Is your 2006 Chevrolet Impala giving you headaches with a persistent check engine light, rough idling, or a frustrating no-start condition? As a technician with over two decades of experience, I’ve seen firsthand how a failing Engine Control Module (ECM) can cause a host of mysterious and hard-to-diagnose problems. The ECM is the brain of your vehicle’s engine, and when it starts to fail, it can disrupt everything from fuel economy to transmission shifting. This isn’t just an inconvenience; it’s a critical component for your car’s performance and reliability.
This listing is for a dependable, fully tested Engine Control Module, part number 12590032. We take the guesswork and high dealership costs out of the equation. Simply provide us with your vehicle’s VIN (Vehicle Identification Number) after purchase, and we will program the module with the latest official GM software updates specific to your car. This ensures seamless communication with your vehicle’s other systems and restores original factory performance. When you receive this part, it’s ready for a straightforward installation, getting you back on the road with confidence.
Case Study: A Tricky Diagnosis
I remember a 2006 Impala 3.5L that came into my bay a few years back. The owner was at his wit’s end. He’d been to two other shops for an intermittent stalling issue that never set a consistent trouble code. Sometimes it would run fine for weeks, then die at a stoplight without warning. We checked fuel pressure, sensors, and wiring—everything seemed perfect. On a hunch, I monitored the 5-volt reference signal from the ECM to the throttle position sensor. During a long test drive, I saw the voltage flicker and drop erratically just before it stalled. The internal voltage regulator in the original ECM was failing under thermal stress. Swapping in a quality, correctly programmed 2006 Impala Engine Control Module solved the problem for good. It’s often the component you least suspect that’s causing the most trouble.
Common Signs of a Failing ECM
- ✔ Check Engine Light is illuminated with communication or internal processor codes (e.g., P0601, P0606, U0100).
- ✔ Engine cranks but refuses to start.
- ✔ Noticeable drop in fuel efficiency for no apparent reason.
- ✔ Rough or unpredictable automatic transmission shifting.
- ✔ The engine stalls, stumbles, or misfires intermittently.
- ✔ Failure to pass state emissions testing.
A Straightforward Guide to Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- ✔ Locate the ECM: On the 2006 Impala, the ECM is conveniently located in the lower part of the air cleaner box assembly. You will need to remove the air filter cover and filter to access it.
- ✔ Disconnect Connectors: Carefully unplug the wiring harness connectors from the old module. There are typically release tabs that need to be pressed or lifted. Do not force them.
- ✔ Remove the Old Module: Unbolt the old ECM from its mounting bracket.
- ✔ Install the New Module: Secure your new, pre-programmed ECM in place and securely reconnect the wiring harnesses. You should hear a click as they lock in.
- ✔ Final Steps: Reinstall the air filter and cover. Reconnect the negative battery terminal. The vehicle may require a security relearn procedure, which can often be done by cycling the key.
Verified Vehicle Compatibility
This 2006 Impala Engine Control Module is a direct replacement for service number 12590032 and is also interchangeable with 12602044, 12603530, 12605843, 12607096, 12630457, and 19210737. It fits a wide range of GM, Isuzu, and Saab vehicles. Please verify your specific model and engine in the list below or contact us with your VIN for guaranteed fitment.
IMPALA 06 Electronic Control Module; (lower part of air cleaner box), 3.9L
MONTE CARLO 06 Electronic Control Module; (lower part of air cleaner box), 3.5L
DTS 06 Electronic Control Module
DEVILLE 05 Electronic Control Module; (LH engine compartment), ID 12590032
COBALT 06 Electronic Control Module; (LH front engine compartment), 2.4L
… and many more models. See full list provided in original data.
Frequently Asked Questions
Frequently Asked Questions
Do I need to do any programming myself?
No. This module comes fully programmed to your vehicle’s specific VIN with the latest GM software. It is ready for installation right out of the box.
What information do you need from me?
After you complete your purchase, we will need the 17-digit Vehicle Identification Number (VIN) from your vehicle. This is usually found on the driver’s side dashboard or door jamb sticker.
Is this a simple DIY job?
For most individuals with basic mechanical skills, this is a very manageable job. On the 2006 Impala, it’s located under the air filter housing and requires only common hand tools. Following our installation guide should make the process smooth.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the 2006 Impala Engine Control Module (such as codes P0601-P0606), then this part is the correct solution. It’s always best to have the codes read to confirm the diagnosis.
Is there a core charge?
This listing does not require a core return, saving you the time and expense of shipping your old part back.