Programmed 2007 Escalade EXT ECM 12603892 | VIN Flashed Engine Control Module

Restore Peak Performance to Your GM Vehicle

Is your 2007 Cadillac Escalade EXT or another GM truck acting up? If you’re dealing with frustrating issues like random stalling, a persistent check engine light, poor fuel economy, or a no-start condition, the problem often points directly to a failing Engine Control Module (ECM). As the brain of your vehicle’s engine, a faulty ECM can create a cascade of problems that are difficult to diagnose. This module is the definitive solution, providing a reliable and straightforward fix to get you back on the road with confidence.

This isn’t just a replacement part; it’s a complete solution. We pre-program this ECM with the latest GM-certified software, flashed specifically to your vehicle’s VIN. This critical step ensures seamless communication between the engine, transmission, and all other onboard systems. By providing your VIN at checkout, you receive a module that is truly plug-and-play, eliminating the need for an expensive trip to the dealership for programming.

Is Your GM Truck Showing These Signs of ECM Failure?

• ✔ Check Engine Light is on with codes like P0601 (Internal Control Module Memory Check Sum Error) or P0606 (ECM/PCM Processor Fault).
• ✔ The engine cranks but refuses to start.
• ✔ Unexplained drops in fuel efficiency.
• ✔ The vehicle stalls intermittently, especially when warm.
• ✔ Rough or unstable idling.
• ✔ Noticeable loss of power and poor acceleration.
• ✔ Automatic transmission shifts erratically or harshly.

A Straightforward Guide to Installation

Replacing the ECM on these GM trucks and SUVs is a job most DIYers can handle with basic tools. Follow these steps carefully for a successful installation.

1. Safety First: Always disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent any accidental reconnection.
2. Locate the ECM: On most compatible trucks and SUVs (like the Escalade, Tahoe, Silverado), the ECM is located under the battery tray on the driver’s side of the engine compartment. You will likely need to remove the battery to access it. On some cars like the Impala or Monte Carlo, it’s attached to the air cleaner box.
3. Disconnect the Connectors: Carefully unlatch and remove the wiring harness connectors from the old ECM. Inspect them for any corrosion or damage. Clean them with electrical contact cleaner if necessary.
4. Remove the Old Module: Unbolt the old ECM from its mounting bracket and remove it from the vehicle.
5. Install the New Module: Mount your new, pre-programmed ECM onto the bracket and securely reconnect the wiring harnesses. Ensure they click into place.
6. Reconnect the Battery: Reinstall the battery (if removed) and reconnect the negative battery terminal.
7. Perform Security Relearn: Your vehicle’s anti-theft system may need to be relearned. This is a simple procedure: Turn the key to the ‘ON’ position for 10-15 minutes, or until the security light stops flashing and turns off. Turn the key off for 10 seconds, then repeat the process two more times. After the third cycle, the vehicle should start and run normally.

Verified Compatibility for a Wide Range of GM Vehicles

This module is a direct replacement for part numbers 12589297, 12597121, 12603892, and 19210738. It is guaranteed to fit the following models:

• ✔ 2007 Cadillac Escalade, Escalade ESV, Escalade EXT
• ✔ 2007 Chevrolet Avalanche 1500, Suburban 1500/2500, Tahoe
• ✔ 2007 Chevrolet Silverado 1500/2500/3500 (New Style)
• ✔ 2007 GMC Sierra 1500/2500/3500 & Denali (New Style)
• ✔ 2007 GMC Yukon & Yukon XL 1500/2500
• ✔ 2007 Hummer H2
• ✔ 2006-2007 Chevrolet Corvette
• ✔ 2007 Chevrolet Equinox & Pontiac Torrent
• ✔ 2007 Chevrolet Impala & Monte Carlo (3.5L/3.9L)
• ✔ 2007 Chevrolet Malibu (3.5L/3.9L)
• ✔ 2007 Pontiac G6 (3.5L/3.9L)
• ✔ 2008 Pontiac G8 (6.0L)
• ✔ 2007 Saturn Aura (3.5L)