Restore Peak Performance to Your GM Vehicle
Is your work van or daily driver suddenly unreliable? Dealing with a frustrating no-start condition, erratic engine behavior, or a persistent Check Engine Light can bring your day to a grinding halt. As a technician with over 20 years of experience, I’ve seen firsthand how a failing Engine Control Module (ECM) can mimic a dozen other problems, leading to wasted time and money on incorrect diagnoses. This isn’t just a component; it’s the central computer for your engine, and when it falters, everything from fuel economy to transmission shifting can be affected.
We take the guesswork and dealership hassle out of the equation. This genuine OEM Engine Control Module is meticulously tested and prepared for your specific vehicle. The most critical step, programming, is handled by our experts before we ship. We use your vehicle’s VIN to load the latest, most stable software updates directly from GM. This ensures that when the part arrives, it’s ready for a straightforward installation, restoring the precise control and reliability your vehicle had from the factory.
Case Study: A Tricky Diagnosis
A few months back, a 2016 Express 2500 work van came into my shop. The owner, a local plumber, was at his wit’s end. The van would randomly stall at traffic lights and sometimes refuse to restart for 10-15 minutes. He’d already replaced the fuel pump and crankshaft position sensor with no luck. The only codes stored were a generic U0100 (Lost Communication with ECM) and an intermittent P0601 (Internal Control Module Memory Check Sum Error). These codes point directly to the ECM itself. Instead of a costly trip to the dealer for a new module and programming, we ordered a VIN-programmed unit like this one. The installation took less than 30 minutes, and after a quick security relearn, the van was running perfectly. It’s been back on the road for months without a single hiccup—a testament to getting the right, properly prepared part the first time.
Is Your Vehicle Showing These Symptoms?
A failing ECM can cause a wide array of issues. If you’re experiencing any of the following, a faulty engine computer could be the culprit:
- ✔ Check Engine Light is on with communication codes (U-codes) or internal processor codes (e.g., P0601, P0606).
- ✔ Engine cranks but refuses to start.
- ✔ Unexplained drops in fuel efficiency.
- ✔ Rough idling, stalling, or hesitation during acceleration.
- ✔ Automatic transmission shifting erratically or harshly.
- ✔ Apparent loss of spark or fuel injector pulse.
- ✔ Your scan tool cannot communicate with the ECM.
A Straightforward Guide to Installation
Installing your pre-programmed 2016 Express 2500 Van ECM is a manageable job for a DIYer or a quick task for any professional. Follow these steps for a smooth replacement.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent accidental reconnection.
- Locate the ECM: On the 2016 Express/Savana vans, the ECM is typically found in the engine compartment on the driver’s side, near the firewall or inner fender.
- Disconnect Connectors: Carefully release the locking tabs on the electrical wiring harnesses and pull them straight out from the module. Do not force them. Inspect the connectors for any corrosion or damage.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket. Keep the hardware, as you may need to reuse it.
- Install the New Module: Mount your new, pre-programmed ECM in place and secure it with the original hardware.
- Reconnect Everything: Firmly plug the wiring harnesses back into the new ECM until they click into place. Reconnect the negative battery terminal.
- Perform Security Relearn (If Necessary): Many GM vehicles require a simple key-cycle security relearn procedure to sync the new ECM with the anti-theft system. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’, and repeating two more times before starting the engine. Consult your vehicle’s specific procedure if needed.
Verified Vehicle Compatibility
This module is a direct replacement for a wide range of General Motors vehicles. It is compatible with part numbers 12668866, 12668994, 12643636, 12663405, 12670335, 22819494, and 12692200. Please verify your part number or contact us with your VIN to confirm fitment for models including:
- Buick Encore: 2013-2016 (1.4L)
- Cadillac ELR: 2014-2016
- Chevrolet Cruze: 2012-2016 (Gasoline, including Limited)
- Chevrolet Express 2500/3500 Van: 2016 (4.8L, 6.0L)
- Chevrolet Silverado 2500/3500 Pickup: 2012-2016 (6.0L)
- Chevrolet Sonic: 2012-2016 (1.4L)
- 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 Pickup (including Denali): 2012-2016 (6.0L)
Frequently Asked Questions
What does ‘VIN Programmed’ mean?
It means we flash the module with your vehicle’s unique 17-digit Vehicle Identification Number (VIN). This process loads the correct software, calibrations, and anti-theft information, making the module a true plug-and-play part for your specific car or truck.
Do I need to take my vehicle to a dealer after installation?
No. Because we program the module to your VIN before shipping, you can skip the expensive trip to the dealership for programming. In some cases, a simple ‘key relearn’ procedure may be required, which you can do yourself in your driveway.
How do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your VIN. We cannot ship the module until we receive this information, as the programming is essential for the part to function correctly.
Is this a reliable part?
Absolutely. We use high-quality, tested OEM modules and flash them with the latest stable software from GM. This ensures you are getting a dependable solution that restores factory performance and communication.
Will this fix my Check Engine Light?
If the Check Engine Light is caused by a faulty ECM (common codes include P0601-P0606 or U0100), this part is the correct solution. However, you should always ensure other potential issues have been properly diagnosed and ruled out first.