Restore Peak Performance to Your GM Truck or SUV
Is your 2010-2014 Yukon XL 1500 suffering from perplexing issues like a persistent check engine light, rough idling, stalling, or a sudden drop in fuel economy? These are classic signs of a failing Engine Control Module (ECM), the central computer that manages your vehicle’s engine performance. A faulty ECM can disrupt everything from fuel injection timing to transmission shifting, leaving you with an unreliable and inefficient vehicle. This replacement ECM, part number 12633238, is the definitive solution to restore your vehicle’s factory performance and reliability.
From the Diagnostic Bay
We had a 2011 Sierra 1500 in the shop that was driving the owner crazy. It had a random, intermittent misfire on cylinder 3 that would come and go. He had already replaced the spark plug, ignition coil, and even the fuel injector, but the problem persisted. After hours of diagnostics, we scoped the injector driver circuit directly at the ECM connector. We found that the signal from the ECM was dropping out intermittently. The internal driver for that cylinder was failing inside the computer. We installed a VIN-programmed ECM just like this one, performed the security relearn, and the truck ran perfectly. It’s a reminder that sometimes the problem lies with the brain, not the muscle.
Symptoms of a Failing Engine Control Module
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Engine stalling or shutting off while driving.
- ✔ Rough or erratic idling.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Difficulty starting the engine or a complete no-start condition.
- ✔ Poor acceleration and overall loss of power.
- ✔ Harsh or incorrect automatic transmission shifting.
The Importance of a VIN-Programmed 2010-2014 Yukon XL 1500 ECM
Modern vehicles are complex systems, and the ECM is at the heart of it all. Simply installing a used computer from another vehicle won’t work. Each module is programmed with specific software and calibrations tailored to your vehicle’s unique Vehicle Identification Number (VIN). This includes information about the engine size, transmission type, emissions equipment, and other factory-installed options. Our process ensures you receive a true plug-and-play solution. We take your VIN, download the latest official GM software update for your specific vehicle, and flash it onto this module before it ships. This guarantees compatibility and ensures all engine and powertrain systems function exactly as the manufacturer intended, without any guesswork or expensive trips to the dealership for programming.
This module, also known by the interchangeable part number 12633055, is a direct-fit replacement for a wide array of popular GM models, including the Chevrolet Silverado, Suburban, Tahoe, GMC Sierra, Cadillac Escalade, and more. Please verify the extensive fitment list to confirm compatibility with your specific vehicle.
Do I need to program this ECM?
No. We handle all the programming for you before shipment. Simply provide us with your vehicle’s 17-digit VIN during checkout, and we will flash the module with the latest GM-certified software for your specific vehicle. It will arrive ready for installation.
Where is the ECM located on a 2010-2014 Yukon XL 1500?
On most GM trucks and full-size SUVs from this era, including the Yukon XL 1500, the ECM is located in the engine compartment on the driver’s side, near the firewall or attached to the fender well.
Will I need to perform any other procedures after installation?
In most cases, you will need to perform a security relearn procedure (also known as a Passlock or anti-theft relearn). This is a simple procedure that syncs the new ECM with your vehicle’s anti-theft system and can typically be done in your driveway with just the ignition key. Instructions are readily available online or in service manuals.
What is the difference between part numbers 12633238 and 12633055?
These are interchangeable GM service numbers for the same hardware. Functionally, they are identical. As long as the module is programmed correctly for your VIN, either part number will work perfectly in your vehicle.
Is this a guaranteed fix for my vehicle’s problems?
While this ECM resolves issues directly caused by a faulty module, it’s crucial to ensure your vehicle has been properly diagnosed. The symptoms of a bad ECM can sometimes overlap with other failing components like sensors or wiring. We recommend a thorough diagnosis by a qualified technician to confirm the ECM is the source of the problem.