Programmed 2012 Impala Engine Control Module ECM 12650256

End Your Impala’s Running Issues

Get your vehicle running smoothly again with this pre-programmed Engine Control Module. It’s the direct-fit solution for a persistent check engine light, poor fuel economy, and stalling in your 2012 Impala and other GM models. We flash it with your car’s VIN for a simple, no-hassle installation that skips the expensive trip to the dealer. Order today for a reliable, plug-in fix!

$187.99

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SKU: 590-01910-56 Categories: ,
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Restore Peak Performance to Your GM Vehicle

As a technician with over two decades of experience under the hood, I’ve seen firsthand the frustration a failing Engine Control Module (ECM) can cause. Your 2012 Chevrolet Impala, or one of the many other compatible GM vehicles, might be experiencing baffling issues: a persistent check engine light, rough idling, sudden stalls, or alarmingly poor fuel mileage. These aren’t just annoyances; they’re signs that the very ‘brain’ of your engine is struggling. The ECM is responsible for managing everything from fuel injection and ignition timing to transmission shifts and emissions control. When it falters, the entire vehicle suffers.

This isn’t just a replacement part; it’s a comprehensive solution. We take the guesswork and dealer-level expense out of the equation. This module, part number 12650256, arrives at your door pre-programmed with the latest official GM software updates, specifically tailored to your vehicle’s unique Vehicle Identification Number (VIN). This critical step ensures seamless communication between the new ECM and all other systems in your car, restoring the precise performance and efficiency you’ve been missing.

Case Study: The Ghost in the Impala

A customer brought in a 2012 Impala with a list of complaints that sounded like a ghost was in the machine. The transmission would shift hard intermittently, the engine would stumble at idle, and a U0100 ‘Lost Communication with ECM/PCM’ code would pop up, only to disappear later. We checked wiring harnesses and connectors for hours, finding nothing. On a hunch, based on seeing this pattern before, we swapped in a known-good, programmed ECM. Every single problem vanished instantly. The original ECM’s internal processor was failing under load, causing it to briefly drop communication. This pre-programmed module is the exact fix for that kind of hard-to-diagnose issue.

Is Your Vehicle Showing These Signs of ECM Failure?

A faulty ECM can manifest in numerous ways. If you’re experiencing any of the following, this module is likely the solution you need. Look out for:

  • ✔ Check Engine Light (CEL) is on or flashing
  • ✔ Stored diagnostic trouble codes (DTCs) like P0601 (Internal Control Module Memory Check Sum Error), P0606 (ECM/PCM Processor Fault), or U0100 (Lost Communication)
  • ✔ Engine stalling, stumbling, or hesitating during acceleration
  • ✔ Noticeable decrease in fuel economy
  • ✔ Harsh or erratic automatic transmission shifting
  • ✔ Complete no-start condition where the engine cranks but won’t fire
  • ✔ Misfire codes that persist even after replacing plugs and coils

A Straightforward Guide to Your ECM Installation

Replacing the 2012 Impala Engine Control Module is a job most DIY enthusiasts can handle. For the 2012 Impala, it’s conveniently located on the air cleaner bracket. Always consult a repair manual for your specific vehicle’s location.

  1. Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
  2. Locate the ECM: On the 2012 Impala, it’s mounted to the air cleaner assembly. On other models, it’s typically in the engine bay on the driver’s or passenger’s side.
  3. Disconnect Connectors: Carefully unlatch and remove the electrical wiring harness connectors. Inspect them for any corrosion or damage.
  4. Remove the Old Module: Unbolt the old ECM from its mounting bracket and remove it from the vehicle.
  5. Install the New Module: Mount your new, pre-programmed ECM in place and securely tighten the bolts.
  6. Reconnect Everything: Firmly re-seat the electrical connectors until they click into place. Reconnect the negative battery terminal.
  7. Perform Security Relearn (If Necessary): Many GM vehicles require a simple security relearn procedure to allow the vehicle to start. This usually involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times. Your vehicle’s manual will have the specific steps.

Verified Vehicle Compatibility List

This ECM is a direct-fit replacement for a wide range of GM vehicles and supersedes multiple part numbers, ensuring you get the right component. Please verify your vehicle is on this list. This module replaces part numbers: 12616889, 12630908, 12637106, 12642665, 12650256, and 12651993.

ALLURE: 2010 (2.4L, 3.0L)
CAMARO: 2012 (3.6L)
CAPTIVA SPORT: 2012
CTS: 2010-2012 (3.0L), 2012 (3.6L)
EQUINOX: 2010-2011
IMPALA: 2012
LACROSSE: 2010-2011 (2.4L, 3.0L)
ORLANDO: 2012-2013
REGAL: 2011
SAAB 9-5: 2010-2011 (2.0L)
SRX: 2010-2011 (3.0L)
TERRAIN: 2010-2011

Frequently Asked Questions

Frequently Asked Questions

Why do you need my VIN?

Your Vehicle Identification Number (VIN) is essential. We use it to load the exact, correct GM-certified software for your vehicle’s specific options and systems. This ensures perfect compatibility and function right out of the box.

Is this part difficult to install for a DIYer?

For most models, this is a straightforward replacement. It involves disconnecting the battery, unplugging the old module, unbolting it, and installing the new one. The most common extra step is a simple security relearn procedure that requires no special tools.

Will this fix my check engine light?

If the check engine light is caused by an internal failure of the ECM (like codes P0601 or P0606), then yes, this will resolve the issue. It’s crucial to properly diagnose the problem first, as the light can be triggered by many other components.

What is a ‘security relearn procedure’?

It’s a simple process that syncs your new ECM with the vehicle’s anti-theft system. It typically involves a sequence of key turns and waiting periods, and the instructions can be easily found online or in your owner’s manual.

My original part has a different number. Will this still work?

Yes. This module, 12650256, is the updated replacement for several older part numbers, including 12616889, 12630908, and others listed. As long as your vehicle is on the compatibility list, this is the correct part for you.

Condition

Refurbished

Year
Genuine OEM

Yes

MPN

12650256

Interchange part number

PartNumber

590

Model

IMPALA

Year

2012

Brand

GM

Manufacturer Part Number

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