Is Your 2016 Savana Van Running Rough? Restore Its Reliability.
For a workhorse like the 2016 GMC Savana 2500, downtime isn’t an option. When the Engine Control Module (ECM) — the brain of your vehicle’s engine — starts to fail, you’ll notice a host of frustrating and potentially costly problems. From a sudden drop in fuel economy to a van that won’t start at all, a faulty ECM can bring your work to a grinding halt. This isn’t just an inconvenience; it’s a direct hit to your productivity. You need a solution that is reliable, fast, and correct the first time. This is that solution.
This Engine Control Module, part number 12670335, is the definitive answer to your vehicle’s electronic woes. We take the guesswork and hassle out of the repair by pre-programming the module specifically for your van. Simply provide us with your Vehicle Identification Number (VIN) after purchase, and our technicians will flash the unit with the latest, most stable software updates directly from GM. This ensures perfect communication between the ECM and all other systems in your vehicle, restoring the performance and dependability you rely on every day.
From the Diagnostic Bay
We had a local contractor bring in his 2016 Savana 2500 with a ghost in the machine. The van would randomly stall at low speeds, but never threw a consistent trouble code. He’d replaced the fuel pump and a few sensors, but the problem persisted. After hooking up our professional scan tool and monitoring live data, we noticed erratic readings from the throttle position sensor, but only intermittently. The sensor itself tested fine. This pointed us to the central processor – the ECM. The internal circuits were failing under certain load conditions, causing the processor to misinterpret data and shut the engine down. We installed a VIN-programmed ECM, performed the security relearn, and the van ran perfectly. It’s a classic case where throwing parts at a problem doesn’t work; you have to address the core issue.
Symptoms of a Failing Engine Control Module
- ✔ Check Engine Light is illuminated with various, often inconsistent, trouble codes.
- ✔ Your van experiences unexplained stalling or hesitation, especially when warm.
- ✔ A noticeable decrease in fuel efficiency.
- ✔ The engine cranks but refuses to start (no-start condition).
- ✔ Poor or rough idling and misfires.
- ✔ The automatic transmission shifts erratically or harshly.
- ✔ Communication errors with diagnostic scan tools.
- ✔ Loss of power and sluggish acceleration.
Why Our Programmed 2016 Savana 2500 ECM is the Superior Choice
Replacing an ECM isn’t like changing a spark plug. Modern vehicles use complex, encrypted software that is tied directly to your specific VIN. Simply installing a used module from another vehicle will result in a no-start condition and a dashboard full of warning lights. Dealerships charge a premium for a new module and additional labor for programming. Our solution provides the best of both worlds. We supply a fully functional, tested module and handle the critical programming for you. When it arrives, it’s ready for a straightforward installation, saving you time and a costly trip to the dealer. This is the most efficient way to get your 2016 Savana 2500 ECM replaced and your van back in service.
Broad Compatibility Across the GM Lineup
While this is the perfect solution for your Savana van, this versatile E78 series ECM is also the correct fit for a wide range of other GM cars, trucks, and SUVs. It directly replaces the following part numbers: 12668866, 12668994, 12643636, 12663405, 12670335, 22819494, and 12692200. It is compatible with models such as the Chevrolet Cruze, Sonic, Trax, Volt, ELR, Spark, Silverado, and Suburban, as well as the GMC Sierra and Buick Encore. Please verify your original part number or consult the detailed fitment list to ensure this is the correct module for your specific application.
Frequently Asked Questions
Why do you need my VIN?
Your vehicle’s VIN (Vehicle Identification Number) is essential for programming the ECM. It allows us to load the exact software, calibrations, and security information for your specific engine, transmission, and options package. Without the correct VIN-based program, the module will not function in your vehicle.
Is any additional programming required after I install it?
Our goal is a plug-and-play installation. The module arrives with the core engine and transmission programming complete. However, on most GM vehicles, you will need to perform a simple security relearn procedure (also known as a key relearn or anti-theft relearn). This procedure can typically be done without any special tools and involves a sequence of key turns. Instructions are readily available online or in service manuals.
Will this fix my check engine light?
If the check engine light is caused by a faulty ECM, then yes, this will resolve the issue. However, it’s crucial to ensure that the underlying cause of the codes is not a separate faulty sensor or wiring issue. We recommend having the codes professionally diagnosed before ordering to confirm the ECM is the point of failure.
Where is the ECM located on my 2016 Savana Van?
On the 2016 Savana and Express vans, the ECM is typically located in the engine compartment, on the left-hand (driver’s side) rear area, often mounted to a bracket near the firewall or inner fender. Always disconnect the battery before attempting to remove or install the module.
How do I find my original part number?
The part number is printed on a sticker on the case of your current ECM. You will need to locate the module on your vehicle and read the number directly from the label. It will typically be a prominent 8-digit number.