Is Your 2016 Express 2500 Van Running Rough?
A failing Engine Control Module (ECM), also known as the Powertrain Control Module (PCM), is the root cause of many frustrating and hard-to-diagnose issues in your 2016 Chevy Express 2500. As the central computer of your vehicle’s engine, its proper function is critical for everything from fuel economy and emissions to starting and shifting. When it begins to fail, you might experience a host of problems that can leave you stranded. This direct-replacement ECM, part number 22819494, is the definitive solution to restore your van’s performance and reliability.
We take the guesswork and hassle out of the replacement process. Unlike a generic module from a parts store or salvage yard, this unit is professionally programmed specifically for your vehicle using your unique Vehicle Identification Number (VIN). We load the latest, most stable software updates directly from GM, which often correct underlying issues the original software may have had. This means no expensive trips to the dealership for programming—it arrives at your door ready for installation.
From the Diagnostic Bay
We had a 2016 Express 2500 work van come into the shop with a complaint that was driving the owner crazy. The van would randomly stall at idle, the transmission would sometimes shift harshly, and the check engine light would come on and off with a dozen different communication codes. The owner had already replaced the battery and alternator. After hours of chasing wires, we hooked up our scope to the main communication lines and saw a noisy, erratic signal coming from the ECM. We swapped in a VIN-programmed module, and it was like a new vehicle. All the ghost-like electrical problems vanished, the engine idled smoothly, and the transmission shifted perfectly. It’s a classic case of a failing computer causing widespread, seemingly unrelated symptoms.
Common Symptoms of a Failing Engine Computer
- ✔ Check Engine Light is illuminated, often with communication-related trouble codes (U-codes).
- ✔ Engine cranks but refuses to start.
- ✔ Poor or erratic engine performance, including stalling, misfiring, or hesitation.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or incorrect automatic transmission shifting.
- ✔ Intermittent issues with other electronic systems, as the ECM communicates with them.
- ✔ The vehicle fails to pass an emissions test.
The Right Solution for Your 2016 Express 2500 ECM
Don’t let a faulty computer keep your workhorse off the road. This module is a reliable and cost-effective alternative to a dealership visit. The process is simple: place your order, provide us with your VIN, and we handle the complex programming. The module you receive will be a direct physical and electronic match for your van, ensuring a smooth installation process. In many cases, the only additional step required is a simple security relearn procedure, which can often be done without special tools.
Broad Compatibility Across the GM Lineup
While this is the perfect fit for your 2016 Express 2500 with the 4.8L or 6.0L engine, this versatile E78 controller is also the specified part for a wide range of other GM vehicles. It is a direct replacement for part numbers 12668866, 12668994, 12643636, 12663405, 12670335, 22819494, and 12692200. It fits models such as the Chevy Cruze, Sonic, Trax, Volt, Silverado, and Suburban, as well as the GMC Savana, Sierra, and Buick Encore. Please verify the part number or consult the detailed fitment list to ensure compatibility with your specific vehicle.
Frequently Asked Questions
Do I need to get this ECM programmed?
No. The main benefit of our service is that we program the module for you before it ships. Simply provide your vehicle’s VIN during or after checkout, and it will arrive ready to install.
What is a VIN and why do you need it?
The VIN is your vehicle’s unique 17-digit serial number. It contains critical information about your van’s specific options, engine, transmission, and emissions systems. We use it to load the exact GM-certified software your vehicle requires for proper operation.
Where is the ECM located on my 2016 Express 2500 Van?
On the 2016 Express and Savana vans, the Engine Control Module is typically located in the left-hand (driver’s side) rear corner of the engine compartment, mounted to a bracket.
Will this fix my check engine light?
If the check engine light is on due to an internal failure of the original ECM, then yes, this replacement part will resolve the issue. However, if the light is on for another reason (e.g., a bad oxygen sensor), you will still need to repair that separate issue.
Is any other procedure needed after installation?
In most cases, you may need to perform a security relearn procedure (also called a CASE relearn or anti-theft relearn). This syncs the new ECM with your vehicle’s anti-theft system and crankshaft position sensor. This procedure can typically be done without special tools and instructions are widely available online.