Is your 2008 or 2009 Chevrolet Impala suffering from frustrating issues like a persistent check engine light, poor fuel economy, stalling, or a no-start condition? These are classic signs of a failing Engine Control Module (ECM), the central computer that manages your vehicle’s engine performance, emissions, and efficiency. A faulty ECM can make your reliable Impala feel unpredictable and unsafe. This replacement Engine Control Module, part number 19210737, is the definitive solution to restore your vehicle’s factory performance and dependability.
From the Diagnostic Bay
We recently had a 2008 Impala 5.3L towed to the shop. The owner had spent weeks chasing a random stalling issue. The car would run fine for days, then suddenly die at a stoplight and refuse to restart for an hour. No consistent trouble codes were stored, making diagnosis a nightmare for other shops. After hooking up our professional scan tool and monitoring live data, we noticed the 5-volt reference signal would intermittently drop out just before a stall. This is a tell-tale sign of an internal ECM failure. We installed one of our VIN-programmed modules, performed the security relearn, and the car ran flawlessly. The owner was thrilled to have his car back without the constant worry of getting stranded.
Diagnosing Your 2008-2009 Impala ECM
The ECM is the brain of your engine. When it begins to fail, it can cause a wide array of confusing symptoms. Replacing the correct part the first time is crucial to avoiding wasted time and money on unnecessary repairs. This module is the key to solving those electrical gremlins that have been plaguing your vehicle.
Common Symptoms of a Failing ECM
- ✔ Persistent Check Engine Light (CEL) with codes related to processor faults (e.g., P0601, P0606) or sensor circuits.
- ✔ Unexplained engine stalling or hesitation during acceleration.
- ✔ Noticeable decrease in fuel mileage.
- ✔ Engine misfires or rough idling even after replacing spark plugs and coils.
- ✔ Intermittent no-start or hard-starting conditions.
- ✔ Automatic transmission shifting erratically or harshly.
- ✔ Inability for scan tools to communicate with the module.
This unit is a direct replacement for multiple GM service numbers, including 12590032, 12602044, 12603530, 12605843, 12607096, 12630457, and 19210737. We simplify the repair process by programming the module to your car’s specific Vehicle Identification Number (VIN) before it ships. This ensures full compatibility with your vehicle’s factory options and security systems, eliminating the need for an expensive trip to the dealership for software flashing. Simply install the module, perform the straightforward security relearn procedure, and get back on the road with confidence.
Frequently Asked Questions
Do I need to get this ECM programmed by a dealer?
No. We handle the programming for you before we ship the part. Simply provide us with your 17-digit VIN during or after checkout, and we will flash the module with the latest GM-certified software for your specific vehicle.
Where is the ECM located on a 2008-2009 Chevy Impala?
On most 2008-2009 Impala models, the Engine Control Module is located in the engine bay, situated within the lower part of the air cleaner box assembly for protection.
What is a security relearn procedure?
After installation, your vehicle’s anti-theft system needs to recognize the new ECM. This is typically a simple procedure that involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times. Instructions are readily available online for your specific model.
Is this compatible with other GM vehicles?
Yes, this ECM is compatible with a wide range of GM vehicles from roughly 2005 to 2010. Please use the detailed fitment list on this page to confirm it is the correct part for your specific make, model, and engine option.
What information do you need from me?
All we need is your vehicle’s 17-digit VIN. You can find this on your driver’s side dashboard (visible through the windshield), on your door jamb sticker, or on your vehicle’s registration and insurance documents.