Restore Peak Performance to Your GM Vehicle
Is your 2006 Impala suffering from frustrating issues like a persistent check engine light, erratic stalling, or a complete no-start condition? These are classic signs of a failing Engine Control Module (ECM), the central computer responsible for managing your vehicle’s engine performance, fuel economy, and emissions. A faulty ECM can make your car unreliable and unsafe. This replacement Engine Control Module, part number 19210737, is the definitive solution to get your vehicle running smoothly and dependably again.
As a technician with over two decades of experience, I’ve seen countless drivers spend a fortune chasing down sensor and wiring issues when the root cause was the ECM itself. This module is your direct path to a lasting repair. The best part? We handle the complex programming for you. Simply provide your vehicle’s VIN at checkout, and our specialists will flash the module with the latest GM-certified software specifically for your car. It arrives at your door ready for installation, saving you hundreds of dollars and the hassle of a dealership visit.
A Technician’s Notebook: The Phantom Stall
I remember a 2006 Chevy Impala that came into the shop with an intermittent stalling problem that was driving the owner crazy. Two other shops had already replaced the fuel pump and crankshaft position sensor, but the issue persisted. No hard codes were stored, just a history of U0100 (Lost Communication With ECM/PCM). After checking the main power and ground circuits to the ECM, I noticed a slight voltage drop when wiggling the main harness. On these models, the ECM is located under the air filter box, where it’s susceptible to heat and vibration. A failing internal processor was causing it to periodically shut down. We installed one of these VIN-programmed modules, performed the security relearn, and the car ran perfectly. It’s a textbook example of how a failing computer can mimic other component failures.
Common Signs of a Failing ECM
- âś” Check Engine Light is illuminated with communication or internal processor codes (e.g., P0601, P0606, U0100).
- âś” Vehicle refuses to start or cranks but won’t turn over.
- âś” Unexplained drops in fuel efficiency.
- âś” Engine stalling or hesitating, especially when warm.
- âś” Rough idling or misfiring.
- âś” Transmission shifting problems or failure to engage gears.
- âś” Inability to communicate with the module using a scan tool.
DIY-Friendly Installation Guide
- âś” Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- âś” Locate the ECM: On the 2006 Impala, the ECM is typically found underneath the air cleaner assembly. You will need to remove the airbox to access it.
- âś” Disconnect Connectors: Carefully unlatch and disconnect the wiring harness connectors from the old ECM. Inspect them for any corrosion or damage.
- âś” Remove the Old Module: Unbolt the old ECM from its mounting bracket.
- âś” Install the New Module: Mount your new, pre-programmed ECM in place and securely fasten it.
- âś” Reconnect Everything: Plug the wiring harness connectors firmly into the new module until they click. Reinstall the air cleaner assembly and reconnect the negative battery terminal.
- âś” Perform Security Relearn: You MUST perform a security relearn procedure (often called a Passlock or Passkey relearn) for the vehicle to recognize the new ECM. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’, and repeating two more times. Your vehicle will not start until this is completed.
Verified Vehicle Compatibility
This module is a direct replacement for a wide range of General Motors vehicles and interchanges with several part numbers, including 12590032, 12602044, 12603530, 12605843, 12607096, and 12630457. While it is a perfect fit for the 2006 Impala Engine Control Module, it also fits dozens of other models. Please review the detailed fitment list to confirm this part is the correct one for your specific vehicle, engine, and options.
Frequently Asked Questions
Do I need to program this ECM?
No. We pre-program the module to your car’s specific VIN before shipping. It arrives ready for installation and a security relearn procedure.
What is the difference between an ECM and a PCM?
The terms are often used interchangeably. ECM (Engine Control Module) specifically manages the engine. A PCM (Powertrain Control Module) manages both the engine and the transmission. For most modern vehicles, including those this part fits, it’s a PCM that handles both functions.
Where is the ECM on a 2006 Chevy Impala?
It is located in the engine bay, situated directly beneath the air cleaner box assembly.
What happens if I don’t do the security relearn?
The vehicle’s anti-theft system will not recognize the new ECM, and the engine will be disabled. It will crank but will not start until the relearn procedure is successfully completed.
Is this part guaranteed to fit my vehicle?
Yes, as long as your vehicle is on the compatibility list and you provide the correct VIN for programming. This module is a direct replacement for multiple GM service numbers, ensuring broad compatibility.