Restore Full Functionality to Your GMC Truck
Are you chasing down bizarre electrical issues in your 2003-2006 GMC Yukon XL 2500? One day the power windows don’t work, the next the A/C is dead, and the security light is flashing for no reason. As a technician with over two decades of experience, I’ve seen these exact symptoms hundreds of times, and they almost always point to a failing Body Control Module (BCM). The BCM is the central hub for your truck’s body electronics, and when it goes, it can create a cascade of frustrating and seemingly unrelated problems. This replacement module, part number 15136877, is the definitive solution to get your Yukon XL 2500 running reliably again.
We take the guesswork and expensive dealership visits out of the equation. Each module is expertly programmed to your vehicle’s specific VIN before it ships, ensuring it works correctly right out of the box. This isn’t just a part; it’s a complete, hassle-free fix that restores control over your lights, locks, climate system, and more, just like the day it left the factory.
A Technician’s Notebook
I once had a 2005 Yukon XL 2500 in the shop that was a diagnostic nightmare for the owner. The radio would randomly shut off, the driver’s side power window had a mind of its own, and the airbag light was on, throwing a B1001 code. The owner had already replaced the window switch and checked fuses to no avail. After a quick scan, I saw multiple communication errors pointing to the BCM. We swapped in a VIN-programmed module, and in less than 10 minutes, every single issue was resolved. This is a classic case where one single component, the 2003-2006 Yukon XL 2500 BCM, can solve a host of problems.
Is Your Yukon XL Showing These Signs of BCM Failure?
If you’re experiencing any of the following, a faulty BCM is the likely culprit:
- ✔️ Intermittent or non-working HVAC and blower motor controls.
- ✔️ Erratic power windows, door locks, or interior/exterior lights.
- ✔️ An active airbag warning light, often with Diagnostic Trouble Code (DTC) B1001.
- ✔️ Security system malfunctions, causing no-start or crank-no-start conditions.
- ✔️ Strange grounding issues or a cluster of unrelated electrical gremlins.
- ✔️ Communication loss codes (U-codes) stored in the system.
A Straightforward Guide to Your BCM Installation
You don’t need to be a master mechanic to install this part. The process is simple and typically takes just a few minutes.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work. This prevents shorts and helps reset the vehicle’s systems.
- Locate the BCM: On your Yukon XL 2500, the Body Control Module is located under the driver’s side of the dashboard, near the steering column.
- Remove the Old Module: Carefully unplug the electrical connectors from the old BCM. They have release tabs that need to be pressed. Once unplugged, unbolt or unclip the module from its mounting bracket.
- Install the New Module: Seat the new, pre-programmed BCM into the mounting bracket and securely plug in all the electrical connectors. You’ll hear a click as they lock into place.
- Reconnect and Test: Reconnect the negative battery terminal. Start your vehicle and test all functions—windows, locks, lights, wipers, and HVAC—to confirm the repair was successful.
Post-Installation Note: In some cases, if the airbag light was on, a professional scan tool may be required to perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the airbag system. This is a simple step for any qualified technician.
Verified Vehicle Compatibility
This module is a direct replacement for a wide range of GM vehicles. While this page focuses on the 2003-2006 Yukon XL 2500 BCM, it is also compatible with the following models. Please verify your part number (15136877 or an interchange like 15116066) for a perfect match.
Frequently Asked Questions
Do I need to take my truck to the dealer for programming after installation?
No. This Body Control Module comes fully programmed to your vehicle’s VIN. It’s designed for a plug-and-play installation, saving you time and the high cost of dealership programming.
What if my airbag light is on after I install the new BCM?
If the airbag light remains on, it simply means the new BCM needs to be synced with the airbag system’s Sensing and Diagnostic Module (SDM). A mechanic with a bi-directional scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure in a few minutes to clear the light.
Is there a core charge for this part?
No, there is no core charge. You can keep your old module without the hassle of sending it back.
Will this fix a no-start problem?
It can. The BCM is tied into the vehicle’s anti-theft and security system (Passlock/VATS). If the BCM fails, it can prevent the vehicle from starting. If your no-start issue is combined with other electrical symptoms, a faulty BCM is a very strong possibility.
What part numbers does this interchange with?
This module is a direct replacement for part number 15136877 and is also interchangeable with 10383536, 15116066, 15136225, 15137393, 15198116, and several others.