Restore Your Vehicle’s Performance and Reliability
Is your Chevrolet Spark, Cruze, or Sonic suddenly acting up? A check engine light that won’t go away, rough idling, stalling, or a frustrating no-start condition can often point to one critical component: the Engine Control Module (ECM). As the central computer of your vehicle, the ECM manages everything from fuel injection and ignition timing to transmission shifts and emissions control. When it fails, it can create a cascade of confusing and performance-robbing problems. In my 20+ years of hands-on diagnostics, I’ve seen countless drivers chase expensive sensor replacements when the root cause was a faulty ECM all along.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take the guesswork and high costs out of the equation by pre-programming this genuine GM ECM specifically to your vehicle’s Vehicle Identification Number (VIN). This means it arrives at your door with the latest factory software updates, ready to communicate perfectly with all the other modules in your car. You get a reliable fix that restores factory performance and efficiency without the need for an expensive trip to the dealership for programming.
A Technician’s Notebook: The Intermittent Stall Mystery
A customer brought in a 2015 Chevy Sonic with a problem that was driving them crazy: it would stall intermittently at stoplights, but never set a check engine light. We checked fuel pressure, scanned for codes (none stored), and inspected for vacuum leaks. Everything looked perfect. On a hunch, I monitored the live data stream from the ECM and noticed that the command for the electronic throttle body would occasionally drop out for a split second—just long enough to stall the engine but not long enough to trigger a fault code. This kind of internal processing glitch is a classic sign of a failing ECM. We installed one of these VIN-programmed modules, and the problem was solved instantly. The car ran flawlessly, proving that sometimes the ‘brain’ itself is the issue.
Why Choose a Pre-Programmed 2014-2015 Spark Engine Module?
A modern vehicle’s ECM is more than just a simple circuit board; it’s a sophisticated computer that needs to be perfectly matched to your car’s specific options and security systems. Simply swapping a used module from another vehicle will almost always result in a no-start condition due to anti-theft protocols. Our service eliminates this critical barrier. By providing your VIN at checkout, you ensure that the module you receive is a direct, plug-and-play fit, loaded with the correct software to get you back on the road quickly and confidently.
Common Signs of a Failing ECM
- ✔ Check Engine Light (CEL) is illuminated, often with codes like P0601, P0606, or U0100.
- ✔ The engine cranks but refuses to start.
- ✔ Unexplained drop in fuel economy.
- ✔ Noticeable loss of power and poor acceleration.
- ✔ Rough or erratic idling and stalling.
- ✔ Automatic transmission shifts harshly or at the wrong times.
- ✔ Failure to pass state emissions testing.
A Straightforward Guide to Installation
- ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery and wait a few minutes to ensure all systems are powered down.
- ✔ Locate the ECM: On most compatible models, the ECM is found in the engine bay. Consult your vehicle’s service manual for the exact location.
- ✔ Disconnect Connectors: Carefully release the locking tabs on the wiring harness connectors and pull them straight out from the old module. Avoid pulling on the wires themselves.
- ✔ Remove the Old Module: Unbolt the old ECM from its mounting bracket. Keep the mounting hardware, as you will need it for the new unit.
- ✔ Install the New Module: Mount your new, pre-programmed ECM onto the bracket and secure it with the original hardware.
- ✔ Reconnect Everything: Firmly plug the wiring harnesses into the new module until they click into place. Reconnect the negative battery terminal.
- ✔ Final Steps: Start the vehicle. It may run a little rough for the first few minutes as it completes an idle relearn procedure. Let it idle for 5-10 minutes before driving.
Verified Vehicle Compatibility
This module is a direct replacement for part number 12663405 and is interchangeable with part numbers 12668866, 12668994, 12643636, 12670335, 22819494, and 12692200. It is guaranteed to fit the following gasoline models:
ENCORE 13-16 (1.4L)
Cadillac:
ELR 14-16
Chevrolet:
CRUZE 12-16 (Gasoline models, including 1.4L & Limited)
EXPRESS 2500/3500 VAN 16 (4.8L, 6.0L)
SILVERADO 2500/3500 PICKUP 12-16 (6.0L)
SONIC 12-16
SPARK 14-15 (Gasoline model)
SUBURBAN 3500 16
TRAX 13-16
VOLT 11-15
GMC:
SAVANA 2500/3500 VAN 16 (4.8L, 6.0L)
SIERRA 2500/3500 PICKUP 12-16 (6.0L)
SIERRA DENALI 2500/3500 12-16 (6.0L)
Frequently Asked Questions
What is VIN programming and why do I need it?
VIN programming is the process of loading your vehicle’s specific software and security information onto the Engine Control Module. Without it, the module won’t be able to communicate with your car’s other systems, leading to a no-start condition. We handle this for you before shipping.
Do I need any special tools to install this?
No special tools are required. Basic hand tools like a socket set to remove the module and disconnect the battery are all you typically need. Our pre-programming service eliminates the need for expensive scan tools or programming equipment.
Is this a simple plug-and-play installation?
Yes! Because we program the module to your VIN before it ships, the installation is a direct swap. Just disconnect the old module and connect the new one. In some cases, a simple idle relearn procedure (letting the car idle for a few minutes) is all that’s needed afterward.
My original part number is slightly different but on your list. Will this work?
Absolutely. The part numbers listed (like 12668866, 12643636, etc.) are all interchangeable and superseded by this module. As long as your vehicle is on the compatibility list, this part is the correct, updated replacement.
How soon will my part ship after I order?
We program and ship your module promptly after receiving your order and VIN. Please be sure to provide your VIN in the notes at checkout or send us a message immediately after purchase to avoid any delays.