Restore Full Electrical Control to Your GMC Yukon XL 2500
Are you battling frustrating electrical problems in your truck? Flickering lights, unresponsive power windows, or a malfunctioning security system can often be traced back to a single component: the Body Control Module (BCM). The BCM acts as the central command center for your vehicle’s body electronics. When it fails, it can cause a wide range of confusing and intermittent issues. This genuine OEM-quality BCM, part number 20939137, is the definitive solution for restoring your vehicle’s functionality and peace of mind.
From the Diagnostic Bay
We had a 2010 Sierra come in with the owner convinced he needed a new A/C compressor. The blower motor was dead, and the controls were unresponsive. After a quick scan, we found multiple communication codes pointing to the BCM. Before replacing it, we checked the main BCM ground connection under the dash. Sure enough, it was loose and slightly corroded. While in this case tightening the ground fixed it, a faulty BCM presents identical symptoms. Always check your grounds during the swap to prevent a comeback!
Is Your Yukon XL 2500 Showing These Symptoms?
- ✔ Power windows, door locks, or mirrors not working or operating erratically.
- ✔ Interior or exterior lights staying on, not turning on, or flickering.
- ✔ HVAC and climate control functions are inoperative or behaving strangely.
- ✔ The vehicle’s security system is malfunctioning, causing no-start conditions or false alarms.
- ✔ An airbag warning light is illuminated on the dash, often with DTC B1001.
- ✔ Intermittent stalling, misfires, or other performance issues tied to electrical faults.
Why Choose Our Pre-Programmed 2007-2011 Yukon XL 2500 BCM?
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We pre-program the module to your vehicle’s specific VIN before shipping. This critical step ensures that the BCM communicates flawlessly with all other modules in your truck right out of the box. You get to skip the expensive and time-consuming trip to the dealership for programming. Simply install it, perform any necessary relearn procedures, and enjoy a fully functional vehicle again. This module is a direct replacement for a variety of part numbers, including 25844480, 25835966, 15943678, and 20939137.
Installation and Post-Install Notes
Physically installing the 2007-2011 Yukon XL 2500 BCM is straightforward. It’s typically located under the driver’s side dashboard, near the steering column, and can be swapped in minutes. However, depending on your vehicle’s configuration, some post-installation steps may be necessary:
- Airbag System Sync: If the airbag warning light is on after installation, a technician will need to use a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: Some models may require a brake pedal position sensor recalibration to ensure proper brake light and traction control operation.
There is no core charge for this part, so you can keep your old module without any hassle.
Frequently Asked Questions
What does a BCM do on a 2007-2011 Yukon XL 2500?
The Body Control Module, or BCM, is a computer that manages and controls many of your truck’s non-engine related functions. This includes the power windows, door locks, interior and exterior lighting, security system, wipers, and HVAC climate controls.
Is this BCM difficult to install?
The physical installation is simple for most DIY mechanics. It’s located under the steering column and held in by a few clips or bolts. The entire swap usually takes less than 15 minutes. However, be prepared for potential electronic ‘relearn’ procedures afterward.
Will I need to take my truck to the dealership after installation?
No. This BCM comes pre-programmed to your vehicle’s VIN. This eliminates the need for dealership programming. In some cases, a relearn procedure for the airbag or brake pedal sensor may be needed, which can be done by most independent repair shops with an advanced scan tool.
What happens if my airbag light is on after installing the new BCM?
This is a common occurrence. It means the new BCM needs to be electronically introduced to the vehicle’s Sensing and Diagnostic Module (SDM). A mechanic must perform the ‘Setup SDM Primary Key in BCM’ procedure with a diagnostic tool to resolve this.
Does this part number 20939137 replace other numbers?
Yes, this BCM is a direct replacement for many part numbers, including 25844480, 25835966, 15263363, 15878753, 15943678, 25971916, and more. It is designed to fit a wide range of GM trucks and SUVs from this era.