Restore Peak Performance to Your GM Vehicle’s Engine
As a technician with over two decades of experience under the hood, I know the frustration that comes with a vehicle that won’t run right. When your 2016 Express 3500 Van is stalling, hesitating, or throwing a persistent Check Engine Light, the Engine Control Module (ECM) is often the culprit. This isn’t just a simple component; it’s the brain of your engine, managing everything from fuel delivery and ignition timing to emissions and transmission shifting. A failing ECM can bring your work van or daily driver to a complete halt, costing you time and money.
This replacement ECM, part number 22819494, is the definitive solution to get your vehicle back in top form. We take the guesswork and hassle out of the repair by pre-programming the module specifically for your vehicle using the VIN you provide. This means it arrives with the latest GM factory software updates, ensuring optimal performance and compatibility right out of the box. You’re not just buying a part; you’re getting a reliable, plug-and-play fix that restores the precise operational parameters your engine was designed for.
A Technician’s Notebook: The Ghost in the Machine
I remember a 2016 Express 3500 work van that came into my bay with a truly baffling issue. The owner, a local contractor, said it would randomly lose power and sometimes refuse to start, but there were no consistent trouble codes—just a few random communication errors (U-codes) that would come and go. We checked wiring, sensors, and grounds for two days. Finally, on a hunch, we monitored the ECM’s internal voltage while tapping on the case. We saw the voltage flicker, confirming an internal failure. After installing a VIN-programmed 2016 Express 3500 Engine Control Module, the van ran perfectly. It’s a classic example of how a failing ECM can create ghost-like symptoms that defy simple diagnosis.
Is Your Vehicle Showing These ECM Failure Symptoms?
- ✔ Unexplained Check Engine Light illumination
- ✔ Engine stalling, stumbling, or hesitating during acceleration
- ✔ No-start or hard-starting conditions
- ✔ Noticeable decrease in fuel economy
- ✔ Rough or erratic idle
- ✔ Transmission shifting problems or harsh shifts
- ✔ Diagnostic Trouble Codes (DTCs) related to internal processor failure (e.g., P0601, P0606) or communication loss (e.g., U0100)
A Straightforward Guide to Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- ✔ Locate the ECM: On the 2016 Express/Savana vans, the ECM is typically found in the left-hand rear of the engine compartment. For other models, its location may vary (e.g., LH front on Silverado/Sierra).
- ✔ Disconnect Connectors: Carefully release the locking tabs on the electrical harness connectors and pull them straight out from the module. Do not force them.
- ✔ Remove the Old Module: Unbolt the old ECM from its mounting bracket. Keep the hardware as you will need it for the new module.
- ✔ Install the New Module: Mount your new, pre-programmed 2016 Express 3500 Engine Control Module onto the bracket and securely tighten the bolts.
- ✔ Reconnect Everything: Plug the harness connectors firmly back into the new ECM until they click into place. Reconnect the negative battery terminal.
- ✔ Perform Relearn Procedure: In many cases, a security relearn procedure (often called a Passlock or Passkey relearn) is required. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’ for 10 seconds, and repeating this cycle three times. Consult your vehicle’s service information for the specific procedure.
Verified Vehicle Compatibility
This module is a direct-fit replacement for a wide range of GM vehicles. The key is providing your VIN so we can load the precise software for your application. This part is compatible with the following models, but always verify your original part number matches one of those listed below.
- Buick Encore: 2013-2016 (1.4L)
- Cadillac ELR: 2014-2016
- Chevrolet Cruze: 2012-2015, 2016 (Limited)
- Chevrolet Express 2500/3500 Van: 2016 (4.8L, 6.0L)
- Chevrolet Silverado 2500/3500 Pickup: 2012-2016 (6.0L)
- Chevrolet Sonic: 2012-2016
- Chevrolet Spark: 2014-2015 (Gasoline)
- Chevrolet Suburban 3500: 2016
- Chevrolet Trax: 2013-2016
- Chevrolet Volt: 2011-2015
- GMC Savana 2500/3500 Van: 2016 (4.8L, 6.0L)
- GMC Sierra 2500/3500 & Denali Pickup: 2012-2016 (6.0L)
This module replaces the following part numbers: 12668866, 12668994, 12643636, 12663405, 12670335, 22819494, 12692200.
Frequently Asked Questions
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to program the ECM with the exact software and calibrations for your specific vehicle, including engine, transmission, and emissions options. This ensures a perfect match and seamless operation.