Is Your Work Van Letting You Down?
As a technician with over two decades of experience, I know that a reliable work van is non-negotiable. When your 2016 Express 3500 starts acting upโstalling at intersections, refusing to start, or flashing that dreaded check engine lightโit’s not just an inconvenience; it’s costing you time and money. Often, the culprit is a failing Engine Control Module (ECM), the central computer that manages everything from fuel delivery to transmission shifting.
A Real-World Scenario: The Intermittent Stall
“A customer’s 2016 Express 3500 work van came into my shop last month with a problem that was driving him crazy. It would run perfectly for days, then suddenly stall in traffic with no warning. No codes, no consistent pattern. After checking fuel pressure and ignition systems, we traced it to a heat-soaked ECM. The internal circuits were failing intermittently when the engine bay got hot. Replacing the ECM with a properly programmed unit solved the issue completely, getting his business back on the road without the fear of another random shutdown.”
Symptoms of a Failing GM ECM:
- โ Check Engine Light is on with various communication or sensor codes.
- โ Engine cranks but refuses to start.
- โ Poor fuel economy and rough idling.
- โ Intermittent stalling or hesitation during acceleration.
- โ Transmission shifting issues or getting stuck in one gear.
- โ Loss of power and overall poor engine performance.
The Direct-Fit Solution: A 2016 Express 3500 ECM Programmed for You
Don’t let a faulty computer sideline your vehicle. This Engine Control Module is the reliable, cost-effective solution you need. We take the guesswork and dealer hassle out of the equation. When you order, simply provide us with your vehicle’s VIN. Our experts will then flash the module with the latest, most stable software updates directly from GM, ensuring it’s a perfect match for your specific vehicle configuration. It arrives at your door ready to install, no expensive dealership programming required.
Plug-and-Play Installation: No Dealer Visit Required
You can get your Express van running right again in your own driveway. Follow these simple steps:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the ECM: On the 2016 Express 3500, the ECM is typically located in the engine compartment on the driver’s side, near the firewall or inner fender.
- Disconnect Connectors: Carefully unclip and remove the electrical harness connectors from the old module. Inspect them for any corrosion or bent pins.
- Remove the Old Module: Unbolt the original ECM from its mounting bracket and remove it from the vehicle.
- Install the New Module: Bolt your new, pre-programmed ECM into place.
- Reconnect Everything: Firmly plug the harness connectors into the new module until they click. Reconnect your battery terminal.
- Perform Security Relearn (If Necessary): In most cases, the vehicle will start and run perfectly. Some GM vehicles may require a simple security relearn procedure which can be done without any special tools. Instructions are readily available online or in your service manual.
Expert Pro Tip: Check for Oil Intrusion
Before installing your new ECM, take a moment to inspect the engine harness connectors for any signs of engine oil. On the 4.8L and 6.0L engines, a leaking oil pressure sensor can sometimes wick oil all the way through the wiring harness and into the ECM connector. This can damage the new module over time. If you see oil, clean the connectors thoroughly with electrical contact cleaner and consider replacing the oil pressure sensor to prevent future issues.
Guaranteed Compatibility
This module is a direct replacement for a wide range of GM vehicles, but our VIN-specific programming makes it the perfect fit for YOURS. It is the correct service replacement for the following part numbers:
Part Numbers: 12668866, 12668994, 12643636, 12663405, 12670335, 22819494, and 12692200.
By ordering from us, you’re not just buying a part; you’re getting a complete solution backed by years of hands-on diagnostic experience. Restore your vehicle’s performance and reliability today.