2007 Yukon Engine Control Module 12597121 | Programmed to Your VIN

Is Your 2007 Yukon Acting Up? Get a Reliable, Pre-Programmed Solution.

If you’re dealing with a frustrating check engine light, poor fuel economy, stalling, or erratic transmission shifting in your 2007 GMC Yukon, the culprit is often a failing Engine Control Module (ECM). As the ‘brain’ of your vehicle, when the ECM starts to go, it can cause a cascade of confusing and costly problems. I’ve seen it countless times in my 20+ years in the shop: a perfectly good engine and transmission are hobbled by a faulty computer, leaving owners chasing symptoms instead of fixing the root cause.

This isn’t just a replacement part; it’s a direct solution. We are providing a dependable Engine Control Module, part number 12597121, that comes fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). This means we load the latest, most stable software from GM before it even ships. You get a module that’s ready for installation right out of the box, eliminating the need for an expensive trip to the dealership for programming.

Signs Your GM Truck’s Brain is Failing

A failing ECM can manifest in many ways. If you’re experiencing any of the following, it’s a strong indicator that your module needs replacement. Look out for:

• ✔ Persistent Check Engine Light (CEL) that won’t clear.
• ✔ Diagnostic Trouble Codes (DTCs) related to internal module failure, such as P0601, P0602, P0606, or U-series communication codes.
• ✔ The engine cranks but refuses to start (no-start condition).
• ✔ Unexplained drops in fuel efficiency.
• ✔ Harsh or erratic automatic transmission shifting.
• ✔ Misfires or stalling for no apparent reason.
• ✔ Communication issues with your diagnostic scan tool.

A Straightforward Guide to Your ECM Swap

Installing your new 2007 Yukon Engine Control Module is a manageable job for a DIYer with basic tools. While the exact steps can vary slightly by model, here is a general guide for a GMT900-platform vehicle like yours.

1. Safety First: Always disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent any accidental power surges.
2. Locate the ECM: On most 2007 GM trucks and SUVs like the Yukon, Tahoe, and Silverado, the ECM is located under the battery tray on the driver’s side of the engine compartment.
3. Access the Module: You will likely need to remove the battery and the battery tray to gain clear access to the ECM. This is typically held in by a few bolts.
4. Disconnect the Harnesses: Carefully disengage the locking tabs on the electrical connectors and pull them straight out from the module. Never force them. Inspect the connectors for any corrosion or bent pins.
5. Remove the Old ECM: Unbolt the old module from its mounting bracket and remove it from the vehicle.
6. Install the New ECM: Mount your new, pre-programmed module in place of the old one. Reconnect the electrical harnesses, ensuring they click securely into place.
7. Reassemble: Reinstall the battery tray and the battery. Reconnect the negative battery terminal.
8. Perform Security Relearn: After installation, you will need to perform a simple security relearn procedure (often called a Passlock or Passkey relearn). This syncs the new ECM with your vehicle’s anti-theft system and can usually be done without special tools. A quick search for your specific model’s “security relearn procedure” will provide the exact steps.

Will This Fit My Vehicle?

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