2009 Sierra 1500 Pickup Engine Computer 12629009 | Programmed to Your VIN

End Your Truck’s Engine Troubles.

Get a reliable fix for your 2009 Sierra 1500 with this Engine Control Module. It comes fully programmed to your vehicle’s VIN with the latest GM software, eliminating the need for a costly dealership visit. This is the direct solution for clearing check engine lights, fixing no-start conditions, and restoring performance. Get your truck running right again—order today!

$139.95

+11.99 USPS Priority Shipping

Availability: In stock



SKU: 590-01527-58 Categories: ,
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Restore Peak Performance and Reliability to Your GM Truck

If you’re dealing with a frustrating check engine light, poor fuel economy, stalling, or a no-start condition in your 2009 Sierra 1500, a failing Engine Control Module (ECM) is a very likely culprit. As a technician with over two decades of experience under the hood, I’ve seen firsthand how a faulty ECM can cause a cascade of baffling issues. This isn’t just a component; it’s the brain of your engine, and when it falters, your truck’s performance and reliability suffer. We offer a direct, dependable solution: a replacement Engine Computer, part number 12629009, programmed specifically for your vehicle.

Forget the expensive trip to the dealership and the hassle of coordinating programming. We handle the critical step for you. Before we ship your part, we flash it with the latest official GM software updates using the VIN you provide. This ensures perfect compatibility and often resolves underlying software bugs that may have existed from the factory. This is the most effective way to restore your engine’s original efficiency, power, and smooth operation.

A Technician’s Notebook

I remember a 2009 Silverado 2500 with the 6.0L that came into my bay with a complaint of intermittent stalling at stoplights and a persistent P0601 (Internal Control Module Memory Check Sum Error) code. The owner had already replaced the throttle body and a few sensors with no luck. The problem was elusive because it wasn’t consistent. After checking the power and grounds to the ECM, we determined the module itself was failing internally. We installed a VIN-programmed unit just like this one. The truck fired right up, the code was gone for good, and the stalling issue was completely resolved. This simple swap saved the customer from further expensive guesswork.

Is Your Truck Showing These Symptoms?

A failing ECM can manifest in many ways. If you’re experiencing any of the following, this module is your solution:

  • âś” Persistent Check Engine Light (CEL)
  • âś” Diagnostic Trouble Codes (DTCs) such as P0601, P0602, P0606, or U0100
  • âś” Engine stalling or misfiring
  • âś” The vehicle won’t start at all
  • âś” Noticeable decrease in fuel economy
  • âś” Harsh or erratic transmission shifting
  • âś” Failure to pass an emissions inspection

A Straightforward Guide to Installation

Installing your new 2009 Sierra 1500 Engine Computer is a job most DIYers can handle with basic tools. Our pre-programming service eliminates the most difficult step.

  1. Safety First: Disconnect the negative terminal from your truck’s battery to prevent any electrical shorts.
  2. Locate the ECM: On most GM trucks like the Sierra, the ECM is found in the engine compartment, typically on the driver’s side near the fender or firewall.
  3. Disconnect the Old Module: Carefully unplug the electrical wiring harnesses connected to the ECM. There are usually release tabs you’ll need to press or lift.
  4. Remove the Old ECM: Unbolt the old module from its mounting bracket. Keep the hardware as you may need it for the new installation.
  5. Install the New ECM: Mount your new, pre-programmed module in the same location and secure it with the bolts.
  6. Reconnect Everything: Firmly plug the wiring harnesses back into the new ECM until they click into place. Reconnect the negative battery terminal.
  7. Final Steps: In some cases, a security relearn procedure may be required. This can often be done without special tools by cycling the key in the ignition. Consult your vehicle’s service information for specific steps if needed.

Verified Vehicle Compatibility

This ECM is a direct-fit replacement for a wide range of General Motors vehicles. It is compatible with part numbers 12629009 and 12625455. Please verify your vehicle is on the list below. If you have any questions, we’re here to help.

EXPRESS/SAVANA VANS (2009): 4.8L, 5.3L, 6.0L
SILVERADO/SIERRA 1500 (2009): w/o hybrid, w/o 4.3L
SILVERADO/SIERRA 2500/3500 (2009-2010): 6.0L
TAHOE/YUKON/SUBURBAN/AVALANCHE (2009-2010): w/o hybrid
ESCALADE/ESV/EXT (2009-2010): 6.2L
HUMMER H2 (2009)
CORVETTE (2009): Base model
PONTIAC G6 (2009): 3.5L, 3.9L
PONTIAC G8 (2009)
CHEVROLET IMPALA (2009): 3.5L, 3.9L
CHEVROLET MALIBU (2009): 3.5L
SATURN VUE (2010): 3.5L
Note: Some 2010 models require matching the ID number (12629009 or 12625455). Please check your original part.

Frequently Asked Questions

How do I provide my VIN for programming?

After you complete your purchase, simply send us a message with your vehicle’s 17-digit Vehicle Identification Number (VIN). We cannot ship the part until we have this information to perform the programming service.

Do I need to do anything else after installing this ECM?

Our programming handles the main engine and transmission software. However, some vehicles may require a security relearn procedure (often called a Passlock or Passkey relearn) to sync the new ECM with your vehicle’s anti-theft system. This can typically be done at home by cycling the ignition key and does not require a scan tool.

Is this a brand new part?

This is a high-quality, tested, and verified used OEM part that has been professionally prepared and programmed with the latest software for your vehicle, ensuring it meets or exceeds original factory specifications for performance and reliability.

My original part number is 12625455. Will this work?

Yes. This module, part number 12629009, is a fully compatible and interchangeable replacement for part number 12625455. We will program it to function perfectly in your vehicle.

What if my vehicle isn’t on the fitment list?

Please do not order if your vehicle is not on the compatibility list. The programming and internal hardware are specific to these applications. Contact us with your vehicle information, and we can help you find the correct part.

Brand

GM

Condition

Refurbished

Year

2009

MPN

12629009

Model

Sierra 1500 Pickup

Hardware Type

Genuine OEM

Yes

Interchange part number

PartNumber

590

Manufacturer Part Number

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