Programmed 2016 Savana 3500 ECM 12668991 | Engine Control Module

Get Your Van Running Right Again

Stop dealing with a frustrating Check Engine Light, stalling, or no-start conditions. This Engine Control Module for your 2016 Savana 3500 comes fully programmed to your vehicle’s VIN with the latest GM software. It’s a reliable, direct-fit solution that saves you a trip to the dealer. Restore your van’s performance and reliability today. Order now to get back on the road fast!

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SKU: 590-02768-75 Categories: ,
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Restore Your GM Vehicle’s Core Performance with a VIN-Programmed ECM

As a mechanic with over two decades of experience under the hood, I’ve seen firsthand how a failing Engine Control Module (ECM) can bring a perfectly good workhorse like a 2016 Savana 3500 to a dead stop. It’s the brain of your engine, and when it malfunctions, you get frustrating, often intermittent, problems that can be a nightmare to diagnose. This isn’t just a replacement part; it’s a direct solution, pre-programmed with the latest official GM software specifically for your vehicle’s VIN. This eliminates the costly and time-consuming trip to the dealership for programming.

When you order, simply provide your Vehicle Identification Number (VIN), and we handle the rest. We flash the module to match your vehicle’s exact specifications, ensuring all systems communicate correctly from the moment you install it. This is the most reliable way to restore factory performance, fuel efficiency, and drivability without needing specialized tools or software.

A Technician’s Notebook

I remember a case with a local plumbing company’s 2016 Express 3500—essentially the same platform as the Savana. The van would randomly refuse to start, but only after it was hot. The driver would wait 30 minutes, and it would fire right up. No consistent Check Engine Light, just lost time and money. After swapping relays and checking fuel pressure, we finally focused on the ECM. Heat soak was causing an internal fault in the processor. We installed a VIN-programmed module just like this one, and the van was back in reliable service the same afternoon. These intermittent electrical gremlins are classic signs of a failing 2016 Savana 3500 ECM.

Is Your Vehicle Showing These Symptoms?

  • ✔ Check Engine Light is illuminated with codes like P0601 (Internal Control Module Memory Check Sum Error), P0606 (ECM/PCM Processor Fault), or U-series communication codes.
  • ✔ The engine cranks but refuses to start, especially when warm.
  • ✔ Unexplained drops in fuel economy and poor engine performance.
  • ✔ Rough or unstable idling and stalling for no apparent reason.
  • ✔ Harsh or erratic automatic transmission shifting.
  • ✔ Communication errors with your diagnostic scan tool.

Straightforward Installation Guide for Your Van

Replacing the 2016 Savana 3500 ECM is a job most DIYers or any professional mechanic can handle. Follow these steps for a smooth installation.

  1. Safety First: Always disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
  2. Locate the Module: On most Savana and Express vans, the ECM is located in the left-hand (driver’s side) rear of the engine compartment.
  3. Disconnect the Connectors: Carefully release the locking tabs on the wiring harness connectors and pull them straight out from the module. Inspect them for any corrosion or damage.
  4. Remove the Old ECM: Unbolt the old module from its mounting bracket. Keep the hardware as you will need it for the new unit.
  5. Install the New ECM: Mount your new, pre-programmed module in place and secure it with the original bolts.
  6. Reconnect Everything: Plug the wiring harnesses back into the new ECM until they click securely. Reconnect the negative battery terminal.
  7. Final Step: Start the engine. Let it idle for a few minutes to allow the system to fully initialize. A security relearn procedure may be required on some models, which typically involves cycling the key.

Verified Compatibility Across GM Models

This Engine Control Module, part number 12668991, is a direct replacement for several original part numbers, including 12668866, 12668994, 12643636, and more. It is confirmed to fit a wide range of GM vehicles. Please verify your specific model and engine option below:

  • Chevrolet Express / GMC Savana 2500 & 3500 Vans (2016): With 4.8L or 6.0L engines.
  • Chevrolet Silverado / GMC Sierra 2500 & 3500 Pickups (2012-2016): With 6.0L engines.
  • Chevrolet Cruze (2012-2016): With 1.4L gasoline engines (check specific IDs or VIN P).
  • Chevrolet Sonic (2012-2016): With 1.4L engines.
  • Chevrolet Trax (2013-2016): With 1.4L engines.
  • Buick Encore (2013-2016): With 1.4L engines.
  • And many more models including the Volt, ELR, Spark, and Suburban 3500.

Frequently Asked Questions

What do you mean by ‘programmed to my VIN’?

We take your vehicle’s unique 17-digit VIN and load the exact, most current GM-approved software for that specific vehicle onto the ECM. This ensures it works perfectly with your engine, transmission, and other systems, just like a module from the dealer.

Do I need to do anything after installing this 2016 Savana 3500 ECM?

In most cases, it is a plug-and-play installation. However, some GM vehicles may require a simple security relearn procedure (often called a ‘key cycle relearn’) to sync the module with your anti-theft system. This can typically be done without any special tools.

Is this the same as a PCM?

Yes, the terms Engine Control Module (ECM) and Powertrain Control Module (PCM) are often used interchangeably. This module controls both engine and, in many cases, transmission functions.

How do I provide my VIN?

After you complete your purchase, you will need to send us a message with your vehicle’s VIN. We cannot program and ship the module without it, so please provide it promptly to avoid delays.

Condition

Refurbished

Genuine OEM

Yes

MPN

12668991

Interchange part number

PartNumber

590

Model

SAVANA 3500 VAN

Year

2012

Brand

GM

Manufacturer Part Number

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