Is your Buick Verano, or another compatible GM vehicle, suffering from perplexing engine problems? Issues like a persistent check engine light, poor fuel economy, stalling, or a no-start condition often point to a failing Engine Control Module (ECM). The ECM is the central computer of your vehicle, managing everything from fuel injection and ignition timing to transmission shifting. When it fails, the entire vehicle’s performance and reliability are compromised. This is not just an inconvenience; it’s a critical component failure that needs immediate attention.
We offer a dependable and cost-effective solution: a genuine, used GM Engine Control Module, part number 12655007 (also compatible with 12653998, 12633555, and 12644446). The most significant advantage of our service is that we professionally program the module to your vehicle’s specific Vehicle Identification Number (VIN) before it ever leaves our facility. This means you receive a component that is ready for installation, saving you the time, expense, and hassle of a trip to the dealership for programming.
From the Diagnostic Bay
We had a 2014 Chevy Malibu come in with a complaint of intermittent stalling at stoplights and a check engine light that would come and go. The owner had already replaced the spark plugs and an ignition coil with no success. Our diagnostics pulled codes related to module communication errors. After testing the wiring harnesses, we isolated the issue to an internally failing ECM. Instead of a costly new unit from the dealer, we sourced a quality used module like this one. We programmed it to the car’s VIN, installed it, performed the security relearn, and the car ran perfectly. The customer saved hundreds of dollars and was back on the road the same day.
Common Symptoms of a Failing ECM
- ✔ Persistent Check Engine Light (CEL) with various trouble codes
- ✔ Engine stalling or misfiring unexpectedly
- ✔ Noticeable decrease in fuel efficiency
- ✔ Difficulty starting the engine or a complete no-start condition
- ✔ Rough or erratic idling
- ✔ Poor acceleration and overall engine performance
- ✔ Automatic transmission shifting problems
Why Choose Our 2013-2016 Verano ECM?
Choosing the right replacement part is crucial for your vehicle’s health. Our 2013-2016 Verano ECM is a tested, fully functional unit sourced from a salvaged vehicle. The key is our in-house programming service. By providing your VIN during checkout, you ensure that the module you receive is loaded with the latest GM software updates specific to your car’s make, model, and options. This plug-and-play approach eliminates the most common hurdle in module replacement.
Installation is straightforward for a competent DIYer or any professional mechanic. Once installed, you may need to perform a simple security relearn procedure (often called a ‘key-on/key-off’ cycle), which can typically be done without special tools. This synchronizes the new ECM with your vehicle’s anti-theft system. By bypassing the dealership’s programming fees, you are getting your vehicle repaired faster and for a fraction of the cost.
This module fits a wide range of General Motors vehicles beyond the Buick Verano, including the Chevy Malibu, Equinox, Impala, Cadillac SRX, GMC Acadia, and many more. Please review the detailed fitment list on this page to confirm compatibility with your specific vehicle.
Frequently Asked Questions
Do I need to have this ECM programmed?
No. The main benefit of our service is that we program the module for you before we ship it. Simply provide your vehicle’s VIN when you place your order, and it will arrive ready to be installed.
Is this a new part?
No, this is a genuine, used OEM part that has been carefully removed from a salvaged vehicle. Each unit is inspected and tested to ensure it is fully functional before being programmed and shipped.
How do I find my vehicle’s VIN?
Your 17-digit Vehicle Identification Number (VIN) can be found on your vehicle’s registration, insurance card, or on a small plate on the driver’s side of the dashboard, visible through the windshield.
Will this part fix my car’s problem?
This part will resolve any issues directly caused by a faulty ECM. However, it’s essential that your vehicle has been properly diagnosed. This module will not fix problems related to other faulty sensors, wiring, or mechanical components.
What is a ‘security relearn’ procedure?
After installation, your vehicle’s anti-theft system needs to recognize the new ECM. This is usually a simple procedure that involves turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’, and repeating a few times. Specific instructions for your vehicle can easily be found online or in a service manual.