Restore Your Van’s Performance and Reliability
Is your 2016 Chevy Express 2500 Van suddenly unreliable? Are you dealing with frustrating issues like stalling at stoplights, a persistent check engine light, or a no-start condition that’s costing you time and money? As a technician with over two decades of experience, I’ve seen how a faulty Engine Control Module (ECM) can turn a dependable workhorse into a source of constant headaches. This isn’t just a part; it’s the brain of your engine, and when it fails, it can create a cascade of confusing problems. This replacement 2016 Express 2500 Van ECM is the definitive solution to get your vehicle running smoothly again.
We take the guesswork and high cost out of the repair. Unlike a generic module from a parts store or a costly trip to the dealership, this ECM arrives at your door fully programmed with the latest GM software updates. All we need is your vehicle’s VIN during checkout. This means no special scan tools or expensive programming sessions are required. It’s a direct-fit, ready-to-install solution designed to restore your van’s original factory performance, fuel efficiency, and dependability.
Case Study: A Tricky Diagnosis
I remember a 2016 Express 2500 from a local plumbing company that came into my bay. The complaint was intermittent stalling and a random loss of power, but no consistent check engine light. The driver was losing faith in his work van. We checked the fuel pressure, ignition system, and sensors—all tested fine. After hours of diagnostics, we finally captured a freeze-frame data glitch pointing to an internal processor fault in the ECM (a classic P0606 precursor). We installed a VIN-programmed module just like this one. The van was back on the road the same afternoon, and the owner called a week later to say it had never run better. These intermittent faults are often the first sign of a failing 2016 Express 2500 Van ECM.
Is Your Express Van Showing These Signs?
A failing ECM can manifest in various ways. If you’re experiencing any of the following, it’s a strong indicator that your engine’s computer may be the culprit:
- ✔ Unexplained Check Engine Light (CEL) illumination
- ✔ Engine stalling, stumbling, or hesitating during acceleration
- ✔ Complete no-start condition where the engine cranks but won’t fire
- ✔ Noticeable decrease in fuel economy
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Communication error codes, such as U0100 (Lost Communication with ECM)
- ✔ Internal module failure codes, like P0601 or P0606
A Straightforward Guide to Installation
Replacing the ECM on your Express Van is a manageable job for a confident DIYer or any professional mechanic. Our pre-programmed module simplifies the process significantly.
- Safety First: 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 Van, the ECM is typically found in the engine compartment, on the left-hand (driver’s) side, often near the firewall or inner fender.
- Disconnect and Remove: Carefully unplug the electrical connectors. Most have a locking tab that needs to be released. Once disconnected, unbolt the module from its mounting bracket.
- Install the New Module: Mount the new ECM onto the bracket and securely tighten the bolts. Reconnect the electrical harnesses, ensuring they click into place.
- Reconnect Power: Reattach the negative battery terminal.
- Perform Security Relearn: In many cases, you may need to perform a simple security relearn procedure, which can typically be done without special tools. This process pairs the new ECM with your vehicle’s anti-theft system. Instructions are readily available online or in service manuals.
Verified Vehicle Compatibility
This module is a direct replacement for part number 12670335 and other interchangeable numbers. While this listing is focused on the 2016 Express 2500 Van ECM, it also fits a wide range of other GM vehicles. Please verify your part number or consult the list below:
- CHEVROLET CRUZE (2012-2016)
- CHEVROLET ELR (2014-2016)
- CHEVROLET EXPRESS 2500/3500 VAN (2016)
- CHEVROLET SAVANA 2500/3500 VAN (2016)
- CHEVROLET SILVERADO 2500/3500 PICKUP (2012-2016)
- CHEVROLET SONIC (2012-2016)
- CHEVROLET SPARK (2014-2015)
- CHEVROLET SUBURBAN 3500 (2016)
- CHEVROLET TRAX (2013-2016)
- CHEVROLET VOLT (2011-2015)
- BUICK ENCORE (2013-2016)
- GMC SIERRA 2500/3500 PICKUP (2012-2016)
- GMC SIERRA DENALI 2500/3500 (2012-2016)
Frequently Asked Questions
How do I provide my VIN?
After completing your purchase, you will receive an email prompting you for your vehicle’s 17-digit VIN. You can also add it to the ‘notes’ section at checkout. We cannot program or ship the module without it.
Is this a simple plug-and-play installation?
Yes, for the most part. Because we program the module to your VIN, it eliminates the need for advanced scan tools. However, you may need to perform a standard security/anti-theft relearn procedure, which takes about 10-15 minutes and requires only your ignition key.
Will this fix my vehicle’s specific problem?
This ECM will correct issues directly caused by a faulty module. It’s crucial to ensure your vehicle has been properly diagnosed. If your problems are due to a bad sensor, wiring, or fuel pump, replacing the ECM will not resolve them.
What if I have a different part number on my old module?
This module replaces several part numbers, including 12668866, 12668994, 12643636, and others listed. As long as your vehicle is on the compatibility list, this programmed module will function correctly.
Does this come with the latest software?
Absolutely. We program each module using the most current software available from GM. This ensures optimal performance and addresses any known factory bugs or drivability issues.