Programmed 2008 Escalade ESV Engine Control Module ECM 12617568

Restore Your Cadillac’s Brain and Bring Performance Back to Life

As a technician with over two decades of experience under the hood, I’ve seen firsthand the frustration that a failing Engine Control Module (ECM) can cause. Your 2008 Cadillac Escalade ESV is a sophisticated machine, and its ECM is the central command center, managing everything from fuel injection and spark timing to transmission shifts and emissions. When it starts to fail, it can create a cascade of confusing and performance-robbing problems. This isn’t just a part; it’s the solution to getting your reliable, powerful SUV back on the road without the dealership price tag and hassle.

This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take the guesswork and the extra steps out of the repair. Before this module ever leaves our facility, it is professionally programmed with the latest GM-certified software, specifically matched to your vehicle’s unique VIN. This means you skip the expensive trip to the dealer for programming. For a DIY enthusiast or a professional shop, this saves critical time and money, turning a complex electronic repair into a straightforward swap.

Is Your Escalade Showing These Signs of ECM Failure?

A faulty ECM can manifest in many ways, from obvious to subtle. If you’re experiencing any of the following, a failing engine computer is a likely culprit:

• ✔ Check Engine Light is illuminated with codes like P0601 (Internal Control Module Memory Check Sum Error) or P0606 (ECM/PCM Processor Fault).
• ✔ Engine cranks but refuses to start.
• ✔ Unexplained drops in fuel economy.
• ✔ The engine stalls, stumbles, or misfires intermittently.
• ✔ Harsh or incorrect automatic transmission shifting.
• ✔ Communication errors with other modules on the vehicle network.
• ✔ Failure to pass state emissions testing.

Your Straightforward 5-Step Installation Guide

Installing your new 2008 Escalade ESV Engine Control Module is a manageable job for a confident DIYer. The ECM is typically located on the driver’s side of the engine compartment, under the battery tray.

1. Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes for the system to discharge completely.
2. Access the Module: You will likely need to remove the battery and the battery tray to gain clear access to the old ECM. Note the orientation of the electrical connectors.
3. Disconnect and Remove: Carefully unplug the wiring harness connectors. They have locking tabs that need to be released. Once disconnected, unbolt the old module from its mounting bracket and remove it.
4. Install the New ECM: Mount the new, pre-programmed module in the same location. Securely reconnect the wiring harnesses, ensuring the locking tabs click into place. Reinstall the battery tray and battery, then reconnect the negative battery terminal.
5. Perform Security Relearn: This is a critical final step. Turn the key to the ‘ON’ position (do not start the engine) for 10-12 minutes. The ‘Security’ light on the dash should turn off. Turn the key off for 10 seconds, then repeat this cycle two more times (for a total of 3 cycles / ~30 minutes). After the third cycle, the vehicle will be relearned to the new ECM and is ready to start.

Verified Fitment for a Wide Range of GM Vehicles

This module, identified by part numbers 12617568, 12612384, or 12622141, is compatible with a vast array of General Motors vehicles. Please verify your specific model and engine options below to ensure a perfect match.