Is your 2006 Chevrolet Impala acting up? Dealing with a persistent Check Engine Light, sudden stalling, or rough idling can be incredibly frustrating. As a technician with over two decades of experience under the hood, I’ve seen these exact issues countless times. More often than not, the culprit is a failing Engine Control Module (ECM)—the electronic brain of your vehicle.
When the ECM starts to fail, it can cause a cascade of confusing problems, from poor fuel economy and erratic transmission shifting to a complete no-start condition. Don’t let a faulty computer keep your reliable Impala off the road. This isn’t just a replacement part; it’s a direct solution, pre-programmed with the latest GM software specifically for your vehicle’s VIN. This critical step ensures all systems, from the engine and transmission to the fuel injectors, work together in perfect harmony, just as the factory intended.
A Technician’s Notebook: The Intermittent Stall
A customer brought in a 2006 Impala 3.5L with a problem that had stumped two other shops: it would randomly stall at stoplights, but only after it was fully warmed up. There were no consistent trouble codes, just a history of random communication faults. We checked fuel pressure, sensors, and wiring—all perfect. From experience, I know that the ECM in these models, tucked under the air cleaner box, is susceptible to heat-related failures. After a 30-minute test drive to get everything hot, we tapped on the ECM, and the engine sputtered immediately. A new, properly programmed module like this one solved the problem for good. It’s a classic case where the component itself is the hidden cause of a maddening issue.
Is Your Vehicle Showing These Symptoms?
A failing ECM can manifest in various ways. If you’re experiencing any of the following, it’s a strong indicator that your vehicle’s computer needs attention:
- ✔ Check Engine Light is illuminated with codes like P0601 (Internal Control Module Memory Check Sum Error) or P0606 (ECM/PCM Processor Fault).
- ✔ The engine cranks but refuses to start.
- ✔ Unexplained drops in fuel efficiency.
- ✔ The vehicle stalls unexpectedly while driving or idling.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Noticeable loss of engine power and poor acceleration.
- ✔ Communication errors with other vehicle modules (U-codes).
A Straightforward Guide to Installation
One of the biggest benefits of this module is its simple, plug-and-play installation. Because we handle the programming, you can avoid a costly trip to the dealership. Here’s a general guide for the 2006 Impala:
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the ECM: On the 2006 Impala, the Engine Control Module is typically found in the lower part of the air cleaner box assembly in the engine bay.
- Remove the Old Module: Carefully unplug the wiring harness connectors. They have locking tabs that need to be released. Then, unbolt the module from its mounting bracket.
- Install the New Module: Seat the new, pre-programmed ECM in the mounting bracket and secure it. Reconnect the wiring harnesses, making sure they click securely into place.
- Final Step: Reconnect the negative battery terminal. The vehicle may need to complete an idle-relearn procedure, which typically involves starting it and letting it idle for a few minutes.
Verified Vehicle Compatibility
This ECM is a direct fit for a wide range of General Motors vehicles. It is interchangeable with service numbers 12590032, 12602044, 12603530, 12605843, 12607096, 19210737, and 12630457. Please verify your vehicle from the list below to ensure a perfect match.
IMPALA 06 Electronic Control Module; (lower part of air cleaner box), 3.9L
IMPALA 08-09 Electronic Control Module; (lower part of air cleaner box), 5.3L
ACADIA 07-08 Electronic Control Module; (behind fan shroud), ID 12607096
ALLURE 08-09 Electronic Control Module; (lower air cleaner housing), 5.3L
AURA 08-09 Electronic Control Module; (RH firewall), 2.4L, w/hybrid
CANYON 08 Electronic Control Module; (RH firewall)
COBALT 06 Electronic Control Module; (LH front engine compartment), 2.4L
… and many more GM, Isuzu, and Saab models. See full list for details.
Frequently Asked Questions
What does ‘VIN Programmed’ mean?
It means we flash the module with the specific software and calibration file for your exact vehicle using your Vehicle Identification Number (VIN). This ensures it works correctly out of the box without requiring expensive dealer tools for setup.
Do I need to do anything after installing this ECM?
In most cases, no further action is needed. The programming we perform covers the essential setup. Some vehicles may require a security relearn or crankshaft position sensor relearn, which can often be done without special tools. Instructions can be provided upon request.
How do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot ship the module until we have this information to perform the programming service.
Is this part compatible with other service numbers?
Yes, this ECM, part number 12630457, is a direct replacement for several other service numbers, including 12590032, 12602044, 12603530, 12605843, 12607096, and 19210737. If your old module has one of these numbers, this part will work for you.