Is Your Truck Experiencing Mysterious Electrical Gremlins?
If your 2014-2016 GMC Sierra 1500 is suddenly running rough, refusing to start, or throwing a check engine light that just won’t go away, the problem might be deeper than a simple sensor. As the central computer for your engine, the Engine Control Module (ECM) is responsible for everything from fuel mixture and ignition timing to transmission shifting and emissions control. When it starts to fail, the symptoms can be confusing and widespread, often mimicking other issues.
Over my 20+ years in the shop, I’ve seen countless trucks come in with issues that stumped other mechanics, only to trace it back to a failing ECM. Heat, vibration, and age are the primary enemies of these complex electronics. Internal circuit board failures can lead to intermittent problems that are a nightmare to diagnose, costing you time and money on parts you don’t need.
A Real-World Diagnosis: “A customer’s 2015 Sierra 1500 came in last week with these exact symptoms. It had a persistent P0606 (ECM/PCM Processor Fault) code, would randomly stall at red lights, and the transmission was shifting erratically. The owner had already replaced two oxygen sensors and a throttle body to no avail. We connected our diagnostic equipment and noticed the live data stream from the ECM would freeze and drop out. After verifying all power and ground circuits to the module were solid, it was clear the ECM itself was the culprit. This isn’t an uncommon scenario; the ECM is the command center, and when it falters, the whole system suffers.”
The Direct-Fit, Programmed Solution
Don’t let a faulty ECM keep your truck sidelined. This Engine Control Module, part number 12669318, is the reliable, straightforward solution to restore your vehicle’s performance and dependability. The biggest hurdle with ECM replacement has always been the programmingโuntil now. In the past, you’d have to install the module and then have your truck towed to a dealership for expensive flashing. We eliminate that step entirely.
- โ VIN-Specific Programming: We flash this module with the latest official GM software using the Vehicle Identification Number (VIN) you provide. This ensures it communicates perfectly with your truck’s specific options and other onboard computers.
- โ Plug-and-Play Installation: Because the module arrives programmed, the physical installation is typically a simple bolt-in, plug-in process. No special tools or dealer visits are required for programming.
- โ Restored Performance: A new, properly functioning ECM will correct issues like poor fuel economy, rough idling, hard starting, and erratic engine behavior.
- โ Clear Communication: Resolves communication errors between the ECM and other modules (like the TCM or BCM), which can cause a cascade of warning lights and system malfunctions.
Confirming Your Part Number
It’s crucial to match the part number from your existing module to ensure compatibility. This ECM is a direct replacement for a wide range of original GM part numbers. Please check your original module for one of the following numbers:
Compatible Part Numbers: 12692067, 12676230, 12656993, 12662034, 12672537, 12673195, 12663391, 12672963, and 12669318.
Extensive GM Vehicle Compatibility
While this is a primary part for the Sierra 1500, GM used this versatile module across a wide array of its vehicle lineup. Please verify your specific model and options below. The location of the module can vary, as noted.
Trucks & SUVs:
- โ GMC Sierra 1500 / Sierra Denali 1500 (2014-2016): Located in the LH front engine compartment.
- โ Chevrolet Silverado 1500 (2014-2016): Located in the LH front engine compartment.
- โ GMC Canyon (2015-2016): 3.6L, located on the RH firewall.
- โ Chevrolet Colorado (2015-2016): 3.6L, located on the RH firewall.
- โ Cadillac Escalade / Escalade ESV (2015-2016): Located in the LH front engine compartment.
- โ GMC Yukon / Yukon XL 1500 (2015-2016): Located in the LH front engine compartment.
- โ Chevrolet Tahoe / Suburban 1500 (2015-2016): Located in the LH front engine compartment.
Cars:
- โ Cadillac ATS (2014-2016): 3.6L, located in the LH engine compartment.
- โ Cadillac CTS (2014-2016): 3.6L or 6.2L, sedan models.
- โ Cadillac XTS (2014-2016): 3.6L (VIN 8, opt LF3).
- โ Chevrolet Camaro (2016): 6.2L.
- โ Chevrolet Corvette (2014-2016): Located on the RH cowl under the dash.
IMPORTANT: After your purchase, please send us a message with your vehicle’s 17-digit VIN. We cannot ship your order until we have this information to perform the essential programming service.