Programmed 2014-2016 Silverado 1500 ECM 12663391 | VIN Matched

### Programmed 2014-2016 Silverado 1500 ECM 12663391 \| VIN Matched   ### Is Your Truck’s Brain on the Fritz? Get a Reliable, Pre-Programmed Solution. As a technician with over two decades of experience, I’ve seen firsthand the frustration a failing Engine Control Module (ECM) can cause. Your 2014-2016 Silverado 1500 is a tough truck, but when its central computer starts acting up, it can lead to a cascade of baffling problems—from a persistent Check Engine Light to a vehicle that refuses to start. You’re left guessing, and a trip to the dealership often means a hefty bill for diagnostics and programming. This is the definitive solution. We’re offering a genuine GM Engine Control Module, part number **12663391**, that arrives at your door completely programmed to your truck’s specific Vehicle Identification Number (VIN). We handle the complex part—flashing the module with the latest, most stable software from General Motors—so you don’t have to. This isn’t just a replacement part; it’s a restoration of your vehicle’s core electronic nervous system, ensuring all components communicate just as the factory intended. #### Case Study: A Tricky Diagnosis I once had a 2015 Sierra 1500 in my bay with an issue that stumped two other shops. The truck would randomly stall at stoplights, but never threw a consistent code. After hours of checking wiring and sensors, I hooked up an oscilloscope to the ECM’s main processor. I discovered intermittent voltage drops deep inside the module itself—a classic sign of internal failure that a standard scan tool would miss. Replacing the ECM with a pre-programmed unit like this one solved the problem instantly. It’s often these internal, invisible faults that cause the most headaches. ### Is Your Truck Showing These Symptoms? A failing ECM can manifest in many ways. If you’re experiencing any of the following, this module is the likely solution your vehicle needs. - ✔ Check Engine Light is on with no obvious cause. - ✔ Vehicle has trouble starting or won’t start at all (no-crank or crank-no-start). - ✔ Noticeable decrease in fuel economy. - ✔ Engine stalling, stumbling, or running rough. - ✔ Transmission shifting erratically or harshly. - ✔ Diagnostic Trouble Codes (DTCs) related to internal processor failure (like P0601, P0606) or communication loss (U0100). - ✔ Failure to pass an emissions test. ## A Straightforward Guide to Your ECM Swap Installing your new **2014-2016 Silverado 1500 ECM** is a job most DIYers can handle. Since we’ve already done the programming, you can avoid a trip to the dealer. Just follow these general steps: 1. **Safety First:** Always disconnect the negative terminal from your truck’s battery and wait at least 10 minutes for the system to discharge. 2. **Locate the ECM:** On most 2014-2016 Silverado/Sierra models, the ECM is located in the front of the engine bay on the driver’s side, near the air filter housing. 3. **Disconnect Connectors:** Carefully release the locking tabs and unplug the wiring harness connectors from the old ECM. Inspect the connectors for any corrosion or damage. 4. **Remove the Old Module:** Unbolt the old ECM from its mounting bracket. It’s typically held in by a few bolts. 5. **Install the New Module:** Mount your new, pre-programmed ECM in place and secure the bolts. 6. **Reconnect Everything:** Plug the wiring harnesses back into the new module until they click securely. Reconnect the negative battery terminal. 7. **Perform Security Relearn:** You may need to perform a simple security relearn procedure, which can typically be done without special tools. This involves turning the key to the ‘ON’ position for 10-15 minutes. Instructions are readily available online for your specific model. ### Verified Vehicle Compatibility This module is a direct fit for a wide range of GM vehicles. Please verify your part number or match your vehicle from the list below. This unit is compatible with part numbers: **12692067**, **12676230**, **12656993**, **12662034**, **12672537**, **12673195**, **12663391**, **12672963**, **12669318**. SILVERADO 1500 PICKUP 14-15 Electronic Control Module; (LH front engine compartment) SILVERADO 1500 PICKUP 16 Electronic Control Module; (LH front engine compartment), ID **12662034**, **12672537**, or **12673195** SIERRA 1500 PICKUP 14-15 Electronic Control Module; (LH front engine compartment) SIERRA 1500 PICKUP 16 Electronic Control Module, (LH front engine compartment), ID **12662034**, **12672537**, or **12673195** SIERRA DENALI 1500 14-16 Electronic Control Module; (LH front engine compartment) TAHOE/SUBURBAN 1500 15-16 Electronic Control Module; (LH front engine compartment) YUKON/YUKON XL 1500 15-16 Electronic Control Module; (LH front engine compartment) ESCALADE/ESCALADE ESV 15-16 Electronic Control Module; (LH front engine compartment) CAMARO 16 Electronic Control Module; 6.2L CORVETTE 14-16 Electronic Control Module; (RH cowl under dash) CTS 14-15 Sdn, 3.6L CTS 16 3.6L (VIN 8) or 6.2L ATS 14-16 3.6L XTS 14-16 3.6L (VIN 8) COLORADO/CANYON 15-16 Electronic Control Module; 3.6L ### Frequently Asked Questions **Do I really need to provide my VIN?** Yes, absolutely. Providing your VIN is critical. We use it to load the exact, correct GM factory software for your truck’s specific configuration, including engine, transmission, and emissions equipment. This ensures perfect compatibility and function right out of the box. **Is this a plug-and-play part?** Yes, for the most part. Because we pre-program it with your VIN, you will not need a dealership scan tool for software flashing. However, on most GM vehicles, you will need to perform a simple security/anti-theft relearn procedure, which typically takes about 10-15 minutes and requires only your ignition key. **Will this fix my check engine light?** If the check engine light is caused by an internal failure of your original ECM (e.g., codes P0601-P0606), then yes, this will resolve the issue. However, if the light is on due to a bad sensor or wiring problem elsewhere on the vehicle, you will still need to diagnose and fix that separate issue. **What if I have a different part number on my old module?** This module, **12663391**, supersedes and is compatible with several older part numbers. Please check the compatibility list provided. As long as your original part number is on our list, this module will work perfectly as a replacement. **Is any other programming needed after installation?** No. The main engine and transmission operating software is fully loaded by us. The only potential step is the security relearn mentioned above. In some rare cases, a Crankshaft Position Variation (CASE) relearn may be needed, which can be done with many high-end consumer scan tools or by any professional mechanic. Please enter it in the payment notes and save to ensure we receive it. Orders without a VIN within our 2-business-day handling period may be canceled, as programming cannot proceed without it. ### Shipping - **Processing Time:** Reliably shipped within 2-3 business days. ### Warranty Enjoy peace of mind with a **one-year replacement warranty** on this part, effective from the date you receive it. Labor costs are not covered. If the part fails within the warranty period, we’ll replace it with a comparable unit or refund your purchase price, ensuring a hassle-free experience. **Return Address:** **Highway71autoparts** **9131 Highway 71 NE** **Spicer, MN, 56288**

• Manufacturer Part Number: 12663391
• Country/Region of Manufacture: United States
• Manufacturer Warranty: 1 Year
• Superseded Part Number: 12656993, 12662034, 12663391, 12669318, 12672963, 12673195, 12676230, 12672537
• Genuine OEM: Yes
• Interchange Part Number: 590-08396
• PartNumber: 590
• Model: Silverado 1500 Pickup
• Year: 2016
• Brand: GM
• superseded-part-number: 12676230 12656993 12662034 12672537 12673195,12663391
• Hardware Type: E92