Is Your 2016 Savana 3500 Experiencing Critical Engine Problems?
If your GMC Savana 3500 is suffering from a no-start condition, erratic engine behavior, stalling, or a persistent Check Engine Light that won’t go away, a failing Engine Control Module (ECM) is a very likely culprit. The ECM is the central computer of your vehicle, responsible for managing everything from fuel injection and ignition timing to transmission shifting and emissions control. When it fails, it can cause a wide range of frustrating and debilitating issues, leaving your reliable work van dead in the water.
The Direct Solution: A VIN-Programmed 2016 Savana 3500 ECM
Don’t let a faulty computer keep you off the road. This genuine OEM Engine Control Module, part number 12663405, is the definitive solution to restore your van’s performance and reliability. We take the guesswork and high cost out of the equation by pre-programming the module specifically for your vehicle before it ships. Simply provide us with your vehicle’s 17-digit VIN during checkout, and our technicians will flash the unit with the latest, most up-to-date GM factory software for your exact configuration. This ensures a seamless installation and proper communication with all other modules in your vehicle.
Expert Pro Tip
Before condemning your original ECM, it’s crucial to verify all power and ground connections to the module. A corroded ground wire or a loose connection at the fuse block can create voltage drops that mimic the symptoms of a complete computer failure. Use a digital multimeter to check for stable voltage at the ECM’s power pins and ensure there is less than 0.1 volts of resistance between the ground pins and the chassis. This simple diagnostic step can save you from replacing a perfectly good part.
Common Symptoms of a Failing Engine Control Module
- ✔ Check Engine Light: The most common indicator, often with communication error codes (U-codes) or multiple, unrelated sensor codes.
- ✔ Engine Stalling or Misfiring: The engine may stall intermittently, misfire, or run rough due to incorrect fuel and spark commands.
- ✔ No-Start Condition: The engine may crank but will not start because the ECM is not activating the fuel pump or ignition coils.
- ✔ Poor Performance and Fuel Economy: A failing module can lead to a noticeable decrease in power, acceleration, and fuel efficiency.
- ✔ Erratic Transmission Shifting: The ECM works with the Transmission Control Module (TCM), and a fault can cause harsh or incorrect shifting.
- ✔ Communication Issues: A diagnostic scan tool may be unable to communicate with the ECM, indicating a critical internal failure.
Guaranteed Compatibility and Fitment
This Engine Control Module is a direct replacement for a wide range of GM vehicles. It is compatible with several original part numbers, ensuring a perfect match for your application. Please verify that your vehicle is on the list below and that your original part number is listed here:
Interchangeable Part Numbers: 12668866, 12668994, 12643636, 12663405, 12670335, 22819494, 12692200
This part will fit these makes and models with these options:
- BUICK ENCORE: 2013-2016 (1.4L)
- CADILLAC ELR: 2014-2016
- CHEVROLET CRUZE: 2012-2016 (Gasoline models)
- CHEVROLET EXPRESS 2500/3500 VAN: 2016 (4.8L, 6.0L)
- CHEVROLET SILVERADO 2500/3500 PICKUP: 2012-2016 (6.0L)
- CHEVROLET SONIC: 2012-2016
- CHEVROLET SPARK: 2014-2015 (Gasoline model)
- CHEVROLET SUBURBAN 3500: 2016
- CHEVROLET TRAX: 2013-2016
- CHEVROLET VOLT: 2011-2015
- GMC SAVANA 2500/3500 VAN: 2016 (4.8L, 6.0L)
- GMC SIERRA 2500/3500 PICKUP: 2012-2016 (6.0L)
- GMC SIERRA DENALI 2500/3500: 2012-2016 (6.0L)
Note: This is not an exhaustive list. The critical step is providing your VIN so we can ensure the correct software is loaded for your specific vehicle.
Frequently Asked Questions
Do I need to program this ECM after I receive it?
No. This module comes fully programmed to your vehicle’s specific VIN. We flash it with the latest GM software before shipping, making it ready for installation right out of the box. You must provide your VIN at the time of purchase.
Will I need to perform a security relearn procedure?
Most GM vehicles of this era require a simple security relearn, also known as a Passlock or anti-theft relearn. This procedure can typically be done without any special tools and involves a series of key cycles. It usually takes about 30 minutes. We can provide instructions for this simple process.
Where is the ECM located on my 2016 Savana 3500?
On the 2016 GMC Savana and Chevrolet Express vans, the Engine Control Module is typically located in the engine compartment, on the left-hand (driver’s) side, towards the rear.
How do I find my vehicle’s VIN?
Your 17-digit Vehicle Identification Number (VIN) can be found on the driver’s side of the dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
Is this a brand new part?
This is a high-quality, genuine OEM part that has been thoroughly inspected and tested to ensure it meets or exceeds original factory specifications. It is guaranteed to function correctly once installed in a properly diagnosed vehicle.