Restore Peak Performance to Your Cadillac XTS
Is your 2014-2016 Cadillac XTS running rough, stalling unexpectedly, or displaying a persistent Check Engine Light? These are classic signs of a failing Engine Control Module (ECM). As the brain of your vehicle’s engine, a faulty ECM can cause a cascade of frustrating and difficult-to-diagnose problems, from poor fuel economy to a complete no-start condition. In my 20+ years of automotive diagnostics, I’ve seen countless drivers spend a fortune chasing symptoms when the root cause was the ECM itself. This isn’t just a part; it’s the central command for your engine’s performance and reliability.
We take the guesswork and high costs out of the repair. This is a direct-fit replacement 2014-2016 XTS Engine Module that arrives at your door pre-programmed with the latest official GM software updates. All we need is your vehicle’s VIN at checkout. This critical step ensures seamless communication between the module and your specific vehicle, eliminating the need for an expensive trip to the dealership for programming. You get a reliable, plug-and-play solution that restores your vehicle’s original functionality.
Case Study: A Tricky Diagnosis
A customer brought in a 2015 Cadillac XTS 3.6L with an intermittent stalling problem and a check engine light. The codes were all over the place—U0100 (Lost Communication with ECM), P0606 (ECM Processor Fault), and a few random misfire codes that would come and go. We checked the wiring and grounds, which were solid. After spending hours chasing phantom issues, experience pointed to the ECM itself. The internal processor was failing under heat, causing the communication drops. Instead of a costly new module from the dealer plus programming fees, we installed one of our VIN-programmed units. The car started instantly, all communication was restored, and the customer was back on the road for a fraction of the dealership’s quote. This is the exact solution we offer you.
Is Your Cadillac Showing These Signs?
- ✔ Check Engine Light is on with communication-related trouble codes (e.g., U0100, P0601, P0606).
- ✔ The engine cranks but refuses to start.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Rough idling, stalling, or hesitation during acceleration.
- ✔ Transmission shifting erratically or getting stuck in gear.
- ✔ Apparent loss of power and poor overall performance.
A Straightforward Guide to Installation
- ✔ 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 2014-2016 XTS with the 3.6L engine, the ECM is typically located in the engine compartment. Consult your owner’s manual or a service guide for the exact position.
- ✔ Disconnect and Remove: Carefully unplug the wiring harness connectors. They have locking tabs that need to be released. Once disconnected, unbolt the old module from its mounting bracket.
- ✔ Install the New Module: Bolt your new, pre-programmed ECM into place. Reconnect the wiring harnesses, ensuring they click securely into position.
- ✔ Reconnect and Start: Reconnect the negative battery terminal. The vehicle may require a security relearn procedure, which can often be completed by turning the key to the ‘ON’ position for 10-15 minutes before starting the engine. Your vehicle is now ready to go!
Verified Vehicle Compatibility
This module is a direct replacement for part numbers 12692067, 12676230, 12656993, 12662034, 12672537, 12673195, 12663391, 12672963, and 12669318. It is guaranteed to fit the following models and configurations:
ATS 15 (LH engine compartment), 3.6L
ATS 16 (LH engine compartment), 3.6L, VIN Y (8th digit, opt LF4)
CAMARO 16 6.2L
CANYON 15-16 (RH firewall), 3.6L
COLORADO 15-16 (RH firewall), 3.6L
CORVETTE 14-16 (RH cowl under dash)
CTS 14-15 Sdn, 3.6L
CTS 16 3.6L, VIN 8 (8th digit, opt LF3)
CTS 16 6.2L
ESCALADE 15-16 (LH front engine compartment)
ESCALADE ESV 15-16 (LH front engine compartment)
SIERRA 1500 PICKUP 14 (LH front engine compartment)
SIERRA 1500 PICKUP 15 (LH front engine compartment)
SIERRA 1500 PICKUP 16 (LH front engine compartment), ID 12662034, 12672537, or 12673195
SIERRA DENALI 1500 14-16 (LH front engine compartment)
SILVERADO 1500 PICKUP 14-15 (LH front engine compartment)
SILVERADO 1500 PICKUP 16 (LH front engine compartment), ID 12662034, 12672537, or 12673195
SUBURBAN 1500 15-16 (LH front engine compartment)
TAHOE 15-16 (LH front engine compartment)
XTS 14-16 (3.6L), VIN 8 (8th digit, opt LF3)
YUKON 15-16 (LH front engine compartment)
YUKON XL 1500 15-16 (LH front engine compartment)
Frequently Asked Questions
What do you mean by ‘programmed to my VIN’?
When you provide your Vehicle Identification Number (VIN), we load the precise factory software and calibrations for your specific vehicle onto the module. This ensures it works perfectly with your engine, transmission, and options, just like the original part from the factory.
Will I need to do anything else after installing it?
No additional programming is required. In most cases, it’s a direct installation. Some vehicles may require a simple, key-on security relearn procedure that takes about 10-15 minutes and requires no special tools.
Is this a new or used part?
This is a high-quality, inspected, and tested OEM component, guaranteed for functionality. We ensure each module meets strict performance standards before programming and shipping it to you.
What if my part number isn’t listed but my vehicle is?
The part numbers listed (e.g., 12669318, 12672537) are often interchangeable. As long as your vehicle model, year, and engine match our fitment list, this module will be the correct, programmed replacement for your car.
How long does the programming process take?
The programming is completed after your purchase and before we ship. Simply provide your VIN during or after checkout, and we handle the rest, ensuring a fast turnaround so you can get your part quickly.