Restore Peak Performance to Your Vehicle’s Engine
Is your Chevrolet Impala or other GM vehicle running rough, stalling unexpectedly, or showing a persistent Check Engine Light? These are classic signs that the engine’s central computer is failing. As a technician with over two decades of experience under the hood, I’ve seen firsthand how a faulty Engine Control Module (ECM) can wreak havoc on a vehicle’s performance, fuel economy, and reliability. This isn’t just a part; it’s the brain of your engine, and when it’s not working correctly, nothing else will. This replacement ECM, part number 12616889, is the definitive solution to get your car running like new again.
The biggest hurdle for most DIYers and even professional shops when replacing an ECM is the programming. A new module from the dealership requires expensive, specialized tools to link it to your vehicle’s specific Vehicle Identification Number (VIN) and security systems. We eliminate that entire frustrating and costly step. Before we ship this module, we flash it with the latest GM-certified software, precisely matched to your car’s VIN. It arrives at your door ready for a straightforward installation, saving you hundreds of dollars and significant downtime.
Case Study: A Tricky Diagnosis
I remember a 2012 Impala that came into my bay with a complaint of intermittent stalling at stoplights and a random P0601 (Internal Control Module Memory Check Sum Error) code that would come and go. The owner had already replaced the spark plugs and an O2 sensor with no luck. We checked the wiring and grounds—everything looked perfect. The intermittent nature of the problem pointed directly to the ECM’s internal processor failing under certain conditions. We installed one of our pre-programmed modules, and the customer called back a week later, thrilled that the stalling was completely gone and the car felt more responsive than it had in years. This is a common story, and a new, properly programmed ECM is often the simple, effective fix.
Is Your Vehicle Showing These Telltale ECM Failure Symptoms?
A failing ECM can manifest in numerous ways. If you’re experiencing any of the following, it’s highly likely your engine computer is the culprit. Don’t let these issues get worse and potentially cause damage to other components.
- âś” Check Engine Light is illuminated with codes like P0601, P0606, or U0100.
- âś” The engine cranks but refuses to start.
- âś” Unexplained drops in fuel efficiency (MPG).
- âś” Engine stalling, stuttering, or hesitating during acceleration.
- âś” Rough or erratic idling.
- âś” Automatic transmission shifting problems or harsh shifts.
- âś” Loss of communication with other vehicle modules.
A Straightforward Guide to Your ECM Installation
Replacing the 2012 Impala Engine Control Module is a job most home mechanics can handle. Because we pre-program the unit, you won’t need any special scan tools for the core installation. Just follow these steps carefully.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent any accidental reconnection.
- Locate the ECM: On the 2012 Impala, the ECM is conveniently located on the air cleaner bracket in the engine compartment. On other models, it’s typically on the driver’s side of the engine bay.
- Disconnect the Connectors: Carefully release the locking tabs on the electrical wiring harnesses and pull them straight out from the old ECM. Inspect the connectors for any corrosion or damage.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket. Keep the mounting hardware as you will reuse it.
- Install the New Module: Mount your new, pre-programmed ECM onto the bracket and securely plug in the wiring harnesses. You should hear a click as they lock into place.
- Final Steps: Reconnect the negative battery terminal. You may need to perform a simple security relearn procedure, which typically involves turning the key to the ‘ON’ position for 10-15 minutes. Consult your owner’s manual for the specific procedure for your vehicle. Start the engine and enjoy a smoother, more reliable ride!
Verified Vehicle Compatibility
This module is a direct replacement for multiple part numbers, ensuring a perfect fit for a wide range of GM vehicles. Please match your vehicle, year, and engine to the list below. This unit replaces part numbers: 12616889, 12630908, 12637106, 12642665, 12650256, and 12651993.
ALLURE 10 (LH engine compartment) 2.4L or 3.0L
CAMARO 12 (3.6L) w/ IDs 12637106, 12642665, 12650256
CAPTIVA SPORT 12 (LH engine compartment) w/ IDs 12616889, 12630908, 12637106, 12642665, 12650256
CTS 10-12 (3.0L) & CTS 12 (3.6L) w/ IDs 12616889, 12630908, 12637106, 12642665, 12650256
EQUINOX 10-11 (LH engine compartment)
LACROSSE 10 (3.0L) & 10-11 (2.4L)
ORLANDO 12-13 (LH engine compartment) w/ IDs 12616889, 12630908, 12637106, 12642665, 12650256, 12651993
REGAL 11 (LH engine compartment)
SAAB 9-5 10-11 (2.0L) w/ ID 12642665
SRX 10-11 (LH engine compartment) 3.0L
TERRAIN 10-11 (LH engine compartment)
Frequently Asked Questions
Frequently Asked Questions
Do I need to do any programming or flashing myself?
No. We handle all the programming before shipping. We use your VIN to load the correct, updated software so the module is ready to install when you receive it.
How do I provide my VIN number?
After you complete your purchase, simply send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot ship your order until we receive this information.
Is this a used or repaired part?
This is a high-quality, tested replacement part, guaranteed to restore your vehicle’s function. It is programmed with fresh, factory-specified software for optimal performance.
Will this fix my transmission shifting issues?
In many modern vehicles, the ECM also controls transmission functions. If your shifting problems are caused by faulty signals from the engine computer, this replacement 2012 Impala Engine Control Module will resolve them.
What if I order the wrong part?
Our extensive fitment list is designed to prevent errors. Please double-check your vehicle’s make, model, year, and original part number. If you are unsure, contact us with your VIN before ordering, and we will verify compatibility for you.