Is Your Cadillac ELR Running Rough or Not Starting?
If you’re dealing with a persistent check engine light, erratic engine behavior, or a complete no-start condition in your 2014-2016 Cadillac ELR, a failing Engine Control Module (ECM) is a very likely culprit. As the central computer for your vehicle’s powertrain, when the ECM begins to fail, it can cause a cascade of frustrating and difficult-to-diagnose problems. I’ve seen it countless times in my shop: customers spend hundreds on other parts, only to find the issue was the ECM all along.
Real-World Diagnosis from the Shop Floor: “A customer’s 2015 ELR came in last week with intermittent stalling and a flurry of communication error codes on the scanner. Because it’s a range-extended EV, the initial thought was an issue with the complex high-voltage system. However, based on my experience with the GM Voltec platform, I checked the low-voltage network first. We found the ECM was intermittently dropping offline, causing the entire vehicle to panic. Replacing the ECM with a properly programmed unit solved every single issue. It’s a common misdiagnosis that can lead to very expensive, unnecessary repairs.”
The Dealership-Free Solution You Need
Forget the hassle and expense of towing your vehicle to a dealership. This Engine Control Module, part number 12670335, arrives at your door fully programmed to your vehicle’s specific VIN. We install the latest GM-certified software updates, ensuring your ELR operates with optimal efficiency, emissions control, and performance, just as the factory intended. This is a direct-fit, plug-and-play solution designed to get you back on the road quickly and affordably.
Why Choose Our 2014-2016 ELR Engine Module?
This isn’t just a replacement part; it’s a complete restoration of your vehicle’s core logic. By providing us with your VIN during checkout, you eliminate the need for expensive dealer-only programming tools.
- โ VIN-Programmed for Your ELR: We flash the module with the newest GM software matched precisely to your car’s VIN.
- โ Fixes Common Issues: A reliable solution for check engine lights (CEL), rough idle, poor fuel economy, stalling, and no-start conditions.
- โ No Dealer Visit Required: Save hundreds of dollars in programming fees and towing costs.
- โ Broad GM Compatibility: This module also serves as a direct replacement for a wide range of other GM vehicles, including the Volt, Cruze, Sonic, and more, ensuring a well-tested and reliable component.
- โ Direct Replacement Guarantee: Guaranteed to fit and function perfectly, replacing part numbers 12668866, 12668994, 12643636, and others listed in the fitment guide.
Plug-and-Play Installation: Get It Done in Your Driveway
Installing your new ECM is straightforward. While professional installation is always an option, many DIYers can handle this job with basic tools. In the ELR, the ECM is located in the left-hand rear of the engine compartment.
- Safety First: Disconnect the negative terminal from your 12V battery and secure it away from the post.
- Locate the ECM: Find the module in the LH rear of the engine bay. It will have several large electrical connectors attached.
- Disconnect Connectors: Carefully release the locking tabs on each wiring harness connector and pull them straight out. Never force them. Inspect the pins for any corrosion or damage.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket.
- Install the New Module: Bolt your new, pre-programmed ECM into place.
- Reconnect Everything: Firmly plug the wiring harnesses back into the new module until they click and the locking tabs are secure. Reconnect your battery terminal.
- Final Step: In some cases, a security or anti-theft relearn procedure may be required, which can typically be done without special tools. Instructions are readily available online for your specific model.
Don’t let a faulty computer keep your advanced Cadillac ELR off the road. Order this pre-programmed Engine Control Module today and restore the performance and reliability you expect.