Restore Peak Performance to Your 2016 Express Van
The Engine Control Module (ECM), often called the powertrain control module (PCM), is the central computer of your 2016 Chevrolet Express 2500. It manages everything from fuel injection and ignition timing to transmission shift points and emissions systems. When the ECM begins to fail, it can cause a wide range of frustrating and difficult-to-diagnose problems, leaving your reliable workhorse van running poorly or even stranded. This replacement ECM is the definitive solution to restore your vehicle’s original performance, reliability, and efficiency.
Is Your 2016 Express 2500 ECM Failing?
A faulty engine computer can manifest in numerous ways, often mimicking other component failures. If you’re experiencing any of the issues below, a failing ECM could be the culprit. Proper diagnosis is key, but these are the classic warning signs that your van’s electronic brain is in trouble.
From the Diagnostic Bay
We had a 2016 Express 2500 work van come in that was a real head-scratcher. The owner complained of random stalling at stoplights and a persistent check engine light with a communication error code that other shops couldn’t solve. They had already replaced the alternator and battery. We hooked up our diagnostic tools and noticed the 5-volt reference signal would occasionally drop out. After hours of tracing wires, we isolated the issue to an internal fault within the original ECM. It was intermittently failing when it got hot. We installed one of our VIN-programmed modules, and the van fired right up. All communication codes were gone, and the stalling issue was completely resolved. The customer was back on the road making money the same day.
Common Symptoms of a Faulty Engine Control Module
- ✔ Persistent Check Engine Light (CEL) that won’t clear or returns immediately.
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Rough or erratic idling.
- ✔ A noticeable decrease in fuel economy.
- ✔ Harsh or incorrect automatic transmission shifting.
- ✔ Complete no-start or no-spark condition.
- ✔ Communication errors with diagnostic scan tools.
- ✔ Misfire codes even after replacing spark plugs and coils.
The Plug-and-Play Solution: A Pre-Programmed Module
Don’t waste time and money at a dealership. This module arrives at your door fully programmed to your specific vehicle. We use your Vehicle Identification Number (VIN) to load the latest, most stable GM-approved software for your 2016 Express 2500’s exact configuration. This critical step ensures that the module communicates perfectly with your van’s engine, transmission, and all other onboard systems. The process is simple:
- Place your order for this ECM.
- Provide us with your vehicle’s 17-digit VIN.
- We program the module with the correct software and ship it to you.
- You or your mechanic can install the part, often in under an hour.
This replacement module, compatible with part numbers 12668866, 12668994, 12643636, 12663405, 12670335, 22819494, and 12692200, eliminates the need for expensive dealership programming or specialized tools. It’s a direct-fit, reliable solution to get your van back in service quickly.
Frequently Asked Questions
Why do I need to provide my VIN?
Your VIN (Vehicle Identification Number) is essential. It allows us to program the ECM with the exact software calibration for your van’s specific engine, transmission, and options. This ensures seamless integration and proper vehicle operation without any additional programming required.
Is this part difficult to install?
For someone with basic mechanical skills, installation is straightforward. It typically involves disconnecting the battery, unplugging the electrical connectors from the old ECM, unbolting it, and then reversing the process. On the 2016 Express Van, the ECM is located in the LH rear of the engine compartment. However, we always recommend professional installation if you are not comfortable with automotive repair.
Will this ECM require any additional security relearn procedure?
In many GM vehicles of this era, a security relearn procedure (often called a Passlock or anti-theft relearn) may be necessary after installation. This is a simple process that can be done without special tools and usually involves a sequence of turning the key on and off. We include instructions for this procedure with the part.
Will this fix my check engine light?
If the check engine light and associated codes are caused by a faulty ECM, this replacement part will resolve the issue. It is crucial to ensure that the underlying problem is the ECM itself and not a sensor or wiring issue. We recommend a proper diagnosis before ordering.
Is this compatible with other vehicles?
Yes, this module fits a wide variety of GM vehicles, including the Chevy Cruze, Sonic, Trax, Volt, Silverado, and GMC Sierra, among others. Please check the detailed fitment list on this page to confirm compatibility with your specific make, model, and year.