Restore Peak Performance to Your GM Truck or SUV
Is your 2015-2016 Chevrolet Suburban 1500 running rough, stalling unexpectedly, or showing a persistent Check Engine Light? These are classic signs of a failing Engine Control Module (ECM), the computer that serves as your vehicle’s brain. A faulty ECM can cripple your engine’s performance, fuel economy, and reliability. In my 20+ years of automotive diagnostics, I’ve seen firsthand how a failing module can cause frustrating, hard-to-diagnose issues that leave drivers stranded. Don’t let a bad ECM dictate your vehicle’s health.
This is your direct-fit, reliable solution. We offer a genuine OEM Engine Control Module, part number 12669318, that comes professionally programmed to your vehicle’s specific Vehicle Identification Number (VIN). We load it with the very latest software updates from General Motors, ensuring all factory improvements for drivability and performance are applied. This isn’t just a replacement part; it’s a complete restoration of your engine’s command center, ready for installation right out of the box.
Case Study: A Tricky Diagnosis
A customer brought in a 2015 Sierra with an intermittent no-start condition and a random stalling problem that two other shops couldn’t solve. There were no hard codes, just a few communication loss (U-codes) histories. After ruling out fuel and spark, I focused on the ECM. On the surface, it seemed fine. But by monitoring live data during a long test drive, I saw the 5-volt reference signal intermittently drop out for a split second—just enough to shut the engine down without setting a specific code. Heat soak was causing an internal failure in the ECM’s processor. We replaced it with a VIN-programmed module like this one, and the truck has been running flawlessly for over a year. These intermittent issues are often the sneakiest signs of ECM failure.
Is Your Vehicle Showing These Symptoms?
- ✔ Check Engine Light is illuminated
- ✔ Engine stalls, stumbles, or misfires
- ✔ Vehicle won’t start or is hard to start
- ✔ Poor fuel economy
- ✔ Shifting problems with the automatic transmission
- ✔ Communication error codes, such as U0100 (Lost Communication With ECM/PCM)
- ✔ Internal module failure codes, like P0601 or P0606
A Straightforward Guide to Installation
Installing your new 2015-2016 Suburban ECM is a manageable job for a DIY enthusiast. Since we handle the programming, you can skip the expensive trip to the dealership. Follow these general steps for a successful installation:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait at least 15 minutes to allow all modules to power down completely.
- Locate the ECM: On most GM trucks and SUVs like the Suburban, Tahoe, 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 terminals for any corrosion or damage.
- Remove the Module: Unbolt the old ECM from its mounting bracket. It’s typically held in by a few bolts.
- Install the New ECM: Mount your new, pre-programmed ECM in place and tighten the bolts. Reconnect the electrical connectors, ensuring they click securely into place.
- Reconnect Battery: Reattach the negative battery terminal.
- Perform Relearn Procedure: While not always required, some vehicles may need a security or crank variation relearn. This can often be done with a simple key-on/key-off procedure or may require a capable scan tool. Consult a service manual for your specific vehicle’s needs.
Verified Vehicle Compatibility
This module is a direct replacement for part number 12669318 and is interchangeable with several other GM part numbers, including: 12692067, 12676230, 12656993, 12662034, 12672537, 12673195, 12663391, and 12672963. It fits a wide range of GM vehicles. Please verify your part number or contact us with your VIN to confirm fitment. Key models include:
- ✔ 2015-2016 Chevrolet Suburban 1500
- ✔ 2014-2016 Chevrolet Silverado 1500
- ✔ 2015-2016 Chevrolet Tahoe
- ✔ 2014-2016 GMC Sierra 1500 / Sierra Denali 1500
- ✔ 2015-2016 GMC Yukon / Yukon XL 1500
- ✔ 2015-2016 Cadillac Escalade / ESV
- ✔ 2014-2016 Cadillac CTS, ATS, XTS (specific engines)
- ✔ 2014-2016 Chevrolet Corvette
- ✔ 2016 Chevrolet Camaro (6.2L)
- ✔ 2015-2016 Chevrolet Colorado / GMC Canyon (3.6L)
Frequently Asked Questions
How does the VIN programming process work?
After you complete your purchase, you will need to provide us with your vehicle’s 17-digit VIN. Our technicians use this number to access the latest GM-certified software for your exact vehicle configuration and flash it onto the module before shipping. This ensures it works correctly with your engine, transmission, and options.
Is this a simple plug-and-play installation?
Yes, for the vast majority of vehicles. Because we program the module to your VIN, it eliminates the need for dealer-level programming tools. In some rare cases, a security relearn or crank position sensor relearn may be necessary, which can often be done without special tools.
Will this fix my specific problem?
This module will correct issues directly caused by a faulty ECM, such as internal processor errors (P0606), memory faults (P0601), or hardware failure. While it resolves the most common symptoms, it’s essential to ensure your vehicle has been properly diagnosed. This part will not fix problems related to other failed sensors or wiring issues.
Do I need to send my old ECM back (core charge)?
This listing does not require a core return. You can keep your old module. This saves you the time and hassle of shipping a part back to us.
What makes your module better than one from a local parts store?
Most auto parts stores sell ‘blank’ modules that still require expensive programming at a dealership or specialized shop. Our service bundles the part and the expert programming into one package, saving you time, money, and the headache of coordinating the repair.