Restore Your Workhorse: The Reliable Fix for Your GM Van’s Brain
As a technician with over two decades of experience, I know that when a work van like your 2016 Savana 3500 goes down, it’s more than an inconvenience—it’s lost time and money. If you’re dealing with frustrating issues like a persistent check engine light, poor engine performance, stalling, or a no-start condition, the problem often points directly to a failing Engine Control Module (ECM). This isn’t just another part; it’s the central computer responsible for engine management, fuel delivery, and emissions. A faulty one can cause chaos, leading to incorrect diagnostics and wasted hours in the shop.
This replacement Engine Control Module is the definitive solution. We take the guesswork and hassle out of the repair by pre-programming the module specifically for your vehicle using your VIN. This means it arrives at your door loaded with the latest, most stable software updates from General Motors. You get a component that’s ready for installation, restoring the precise performance and reliability your vehicle had when it left the factory. Don’t let a bad ECM keep your van off the road. Get the correct, programmed part and solve the problem right the first time.
Case Study: A Tricky Diagnosis
I remember a 2016 Express van (the Savana’s twin) that came into my bay with an intermittent crank-no-start condition that was driving the owner crazy. He’d already replaced the fuel pump and crank sensor. We scanned it and found a U0100 (Lost Communication with ECM) code that would come and go. After checking the wiring harness and connectors for the third time, we tested the ECM’s power and ground feeds, which were solid. The only logical conclusion was an internal failure in the module itself. We installed a VIN-programmed ECM just like this one. The van fired up on the first try and never had the issue again. It’s a classic example of how a failing computer can mimic other component failures, making a direct-fit, programmed module the most efficient fix.
Is Your Vehicle Showing These Common ECM Failure Symptoms?
- ✔ Check Engine Light is on with codes like P0601, P0606, or U0100.
- ✔ The engine cranks but refuses to start.
- ✔ Unexplained drops in fuel economy.
- ✔ Rough idling, stalling, or hesitation during acceleration.
- ✔ Automatic transmission shifting erratically.
- ✔ Apparent loss of power.
- ✔ Communication issues with your OBD-II scan tool.
A Straightforward Guide to Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes to ensure the system is fully discharged.
- ✔ Locate the ECM: On the 2016 Savana/Express vans, the ECM is typically located in the engine compartment on the driver’s side, near the firewall or inner fender.
- ✔ Disconnect Connectors: Carefully release the locking tabs and unplug the wiring harness connectors from the old module. Avoid pulling on the wires themselves.
- ✔ Remove the Old Module: Unbolt the old ECM from its mounting bracket. Keep the mounting hardware, as you’ll need it for the new unit.
- ✔ Install the New Module: Mount your new, pre-programmed ECM onto the bracket and secure it with the original hardware.
- ✔ Reconnect Everything: Plug the wiring harness connectors firmly into the new module until they click into place. Reconnect the negative battery terminal.
- ✔ Perform Relearn (If Necessary): In many cases, you’re done. However, some GM vehicles may require a simple security relearn procedure (often called a Passlock or anti-theft relearn). This can typically be done without special tools by cycling the ignition key and can be found in your owner’s manual or online.
Will This Fit My Vehicle?
This module is a direct replacement for part number 22819494 and is interchangeable with several other part numbers, including 12668866, 12668994, 12643636, and more. It is guaranteed to fit the following vehicles with the specified options:
- Buick Encore: 2013-2016 (1.4L)
- Cadillac ELR: 2014-2016
- Chevrolet Cruze: 2012-2016
- 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
- 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 & Denali Pickup: 2012-2016 (6.0L)
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to program the Engine Control Module with the exact software and calibrations specified by GM for your vehicle’s unique configuration, including engine, transmission, and emissions options. This ensures perfect compatibility and performance.
Is any additional programming required after installation?
No. This module arrives pre-programmed and ready for installation. In some cases, a simple, tool-free anti-theft relearn procedure may be needed, which involves cycling the ignition key. This does not require a trip to a dealer or mechanic.
Will this fix my check engine light?
If the check engine light is caused by a faulty ECM (e.g., codes P0601, P0606), then yes, this part will resolve the issue. It’s crucial to ensure the underlying problem is the module itself and not a separate sensor or wiring issue.
How is this different from buying a used ECM from a junkyard?
A used module from another vehicle is programmed for that specific car’s VIN and options. It will not work correctly in your vehicle and will likely cause more problems or prevent it from starting. Our service provides a module specifically flashed for YOUR vehicle.
Where is the ECM located on my 2016 Savana 3500?
On most 2016 Savana and Express vans, the ECM is found in the engine bay, mounted on the driver’s side near the brake master cylinder or firewall.