If your 2006 Chevrolet Impala is suffering from frustrating issues like a persistent check engine light, erratic engine behavior, or even a no-start condition, the root cause is often a failing Engine Control Module (ECM). As an automotive technician with over two decades of experience, I’ve seen firsthand how a faulty ECM can create a cascade of problems that are difficult to diagnose. This isn’t just another part; it’s the central command center for your vehicle’s engine, and when it fails, performance, reliability, and fuel economy suffer.
This replacement ECM, part number 12607096, is the definitive solution. We take the guesswork and high cost out of the repair by programming the module specifically for your vehicle using your VIN. This means it arrives at your door with the latest GM software updates, ready for a straightforward installation. You can bypass the expensive trip to the dealership for programming and get your Impala running smoothly again.
Case Study: A Tricky Diagnosis
I remember a 2006 Impala 3.5L that came into my bay 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 a couple of sensors with no luck. A scan showed a few random communication codes, including a U0100 (Lost Communication With ECM/PCM). After checking the wiring harness for damage—a common issue—we found everything intact. The culprit was the ECM itself. Internal circuit board failure was causing it to drop communication intermittently. Installing a VIN-programmed module like this one resolved all the issues in under an hour. It’s a classic example of how this single component can mimic a dozen other problems.
Is Your Impala Showing These Telltale Signs?
- ✔ Persistent Check Engine Light that won’t clear.
- ✔ Engine stalling, stuttering, or misfiring for no apparent reason.
- ✔ A noticeable drop in fuel economy.
- ✔ The vehicle won’t start, but the battery and starter are good.
- ✔ Harsh or incorrect automatic transmission shifting.
- ✔ Diagnostic Trouble Codes (DTCs) related to internal module failure (like P0601, P0606) or communication errors (U-codes).
- ✔ Failure to pass an emissions test.
A Straightforward Guide to Installation
Installing your pre-programmed 2006 Impala Engine Control Module is a manageable job for a confident DIYer. For the 2006 Impala, the ECM is conveniently located in the lower part of the air cleaner box assembly.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the ECM: Open the hood and find the air cleaner housing on the driver’s side of the engine bay. The ECM is situated in the bottom portion of this housing.
- Access the Module: You will likely need to unclip and remove the top of the air cleaner box and the air filter to gain clear access to the ECM.
- Disconnect Connectors: Carefully unlatch and remove the electrical wiring harness connectors from the old ECM. These connectors have locking tabs; do not force them. Note their orientation.
- Remove the Old ECM: Unbolt the old module from its mounting bracket within the air box.
- Install the New ECM: Mount your new, pre-programmed ECM in place of the old one. Reconnect the wiring harnesses, ensuring they click securely into place.
- Reassemble & Reconnect: Put the air filter and air cleaner housing back together. Reconnect the negative battery terminal.
- Final Step: Some vehicles may require a security relearn procedure, which can often be done without special tools. Instructions are readily available online or in your vehicle’s service manual. Start the car and check for proper operation.
Verified Compatibility Across GM Models
While this is a perfect fit for the 2006 Impala Engine Control Module, its versatile design (interchangeable with service numbers 12590032, 12602044, 12603530, 12605843, 12630457, and 19210737) allows it to be used in a wide array of GM vehicles. Please use the fitment chart below to confirm compatibility. Providing your VIN at checkout is the best way to guarantee a perfect match.
MONTE CARLO 06 Electronic Control Module; (lower part of air cleaner box), 3.5L or 3.9L
ALLURE 08-09 Electronic Control Module; 5.3L
LACROSSE 08-09 Electronic Control Module; 5.3L
GRAND PRIX 08 Electronic Control Module; 5.3L
TRAILBLAZER 07-09 (4.2L, 5.3L, 6.0L)
ENVOY 07-09 (4.2L, 5.3L)
CADILLAC DTS / DEVILLE / CTS / STS / SRX / XLR (Various Years, check ID)
BUICK ENCLAVE / LUCERNE / RAINIER (Various Years, check ID)
GMC ACADIA / CANYON / ENVOY (Various Years, check ID)
SATURN AURA / ION / OUTLOOK / VUE (Various Years, check ID)
HUMMER H3 08
…and many other models. Please verify your part number or contact us with your VIN.
Frequently Asked Questions
How does the VIN programming work?
After you complete your purchase, you will need to send us your vehicle’s 17-digit VIN (Vehicle Identification Number). Our technicians use this number to load the latest, most stable GM-approved software for your specific vehicle onto the module before we ship it. This ensures it communicates perfectly with the other systems in your car.
Is this a plug-and-play part?
Yes, for the vast majority of vehicles, it is. Because we program it to your VIN, it eliminates the need for dealer-level programming tools. In some cases, a simple ‘security relearn’ or ‘CASE relearn’ procedure may be needed after installation, which typically doesn’t require special tools.
Will this fix my check engine light?
If the check engine light is on due to an internal failure of the ECM (common codes P0601-P0606) or related communication errors, then yes, this part is the correct fix. However, it’s always best to have the codes professionally diagnosed to ensure the ECM is the true source of the problem and not a faulty sensor or wire.
What is the difference between an ECM and a PCM?
The terms are often used interchangeably. ECM stands for Engine Control Module, while PCM stands for Powertrain Control Module. A PCM controls both the engine and the transmission, while an ECM typically just controls the engine. On many modern GM vehicles like the Impala, this single unit functions as the PCM, managing both systems.