Get Your Workhorse Back on the Road, Fast.
A non-running or poorly performing 2016 Express 3500 isn’t just an inconvenience—it’s a direct hit to your bottom line. When the Engine Control Module (ECM) fails, your van’s reliability disappears, leaving you with frustrating no-starts, a persistent check engine light, and a vehicle you can’t depend on. This replacement ECM is the definitive, hassle-free solution to get your van running right and back to earning its keep.
Common Symptoms & Your Solution
If your Express van is experiencing issues like a check engine light with codes (especially P0601, P0602, or P0606), rough idling, stalling, poor fuel economy, or erratic transmission shifting, a failing ECM is the likely culprit. This unit is designed to be the direct solution. We take the guesswork out of the repair by pre-flashing this module with the latest official GM software, tailored specifically to your van’s Vehicle Identification Number (VIN). This ensures that once installed, it communicates perfectly with your vehicle’s systems, restoring original performance and dependability. This is the professional-grade fix you need to solve the problem correctly the first time.
Features & Benefits
- ✔ VIN-Programmed for Your Van: This module arrives ready for installation. No need for expensive trips to the dealership for programming—we handle it all before it ships.
- ✔ Plug & Play Installation: Simply disconnect the battery, swap the old module with this one, reconnect the battery, and you’re ready to go.
- ✔ Loaded with Latest GM Updates: We flash the unit with the most current GM software, ensuring optimal engine performance, fuel efficiency, and emissions control.
- ✔ Restores Peak Performance: Eliminates rough idle, hesitation, and poor fuel mileage caused by a faulty computer, making your van powerful and efficient again.
- ✔ Direct Fit & Function: Guaranteed compatibility with a wide range of GM vehicles, including part numbers 12668866, 12668994, 12643636, and more.
- ✔ Purchase with Confidence: This unit is backed by our one-year replacement warranty.
An Expert’s Note on VIN Programming
As a technician, I’ve seen countless people try to save a few dollars by installing a used ECM from a salvage yard. It almost never works. Modern GM vehicles have sophisticated anti-theft systems (like Passlock/VATS) that are tied to the original vehicle’s VIN. A mismatched ECM will prevent the vehicle from starting, period. Our process of programming the module to your specific VIN before shipping is what makes this a true plug-and-play solution. It bypasses all those complex security relearns and dealer-level tool requirements, saving you hundreds in labor and towing fees. This isn’t just a part; it’s a complete, ready-to-install solution.
Don’t let a faulty computer keep your business parked. By providing us with your VIN at checkout, you’re getting a fully prepared programmed 2016 Express 3500 ECM that will solve your issues and restore the reliability your work demands. This is the smartest, most efficient way to get your van back in service.
Frequently Asked Questions
What do I need to do after I place my order?
After you complete your purchase, you must provide us with your vehicle’s 17-digit VIN. We cannot ship your part until we have this information, as we use it to flash the module specifically for your vehicle’s configuration.
Is this part difficult to install?
For most individuals with basic mechanical skills, this is a straightforward installation. The ECM is typically located in the engine bay. The process involves disconnecting the vehicle’s battery, unplugging the electrical connectors from the old ECM, unbolting it, and then reversing the process to install the new one. No special programming tools are required.
Will this definitely fix my check engine light?
This ECM is a direct solution for issues and diagnostic trouble codes related to the engine computer itself (e.g., P0601 – Internal Control Module Memory Check Sum Error). While it resolves many common running problems, we always recommend a proper diagnosis by a qualified mechanic to ensure the ECM is the root cause of your issue before ordering.
Is any other procedure required after installation?
In some cases, a Case Crankshaft Variation Relearn procedure may be needed to clear a P1336 trouble code. This does not prevent the vehicle from running but is required for the system to fine-tune its readings. Many high-end scan tools can perform this procedure, or a local repair shop can do it quickly.
What vehicles does this part fit?
This versatile ECM fits a wide variety of GM vehicles, including the 2016 Express/Savana 2500/3500 vans, Silverado/Sierra 2500/3500 pickups with the 6.0L engine, Chevy Cruze, Sonic, Trax, and more. Please check the detailed fitment list on this page to confirm compatibility.
How does the one-year warranty work?
This unit is backed by our one-year replacement warranty. If the module fails within one year of the purchase date, we will provide a replacement unit. Please contact us for assistance with the warranty process.