Restore Peak Performance to Your Buick Encore
Is your 2013-2016 Buick Encore suffering from frustrating issues like a persistent check engine light, rough idling, stalling, or a complete no-start condition? These are classic signs of a failing Engine Control Module (ECM). As the brain of your vehicle, a faulty ECM can disrupt everything from fuel delivery and ignition timing to transmission shifting, leaving you with an unreliable and inefficient vehicle. This isn’t just an inconvenience; it’s a problem that needs a dependable solution. We offer a direct-fit, professionally programmed ECM that restores your vehicle’s original performance and reliability, getting you back on the road with confidence.
From the Diagnostic Bay
I remember a 2015 Encore that came into my shop with a complaint of intermittent stalling at stoplights and a flashing check engine light. The owner had already replaced the spark plugs and an ignition coil with no success. When I connected my scan tool, I found a P0606 (ECM/PCM Processor Fault) code along with several communication errors (U-codes). After verifying the wiring and power/ground circuits to the module were solid, it was clear the ECM’s internal processor was failing. Instead of a costly trip to the dealer, we installed one of our VIN-programmed modules. The entire process, including the security relearn, took under an hour. The Encore ran perfectly, the codes were gone, and the customer saved hundreds compared to the dealership quote. This is a common failure, and a pre-programmed module is the most efficient fix.
Is Your Encore Showing These Signs?
A failing ECM can manifest in various ways. If you’re experiencing any of the following, it’s a strong indicator that the engine computer may be the culprit. Look out for:
- ✔ Check Engine Light is illuminated with codes like P0601, P0606, or U0100.
- ✔ Vehicle refuses to start or has difficulty starting.
- ✔ Noticeable decrease in fuel economy.
- ✔ Engine stalling, sputtering, or running rough.
- ✔ Hesitation or stumbling during acceleration.
- ✔ Automatic transmission shifting erratically or harshly.
- ✔ Failure to pass state emissions testing.
A Straightforward Guide to Installation
Installing your new 2013-2016 Encore Engine Module is a manageable job for a confident DIYer or any professional technician. Our VIN-programming service makes this a plug-and-play repair.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the ECM: On most compatible vehicles like the Encore, the ECM is typically found in the engine bay, often mounted to the firewall or an inner fender.
- Disconnect and Remove: Carefully unplug the wiring harness connectors. They have locking tabs that need to be released. Once disconnected, unbolt the old module from its mounting bracket.
- Install the New Module: Mount the new ECM securely in place and reconnect the wiring harnesses. Ensure they click firmly into place.
- Reconnect Battery: Reattach the negative battery terminal.
- Perform Security Relearn: Most GM vehicles require a simple security relearn procedure. This can typically be done without special tools by turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times before starting the engine. Consult your vehicle’s service information for the exact procedure.
Verified Vehicle Compatibility
This module, part number 12668991, is a direct replacement for a wide range of GM vehicles. It is interchangeable with part numbers 12668866, 12668994, 12643636, 12663405, 12670335, 22819494, and 12692200. Please verify your vehicle is on the list below:
CHEVROLET CRUZE 12-16 (1.4L & Gasoline)
CHEVROLET SONIC 12-16 (1.4L)
CHEVROLET TRAX 13-16 (1.4L)
CHEVROLET SPARK 14-15 (Gasoline)
CHEVROLET VOLT 11-15 (Gasoline)
CADILLAC ELR 14-16 (Gasoline)
CHEVROLET EXPRESS 2500/3500 VAN 16 (4.8L, 6.0L)
GMC SAVANA 2500/3500 VAN 16 (4.8L, 6.0L)
CHEVROLET SILVERADO 2500/3500 PICKUP 12-16 (6.0L)
GMC SIERRA 2500/3500 PICKUP 12-16 (6.0L)
GMC SIERRA DENALI 2500/3500 12-16 (6.0L)
CHEVROLET SUBURBAN 3500 16
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) is essential. We use it to load the exact, correct GM factory software for your vehicle’s specific configuration. This ensures perfect compatibility and installs all the latest operational updates from the manufacturer, preventing common software-related issues.
Is this a simple plug-and-play part?
Yes, because we program the module to your VIN before shipping, it eliminates the need for expensive programming tools. After physical installation, you may only need to perform a simple key-based security relearn procedure, which can be done in your driveway.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the ECM (common codes P0601-P0606), then yes, this module will resolve the issue. It’s crucial to properly diagnose the problem first, as the light can also be triggered by faulty sensors or wiring.
How is this different from buying a used one from a junkyard?
A junkyard module will be programmed for a different vehicle and will not work correctly without being wiped and reprogrammed by a dealer. Our modules are tested, verified, and pre-programmed with the latest software for YOUR specific vehicle, saving you time, money, and hassle.
What if I have a different part number on my old module?
This module replaces several part numbers, including 12668866, 12668994, and 12643636, among others. As long as your vehicle model and year are listed in our compatibility chart, this module will function correctly once programmed to your VIN.