Is Your GM Truck or Van Running Poorly?
If you’re dealing with a persistent check engine light, erratic engine behavior, stalling, or a no-start condition in your 2012-2016 Silverado, Sierra, or Express/Savana van, a failing Engine Control Module (ECM) is a very likely culprit. The ECM is the central computer, the ‘brain’ of your vehicle’s engine management system. It controls everything from fuel injection and ignition timing to transmission shifting and emissions. When it fails, it can cause a cascade of frustrating and difficult-to-diagnose problems.
From the Diagnostic Bay
We recently had a 2014 Silverado 2500 with the 6.0L V8 towed to the shop. The customer had spent weeks chasing a ghost, replacing spark plugs, ignition coils, and even the fuel pump trying to solve an intermittent stalling and hard-starting issue. The truck would throw a variety of codes that didn’t seem related. After verifying all power and ground circuits to the ECM were intact, we identified the module itself as the point of failure. Instead of a costly trip to the dealer, we installed a VIN-programmed module just like this one. The truck fired up immediately and ran smoother than it had in years. This single part solved a problem that had cost the owner significant time and money in unnecessary repairs.
Common Symptoms of a Failing ECM
- ✔ Unexplained Check Engine Light (CEL) with codes like P0601, P0606, or other internal processor faults.
- ✔ Drastic decrease in fuel economy.
- ✔ Engine stalling, stumbling, or misfiring for no apparent reason.
- ✔ Harsh or delayed automatic transmission shifting.
- ✔ Complete no-start condition where the engine cranks but will not fire.
- ✔ Loss of communication with diagnostic scan tools.
- ✔ Issues with other electronic modules, as the ECM is a central communication hub.
The Plug-and-Play Solution: A Pre-Programmed 2012-2016 Silverado ECM
Don’t let a faulty computer keep your truck off the road. This Engine Control Module is the definitive solution, arriving at your door fully programmed and ready for installation. We take the guesswork and dealership hassle out of the equation. Using the Vehicle Identification Number (VIN) you provide, we flash the module with the latest, most stable software updates directly from GM. This ensures perfect compatibility and can even resolve underlying drivability issues that were present from the factory.
This unit is a direct replacement for multiple GM part numbers, including 12668866, 12668994, 12643636, 12663405, 12670335, 22819494, and 12692200, guaranteeing a perfect fit and function for a wide range of vehicles.
Installation is Straightforward
Replacing the ECM is typically a simple process. It’s located in the engine compartment (usually on the driver’s side) and is held in by a few bolts with electrical connectors. Once installed, most vehicles will start and run immediately. Some may require a simple, key-on/key-off security relearn procedure to sync the new ECM with your vehicle’s anti-theft system. This procedure does not require special tools and we can provide instructions.
Complete Vehicle Fitment List
This module is compatible with a wide array of GM vehicles. Please verify your model and options below:
- CHEVROLET SILVERADO 2500/3500 PICKUP (2012-2016) – 6.0L
- GMC SIERRA 2500/3500 PICKUP (2012-2016) – 6.0L
- GMC SIERRA DENALI 2500/3500 (2012-2016) – 6.0L
- CHEVROLET EXPRESS 2500/3500 VAN (2016) – 4.8L, 6.0L
- GMC SAVANA 2500/3500 VAN (2016) – 4.8L, 6.0L
- CHEVROLET SUBURBAN 3500 (2016)
- CHEVROLET CRUZE (2012-2016) – 1.4L & Gasoline models
- CHEVROLET SONIC (2012-2016) – 1.4L
- CHEVROLET TRAX (2013-2016) – 1.4L
- CHEVROLET SPARK (2014-2015) – Gasoline model
- CHEVROLET VOLT (2011-2015)
- CADILLAC ELR (2014-2016)
- BUICK ENCORE (2013-2016) – 1.4L
Frequently Asked Questions
Do I need to program this module?
No. This is the main benefit of our service. We professionally program the module to your vehicle’s specific VIN before it ships. It arrives ready to install.
Where do I provide my VIN?
After you complete your purchase, simply reply to your order confirmation email with your 17-digit Vehicle Identification Number (VIN). We cannot ship your part until we receive this information.
What is a security relearn?
A security relearn, or anti-theft relearn, is a simple procedure that synchronizes the new ECM with your vehicle’s existing keys and security system. It typically involves a sequence of turning the ignition on for 10 minutes, off for 10 seconds, and repeating three times. We can provide specific instructions for your vehicle.
Will this fix my specific problem?
If your vehicle has been correctly diagnosed with a faulty ECM, this part is the correct solution. It will resolve issues directly caused by the computer, such as internal processor faults, driver circuit failures, and communication errors.
Is this compatible with my original part number?
Yes, this module is a direct replacement for a range of part numbers, including 12668866, 12668994, 12643636, 12663405, and others listed in the description. It will function identically to the original.