way to fix it right the first time.
Case Study: The Ghost in the Machine
“A 2015 Yukon was brought into my bay with an intermittent no-start condition that had two other shops stumped. They had replaced the battery and even the fuel pump, but the problem persisted. The owner was frustrated and out of pocket. When I connected my scan tool, I found a U0100 ‘Lost Communication with ECM’ code that only appeared sporadically. Instead of throwing more parts at it, I inspected the ECM connectors and wiring—all good. Experience told me the ECM’s internal processor was failing under certain temperature conditions. We installed one of our VIN-programmed modules, and the problem was solved instantly. It’s a reminder that the ECM is the brain, and when it fails, it can create symptoms that mimic many other issues.”
Common Signs of a Failing ECM
- ✔ Engine stalling or misfiring for no apparent reason
- ✔ Vehicle refuses to start, but the battery and starter are good
- ✔ Persistent Check Engine Light (CEL) on the dashboard
- ✔ Diagnostic trouble codes (DTCs) related to internal module failure (e.g., P0601, P0606) or communication errors (U0100)
- ✔ Noticeable decrease in fuel economy
- ✔ Poor or erratic automatic transmission shifting
- ✔ Failure to pass an emissions inspection
Your Straightforward Installation Guide
- ✔ 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 compatible trucks and SUVs like the Yukon, Sierra, and Silverado, the ECM is located in the front of the engine compartment on the driver’s side, near the air filter housing.
- ✔ Disconnect Connectors: Carefully release the locking tabs on the electrical connectors and pull them straight out from the module. Never force them. Inspect the connectors for any corrosion or damage.
- ✔ Remove the Old Module: Unbolt the old ECM from its mounting bracket. Keep the hardware as you will reuse it.
- ✔ Install the New Module: Mount your new, pre-programmed ECM onto the bracket and secure it with the original bolts.
- ✔ Reconnect Everything: Firmly plug the electrical connectors back into the new ECM until they click into place. Reconnect the negative battery terminal.
- ✔ Final Steps: Your vehicle may require a security relearn procedure, which typically involves turning the key to the ‘ON’ position for 10-15 minutes. Consult your owner’s manual for specific instructions. Start the engine and verify the check engine light is off.
Verified Vehicle Compatibility
This module is a direct-fit replacement for a wide range of General Motors vehicles. It is crucial to match your part number or confirm your vehicle is on this list. This ECM, part number 12662034, is interchangeable with part numbers: 12692067, 12676230, 12656993, 12672537, 12673195, 12663391, 12672963, and 12669318.
Fitment includes, but is not limited to:
- GMC Yukon / Yukon XL (2015-2016)
- GMC Sierra 1500 / Sierra Denali 1500 (2014-2016)
- GMC Canyon (2015-2016)
- Chevrolet Silverado 1500 (2014-2016)
- Chevrolet Suburban / Tahoe (2015-2016)
- Chevrolet Colorado (2015-2016)
- Chevrolet Corvette (2014-2016)
- Chevrolet Camaro (2016)
- Cadillac Escalade / Escalade ESV (2015-2016)
- Cadillac ATS (2014-2016)
- Cadillac CTS (2014-2016)
- Cadillac XTS (2014-2016)
Note: Please provide your VIN upon purchase to ensure we load the correct, vehicle-specific software for a perfect match.
Frequently Asked Questions
Do I need to get this module programmed by a dealer?
No. We handle all the programming for you before shipment. Simply provide us with your vehicle’s VIN after purchase, and it will arrive ready to install with the latest GM software updates for your specific vehicle.
Is this a simple plug-and-play installation?
Yes, because we program it to your VIN, the installation is a straightforward mechanical swap. No special computer tools are required. Just disconnect the battery, swap the modules, and reconnect the battery. Some vehicles may require a simple key-cycle security relearn procedure.
Where do I find my vehicle’s 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 of the dashboard visible through the windshield.
What happens if I keep driving with a bad ECM?
Continuing to drive with a failing ECM can lead to more severe problems, including a complete no-start condition, potential damage to other electronic components, poor fuel efficiency, and unsafe driving conditions. It’s best to replace it promptly.
How can I be sure this part will fit my vehicle?
This ECM replaces several part numbers. You can verify fitment by matching your existing part number to our compatible list. The most reliable method is to provide your VIN, which allows us to guarantee it is programmed correctly for your exact model, engine, and options.