Programmed 12704475 ECM | GM Engine Computer | VIN Flashed

The Simple Fix for a Complex Problem.

Don’t let a faulty engine computer keep you sidelined. This ECM (part #12704475) comes fully programmed with the latest GM software for your exact VIN, giving you confidence and peace of mind. It’s the dealership-level solution without the dealership price tag. This unit is backed by our one-year replacement warranty. Get your vehicle running right again!

$279.95

+11.99 USPS Priority Shipping

Availability: In stock



SKU: 590-10246-17 Categories: ,
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Restore Your Vehicle’s Brain, Restore Your Confidence

Is your truck, van, or SUV suddenly running rough, refusing to start, or flashing a persistent Check Engine Light? A failing Engine Control Module (ECM) can feel like a complex, show-stopping problem, leaving your vehicle unreliable and sidelining your daily life or business operations. This genuine GM Engine Control Module, part number 12704475, is the definitive, hassle-free solution. We professionally program it to your vehicle’s specific VIN before it ships, ensuring it’s ready for installation right out of the box. Get your vehicle back on the road with the reliability and performance you expect.

Common Symptoms & Your Solution

A faulty ECM can manifest in numerous ways, often causing confusion and costly misdiagnoses. If you’re experiencing any of the following, this pre-programmed module is your answer:

  • No-Start Condition: The engine cranks but refuses to start due to a lack of fuel or spark commands.
  • Check Engine Light (CEL): Persistent CEL with communication-related Diagnostic Trouble Codes (DTCs) like U0100 (Lost Communication With ECM/PCM).
  • Poor Performance: Issues like rough idling, stalling, poor fuel economy, and erratic transmission shifting.
  • Intermittent Problems: Symptoms that appear randomly and are difficult to replicate, often worsening as the vehicle warms up.

By replacing your old unit with this professionally flashed Programmed 12704475 ECM, you are directly addressing the root cause of these critical electronic failures.

Features & Benefits

  • ✔ VIN-Programmed for You: We flash the module with the latest GM software using your vehicle’s VIN. This critical step ensures perfect communication between the ECM and all other vehicle systems, saving you a trip to the dealership.
  • ✔ Plug-and-Play Solution: Arrives ready for installation. Once the straightforward vehicle theft deterrent relearn is completed, your vehicle will be back to factory-spec operation.
  • ✔ OEM Quality & Reliability: As a direct replacement for multiple GM part numbers, this module guarantees a perfect fit and dependable, long-term performance for your vehicle.
  • ✔ Cost-Effective Repair: Avoid the high costs and scheduling headaches associated with dealership programming. This is the professional-grade solution at a sensible price.
  • ✔ Peace of Mind Included: This unit is backed by our one-year replacement warranty.

Expert Insight: The Programming is Everything

A common mistake is buying a used or blank ECM online, only to discover it won’t work without expensive, specialized programming. Every modern GM vehicle has unique calibration files tied to its VIN for everything from the engine and transmission to emissions equipment and security systems. Our process ensures the Programmed 12704475 ECM you receive is not just a compatible part, but the correct part for your specific vehicle configuration. This is the secret to a successful and lasting repair.

Frequently Asked Questions

Do I need to do anything after installation?

Yes. In most cases, a vehicle theft deterrent system relearn (often called a security relearn) must be performed. This procedure syncs the new ECM with your vehicle’s anti-theft system. This is a standard step for this type of repair and is the responsibility of the installer. Other vehicle-specific relearns, like a crankshaft position variation relearn, may also be necessary.

How do I provide my VIN?

After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We cannot program and ship your ECM without it. Please double-check your VIN for accuracy to ensure a perfect match.

Is this a direct replacement for my original ECM?

Absolutely. This module, part number 12704475, is the correct service replacement for several original part numbers, including 12692069, 12680656, 12686383, and 12688528. It is designed to fit and function exactly like the original.

What if my vehicle still doesn’t start after the security relearn?

While this Programmed 12704475 ECM is the solution for a faulty module, it’s important to ensure the vehicle’s underlying issues have been correctly diagnosed. A no-start condition can also be caused by wiring, fuel system, or sensor problems. The security relearn is a mandatory step, and if issues persist, further diagnostics on the vehicle may be required.

What does the warranty cover?

This unit is backed by our one-year replacement warranty, which covers the part itself in the event of failure. Please contact us for complete details and procedures.

Year

Genuine OEM

Yes

Interchange part number

Condition

Seller refurbished

Year

2018

Model

express 2500

Make

Brand

GM

MPN

12686383

Manufacturer Part Number

, , , ,

Manufacturer Warranty

1 Year

Hardware Type

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