Restore Your Impala’s Performance and Reliability
Is your Chevrolet Impala suffering from a persistent check engine light, erratic shifting, or a frustrating no-start condition? These are classic signs that the brain of your vehicle, the Powertrain Control Module (PCM), is failing. Don’t let a faulty computer keep you off the road or lead to more expensive repairs down the line. This direct-fit PCM, service number 12597125, is the definitive solution to restore your car’s health and your peace of mind.
We take the guesswork and dealership hassle out of the equation. Unlike a generic module from a parts store, this unit arrives at your door fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). We load it with the latest, most stable software updates directly from GM, ensuring optimal performance, fuel economy, and emissions control. It’s a true plug-and-play solution designed to get you back behind the wheel with confidence.
Warning Signs and How to Overcome Them
A failing PCM can manifest in numerous ways. If you’re experiencing any of the following, this module is your solution:
- ✔ Persistent Check Engine Light (CEL) with codes like P0601, P0602, P0606, or other communication errors.
- ✔ Unexplained drop in fuel mileage.
- ✔ Engine stalling, stumbling, or running rough at idle.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Complete no-start or intermittent starting issues.
- ✔ Failed emissions testing.
- ✔ This pre-programmed 2010-2011 Impala PCM resolves these issues by restoring the core logic of your engine and transmission.
Guided Installation to Restore Peace of Mind
Installing your new 2010-2011 Impala PCM is a straightforward process that a confident DIYer can handle. Follow these steps for a successful replacement:
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait at least 15 minutes to allow all systems to discharge.
- Locate the Module: On the 2010-2011 Impala, the PCM is located within the lower part of the air cleaner box assembly. You will need to remove the air filter cover to access it.
- Disconnect Wiring: Carefully unplug the electrical connectors from the old PCM. Use a small flathead screwdriver to gently release the locking tabs if necessary. Never pull on the wires themselves.
- Remove the Old Unit: Unbolt the old PCM from its mounting bracket within the airbox. Note the orientation of the module.
- Install the New PCM: Mount your new, pre-programmed PCM in the same location and orientation. Secure the bolts.
- Reconnect and Secure: Firmly plug the wiring harnesses into the new module until they click into place. Reassemble the air cleaner box.
- Final Steps: Reconnect the negative battery terminal. The final crucial step is to perform the vehicle’s security relearn procedure (often called the Passlock or anti-theft relearn). This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’, and repeating this cycle three times. This allows the new PCM to synchronize with your vehicle’s anti-theft system.
Tailored Fit for Your Ride
This module is the specified replacement for the 2010-2011 Chevrolet Impala. However, its versatile E39 architecture allows it to be a direct, pre-programmed replacement for a wide range of other GM vehicles and service numbers. Please verify your part number or vehicle in the list below.
Compatible Service Numbers: 12612397, 126140, 12594750, 12597125, 12629019, 12635902, 12611549
Partial Fitment List:
- Aura (2008-2009)
- Cobalt (2007-2010)
- Express 1500 Van (2008-2009)
- G5 / G6 (2007-2010)
- HHR (2007-2011)
- Lucerne (2009-2011)
- Malibu (2007-2012)
- Silverado/Sierra 1500 (2007-2009, 4.3L)
- Sky / Solstice (2008-2010)
- Vue (2008-2010)
Frequently Asked Questions
Do I need to get this PCM programmed by a dealer?
No. The main benefit of our service is that this module arrives pre-programmed to your car’s exact VIN with the latest GM software. This saves you the time, cost, and hassle of a dealership visit. It is ready for installation right out of the box.
What is the security relearn procedure?
The security relearn, or anti-theft relearn, is a simple process that synchronizes the new PCM with your vehicle’s existing keys and security system. It usually involves a sequence of key turns and waiting periods. We include general instructions, and specific procedures for your model are widely available online.
Where is the PCM located on my 2010-2011 Impala?
The PCM is housed inside the lower portion of the engine’s air filter box assembly. You’ll need to open the airbox to access and replace it.
How do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit VIN. You can typically add it as a note during checkout or send it to us in a message referencing your order number. We cannot program and ship the module without it.
Is this compatible with other part numbers?
Yes, this PCM (12597125) is a direct replacement for several other GM service numbers, including 12612397, 12594750, 12629019, and more as listed in the description. It’s the correct hardware for a wide range of vehicles.