Programmed 2007 Sierra 2500 ECM 12589297 | VIN Flashed & Ready to Install

Restore Your Truck’s Brain and Get Back on the Road

Is your 2007 Sierra 2500 or another GM vehicle plagued by frustrating, intermittent issues? A check engine light that won’t go away, rough idling, stalling, or a no-start condition can often be traced back to a single, critical component: the Engine Control Module (ECM). As a technician with over two decades of experience under the hood, I’ve seen firsthand how a failing ECM can mimic a dozen other problems, leading to expensive and incorrect repairs. This isn’t just a part; it’s the central computer for your engine, and when it fails, your vehicle’s reliability is gone.

This replacement Engine Control Module is the definitive solution. We take the biggest headache out of the repair process by pre-programming the unit specifically for your vehicle using your VIN. This means it arrives at your door with the latest, most stable software updates from GM, ready for a straightforward installation. You get to skip the expensive dealership visit for programming, saving you both time and money. This is the same reliable fix I’d perform in my own service bay to get a customer’s truck running right again.

Is Your GM Vehicle Showing These Signs of a Bad ECM?

A faulty engine computer can cause a wide array of symptoms. If you’re experiencing any of the following, a failing ECM is a likely culprit:

• ✔ Check Engine Light is illuminated with communication codes (like U0100) or internal processor fault codes (P0601, P0606).
• ✔ The engine cranks but refuses to start.
• ✔ Unexplained drops in fuel economy.
• ✔ Stalling, stumbling, or rough idling for no apparent reason.
• ✔ Noticeable loss of power and poor acceleration.
• ✔ Transmission shifting issues or harsh engagement.
• ✔ The vehicle goes into “limp mode” with reduced power.

Your Straightforward Installation Guide

Installing your pre-programmed ECM is a job most DIYers can handle. Here’s a general guide for a typical GM truck or SUV:

1. Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait 10-15 minutes for the system to fully discharge.
2. Locate the ECM: On most 2007 GM trucks and SUVs (like the Sierra, Silverado, Tahoe), the ECM is located on the driver’s side, in front of the wheel well, under the battery tray. You will likely need to remove the battery to access it. On some cars like the Impala or G6, it may be in the air cleaner box or on the firewall.
3. Disconnect the Old Module: Carefully unplug the electrical connectors. They have locking tabs that need to be released—don’t force them.
4. Swap the Modules: Unbolt the old ECM from its bracket and mount the new one in its place.
5. Reconnect Everything: Securely plug the electrical connectors into your new ECM. You should hear a click as they lock in place. Reinstall the battery and connect the negative terminal.
6. Final Steps: In some cases, a security relearn procedure may be required, which typically involves cycling the key. Your vehicle’s service manual will have the specific, simple steps if needed. Start the engine and enjoy restored performance!

Verified Fitment For a Wide Range of GM Vehicles

This module is a direct replacement for part numbers 12589297, 12597121, 12603892, and 19210738. It is confirmed to fit the following vehicles. Please ensure your vehicle is on this list before ordering:

Frequently Asked Questions