Restore Your Cadillac’s Core Performance and Reliability
Is your 2014-2016 Cadillac XTS experiencing frustrating issues like a persistent check engine light, rough idling, stalling, or a complete no-start condition? These are classic signs that the very brain of your engine—the Engine Control Module (ECM)—may be failing. As a technician with over two decades of experience, I’ve seen how a faulty ECM can turn a reliable vehicle into a source of constant headaches. This isn’t just an inconvenience; it affects fuel economy, emissions, and overall drivability. We offer a dependable solution: a genuine GM Engine Control Module, part number 12673195, delivered to your door fully programmed and ready for installation.
The biggest hurdle for any DIY enthusiast or even a professional shop when replacing an ECM is the programming. A blank module from the dealership is just a metal box; it requires expensive, specialized tools and subscriptions to make it communicate with your specific vehicle. We eliminate that entire process. Simply provide us with your Vehicle Identification Number (VIN) during checkout, and my team will flash this module with the latest, most stable GM-approved software for your exact vehicle. This ensures all systems, from the transmission to the fuel injectors, operate precisely as the manufacturer intended. You get a direct-fit, plug-and-play solution without the dealership price tag or hassle.
Case Study: A Tricky Diagnosis
I remember a 2015 Sierra 1500 that came into the bay with a bizarre set of symptoms. The owner complained of intermittent stalling at stoplights and a transmission that seemed to shift harshly for no reason. There were no transmission-specific codes, only a generic P0606 (ECM/PCM Processor Fault). We checked all the usual suspects—wiring, grounds, sensor inputs—and everything looked perfect. After hours of diagnostics, we decided to swap in a known-good, programmed ECM. Instantly, the problems vanished. The original module had an internal processor failure that only manifested under specific load conditions, corrupting the data it was sending to the transmission controller. It’s a perfect example of how a failing 2014-2016 XTS ECM (or its equivalent in other GM models) can cause symptoms that seem completely unrelated.
Common Signs of a Failing Engine Control Module
If your vehicle is showing any of these symptoms, a faulty ECM could be the culprit. A proper diagnosis is key, but these are strong indicators I’ve seen hundreds of times in the shop.
- ✔ Check Engine Light is illuminated with codes like P0601, P0602, P0606, or U-series communication codes.
- ✔ The engine cranks but refuses to start.
- ✔ Noticeable drop in fuel efficiency.
- ✔ Rough or unpredictable engine performance, including stalling and misfires.
- ✔ Automatic transmission shifting issues, such as harsh or delayed shifts.
- ✔ Communication problems with diagnostic scan tools.
A Straightforward Guide to Installation
Replacing the 2014-2016 XTS ECM is a manageable job for a confident DIYer. Since we handle the programming, you just need to perform the physical swap.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes to ensure all systems are powered down.
- Locate the ECM: On the Cadillac XTS, the ECM is typically found in the engine bay. Consult a vehicle-specific repair manual for the exact location, but it’s often on the firewall or inner fender.
- Disconnect the Wiring: Carefully unlatch and remove the electrical connectors from the old module. Inspect the pins for any corrosion or damage.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket. Keep the hardware as you will need it for the new module.
- Install the New Module: Mount your new, pre-programmed ECM onto the bracket and securely fasten it.
- Reconnect Everything: Plug the wiring harnesses back into the new module until they click into place. Reconnect the negative battery terminal.
- Final Steps: Depending on your vehicle, a security or anti-theft relearn procedure may be necessary. This can often be done without special tools by cycling the key. Your vehicle’s service manual will have the specific steps.
Verified Vehicle Compatibility
This module is a direct replacement for part number 12673195 and is also compatible with a wide range of other GM part numbers and vehicles. Please verify your part number or match your vehicle from the list below. Our VIN programming ensures it works for your specific application.
CADILLAC ATS 14-16 (3.6L)
CADILLAC CTS 14-16 (3.6L, 6.2L)
CADILLAC ESCALADE & ESV 15-16
CHEVROLET CAMARO 16 (6.2L)
CHEVROLET COLORADO 15-16 (3.6L)
CHEVROLET CORVETTE 14-16
CHEVROLET SILVERADO 1500 PICKUP 14-16
CHEVROLET SUBURBAN 1500 15-16
CHEVROLET TAHOE 15-16
GMC CANYON 15-16 (3.6L)
GMC SIERRA 1500 & DENALI 1500 14-16
GMC YUKON & YUKON XL 1500 15-16
This module replaces part numbers: 12692067, 12676230, 12656993, 12662034, 12672537, 12673195, 12663391, 12672963, 12669318.
Frequently Asked Questions
Frequently Asked Questions
Do I need to do any programming after I receive this 2014-2016 XTS ECM?
No. We program the module to your car’s VIN before shipping it. In most cases, it is a plug-and-play installation, although some vehicles may require a simple key relearn procedure that you can do yourself.
What information do you need from me?
We need your vehicle’s 17-digit VIN (Vehicle Identification Number) to load the correct GM-certified software for your specific car and its options. Please provide it during or after checkout.
Is this a used part?
This is a high-quality, inspected, and tested recycled OEM part. We ensure it meets or exceeds original performance standards and back it with a warranty. Using genuine OEM hardware is critical for long-term reliability.
Will this fix my check engine light?
If the check engine light is caused by a faulty ECM (e.g., codes P0601, P0606), this part will resolve the issue. However, you must ensure other potential problems, like faulty sensors or wiring, have been ruled out through proper diagnosis.
How do I find my current ECM part number?
The part number is printed on a sticker on the module itself. However, as long as your vehicle is on our compatibility list, our VIN programming service guarantees it will work, even if the part number is slightly different from your original.