Restore Your Van’s Performance and Reliability
Is your 2010-2014 Chevrolet Express 1500 Van giving you headaches? Unexplained stalling, a persistent Check Engine Light, or rough running can bring your work to a halt. As a technician with over two decades of experience, I’ve seen firsthand how a failing Engine Control Module (ECM) can cause some of the most frustrating and difficult-to-diagnose issues. It’s the brain of your engine, and when it falters, everything from fuel delivery to spark timing is compromised. This isn’t just an inconvenience; it’s a reliability issue that costs you time and money.
We offer a dependable solution: a replacement Engine Control Module, part number 12639471, that arrives at your door fully programmed and ready for installation. We take the guesswork and extra expense out of the equation. Simply provide us with your vehicle’s VIN after purchase, and our specialists will flash the module with the latest, most stable software updates directly from GM. This ensures perfect communication with your van’s specific systems, restoring its original performance and efficiency. This is the same process a dealership would use, but without the high labor costs and scheduling delays.
From the Diagnostic Bay
I remember a 2012 Express 1500 from a local plumbing company that came into my shop. The complaint was intermittent stalling at stoplights and a random no-start condition that would disappear for days at a time. The driver was losing faith in his work van. We checked all the usual suspects—fuel pump pressure, crank sensor signal, battery, and grounds—and everything tested fine. There were no hard fault codes, just a history of a generic communication error (U0100). After confirming the wiring harness was intact, we pinpointed the ECM. A standard replacement wouldn’t do; it needed to be correctly programmed. We installed a VIN-matched module like this one, and the van never had the issue again. That’s the difference a properly prepared part makes.
Is Your Van Showing These Symptoms?
A faulty ECM can manifest in numerous ways. If you’re experiencing any of the following, it might be time for a replacement. A proper diagnosis is key, but these are classic indicators of an internal module failure.
- ✔ Check Engine Light is illuminated with codes like P0601 (Internal Control Module Memory Check Sum Error) or P0606 (ECM/PCM Processor Fault).
- ✔ The engine cranks but refuses to start.
- ✔ Intermittent stalling, especially when coming to a stop or at idle.
- ✔ Noticeable decrease in fuel economy.
- ✔ Rough idling or engine misfires.
- ✔ The cooling fans run constantly, even when the engine is cold.
- ✔ Problems with the automatic transmission shifting correctly.
A Straightforward Guide to Installation
Installing your new 2010-2014 Express 1500 ECM is a manageable job for a DIYer with basic tools. Following these steps will ensure a smooth process. Remember, safety is paramount.
- 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 Express and Savana vans, the ECM is typically found in the left-hand (driver’s side) rear of the engine compartment.
- Disconnect the Connectors: Carefully release the locking tabs on the electrical harness connectors 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 mounting hardware, as you will need it for the new module.
- Install the New Module: Mount your new, pre-programmed ECM onto the bracket and secure it with the original hardware.
- Reconnect Everything: Firmly plug the electrical connectors back into the new ECM until they click into place. Reconnect the negative battery terminal.
- Final Steps: In some cases, a security relearn procedure may be necessary. This can typically be done without special tools by cycling the key. Turn the ignition to ‘ON’ for 10-15 minutes, then ‘OFF’ for 10 seconds, and repeat this cycle 2-3 times before attempting to start the engine.
Verified Vehicle Compatibility
This Engine Control Module is a direct-fit replacement for the following vehicles equipped with the 4.3L V6 engine. It is compatible with service numbers 12635043, 12639471, and 12653246. Please confirm your vehicle is on this list to ensure proper fitment.
- 2010-2014 Chevrolet Express 1500 Van: Electronic Control Module; (LH rear engine compartment), 4.3L
- 2010-2014 GMC Savana 1500 Van: Electronic Control Module; (LH rear engine compartment), 4.3L
- 2010-2013 Chevrolet Silverado 1500 Pickup: Electronic Control Module; (LH front under battery), 4.3L
- 2010-2013 GMC Sierra 1500 Pickup: Electronic Control Module; (LH front under battery), 4.3L
Frequently Asked Questions
2010-2014 Express 1500 ECM
Will this work for my van if it has a different engine?
No. This specific and its programming are designed exclusively for vehicles equipped with the 4.3L V6 engine. Please check our other listings or contact us if you have a different engine size.