2009 Express 3500 Engine Computer 12625455 Programmed to Your VIN

Is Your Workhorse Van Suddenly Unreliable?

If your 2009 Chevy Express 3500 is experiencing baffling issues like stalling for no reason, refusing to start, erratic shifting, or a persistent Check Engine Light, the problem often points directly to a failing Engine Control Module (ECM). As the brain of your vehicle’s engine, a faulty ECM can turn a dependable van into a major headache, costing you time and money. In my 20+ years as a technician, I’ve seen countless work vans sidelined by these exact symptoms, and a failing computer is one of the most common culprits.

The Direct Solution: A VIN-Programmed ECM

This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take this genuine GM-spec Engine Control Module, compatible with part numbers 12625455 and 12629009, and flash it with the latest official GM software calibrated specifically to your vehicle’s VIN. This crucial step ensures that all systems—from the transmission to the anti-theft system—communicate perfectly right out of the box.

• ✔ Eliminate Guesswork: Solves common ECM failure symptoms like no-start conditions, poor fuel economy, and random error codes.
• ✔ No Dealer Required: Arrives pre-programmed for your vehicle. This skips the expensive trip to the dealership for flashing and security relearn procedures.
• ✔ Latest Software: We load the most current GM software, which often includes fixes for drivability and efficiency that your original module may not have had.
• ✔ Restore Original Performance: Get your vehicle running the way it was designed to, with stable idle, smooth acceleration, and proper shifting.

Easy Installation for Your 2009 Express 3500 Engine Computer

Installing your new ECM is a straightforward process that you can do with basic hand tools. For the Express and Savana vans, the module is typically located in the left-hand rear of the engine compartment.

1. Safety First: Disconnect the negative terminal from your vehicle’s battery.
2. Locate the ECM: Find the existing module in your engine bay. It will have several large electrical connectors attached.
3. Disconnect and Remove: Carefully unplug the wiring harness connectors. They have locking tabs that need to be released. Then, unbolt the old module from its mounting bracket.
4. Install the New Module: Bolt the new ECM into place and securely reconnect the wiring harnesses. Ensure they click into place.
5. Reconnect Battery: Reattach the negative battery terminal.
6. Perform Security Relearn (if necessary): While our programming handles most of this, some GM vehicles require a simple 10-minute key-cycle procedure to sync with the anti-theft system. Instructions are included.

Guaranteed Compatibility

After your purchase, simply provide us with your vehicle’s 17-digit VIN. Our technicians will handle the rest, ensuring this 2009 Express 3500 Engine Computer is a perfect match. This module is a direct replacement for a wide range of GM vehicles. Please verify your model and options below:

Don’t let a faulty computer keep you off the road. Order your plug-and-play 2009 Express 3500 Engine Computer today and restore your vehicle’s health and your peace of mind.