Restore Peak Performance to Your GM Vehicle
As a technician with over two decades of diagnostic experience, I’ve seen firsthand how a failing Engine Control Module (ECM) can turn a reliable vehicle into a source of constant frustration. If your Cadillac XTS, Silverado, or other compatible GM vehicle is experiencing baffling issues like stalling, erratic shifting, poor fuel economy, or a persistent Check Engine Light, the ECM is often the culprit. This isn’t just a part; it’s the central computer of your engine, and when it falters, everything else does too. This isn’t just a replacement part; it’s a direct solution to restore your vehicle’s factory-spec performance and reliability.
We take the guesswork and hassle out of the repair. This genuine GM Engine Control Module, part number 12672537, arrives at your doorstep programmed with the latest official GM software updates. All we need is your vehicle’s VIN at checkout. This critical step ensures the module communicates flawlessly with your car’s specific systems, from the transmission to the fuel injectors. By providing a pre-programmed module, we eliminate the need for an expensive trip to the dealership for programming, saving you significant time and money. This is the smart, efficient fix for both professional mechanics and dedicated DIYers looking for a dependable repair.
From the Diagnostic Bay
I remember a 2015 Cadillac XTS that came into my shop with a complaint of intermittent stalling at stoplights and a check engine light that other shops couldn’t solve. They had already replaced the throttle body and a few sensors, but the problem persisted. The codes were all over the place—communication errors (U-codes) and random misfires. After checking the wiring harness for integrity, I focused on the ECM. On the surface, it looked fine, but under load, the processor was failing. We swapped in a pre-programmed 2014-2016 XTS Engine Control Module like this one. The difference was immediate. The engine idled smoothly, the codes cleared, and the stalling vanished. It’s a classic case where chasing symptoms costs more than fixing the root cause.
Is Your Vehicle Showing These Symptoms?
A failing ECM can manifest in numerous ways. If you’re noticing any of the following, it might be time for a replacement:
- ✔ Unexplained Check Engine Light (CEL)
- ✔ Common trouble codes like P0601 (Internal Control Module Memory Check Sum Error) or P0606 (ECM/PCM Processor Fault)
- ✔ Vehicle won’t start or is difficult to start
- ✔ Poor engine performance, hesitation, or stumbling
- ✔ Decreased fuel efficiency
- ✔ Transmission shifting issues or harsh shifts
- ✔ Communication errors with other vehicle modules
A Straightforward Guide to Installation
Replacing your 2014-2016 XTS Engine Control Module is a manageable job for a confident DIYer. While the exact location varies by model (see fitment list), the general process is similar.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait a few minutes for the system to discharge completely.
- Locate the ECM: On most listed vehicles, the ECM is found in the engine compartment, either on the firewall or inner fender. On the Corvette, it’s located on the RH cowl under the dash.
- Disconnect Connectors: Carefully unclip the wiring harness connectors from the old module. These usually have a locking tab that needs to be released. Avoid pulling on the wires themselves.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket. Keep the hardware, as you may need to reuse it.
- Install the New Module: Bolt your new, pre-programmed ECM into place.
- Reconnect Everything: Firmly re-seat the wiring harness connectors until they click into place. Reconnect the negative battery terminal.
- Final Steps: Some vehicles may require a security relearn or crank position sensor relearn procedure, which can often be done without a scan tool. Check your vehicle’s service manual for specific instructions. Start the engine and check for proper operation.
Verified Vehicle Compatibility
This module is a direct-fit replacement for a wide range of GM vehicles and supersedes multiple part numbers, ensuring you get the correct, updated component. Please verify your vehicle and options from the list below. This part is compatible with part numbers: 12692067, 12676230, 12656993, 12662034, 12672537, 12673195, 12663391, 12672963, 12669318.
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 14-15 (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
Why do you need my VIN?
Your VIN (Vehicle Identification Number) is essential for us to program the ECM with the exact software and calibrations for your specific vehicle’s engine, transmission, and options. This ensures seamless integration and proper function, just like a new module from the dealer.
Is this a simple plug-and-play installation?
For most vehicles, yes. Because we program it to your VIN, it eliminates the most difficult step. In some cases, a simple, tool-free “security relearn” procedure may be needed after installation, which typically involves a sequence of key turns. We recommend consulting your service manual for any model-specific final steps.
Will this fix my specific problem?
This 2014-2016 XTS Engine Control Module is the definitive solution for failures within the module itself, which cause the symptoms listed above. However, proper diagnosis is key. Ensure you or your mechanic have ruled out other potential issues like bad wiring or faulty sensors before ordering.
Does this module come with a warranty?
Yes, all our electronic modules come with a warranty that covers defects in the part itself. We stand by the quality of our products to give you peace of mind with your purchase.
What if my part number isn’t listed?
The part numbers provided (12672537, 12692067, etc.) are the most common, and this module often supersedes older numbers. If you’re unsure, contact us with your VIN, and our expert team can verify compatibility for you.