Restore Full Functionality to Your GMC Yukon XL 1500
Are you chasing down frustrating electrical gremlins in your 2007-2011 GMC Yukon XL 1500? From flickering lights and a dead HVAC system to power windows that have a mind of their own, a failing Body Control Module (BCM) is often the root cause. The BCM is the central command center for your truck’s body electronics, and when it fails, it can create a cascade of confusing and seemingly unrelated problems. This replacement BCM, equivalent to part number 25790508, arrives expertly programmed to your vehicle’s specific VIN, eliminating the need for expensive dealership programming and getting you back on the road with confidence.
Case Study: A Tricky Diagnosis
I remember a 2009 Yukon XL that came into my shop with the owner at his wit’s end. The radio would randomly shut off, the driver’s side power window wouldn’t work, and the airbag light was on. He had already replaced the window switch and checked fuses, but the problems persisted. After connecting my scanner, I saw a handful of communication codes and a specific DTC B1001. In my 20+ years of experience, this combination almost always points to an internal BCM failure or a poor ground. We checked the main BCM ground under the dash—it was solid. The culprit was a faulty Body Control Module. By installing a VIN-programmed unit like this one, we cleared all the codes and restored every function in under an hour, saving the customer hundreds compared to a dealership repair.
Is Your Yukon XL Showing These Telltale Signs?
- ✔ The HVAC blower motor works intermittently or not at all.
- ✔ Your power windows, door locks, or interior/exterior lights operate erratically or have failed completely.
- ✔ The security system is malfunctioning, causing no-start conditions or false alarms.
- ✔ An airbag warning light is illuminated on the dash, often with a DTC B1001 stored in the system.
- ✔ The vehicle experiences strange electrical behavior, stalling, or communication errors between modules.
A Straightforward Guide to Installation
Replacing the 2007-2011 Yukon XL 1500 BCM is a job most DIYers can handle in their own driveway. The module is conveniently located and the process is simple.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the BCM: On these Yukon models, the BCM is found under the driver’s side of the dashboard, typically to the left of the steering column.
- Remove Connectors: Carefully unplug the multiple wiring harness connectors from the old module. They have release tabs that need to be depressed.
- Swap the Module: Unbolt or unclip the old BCM from its mounting bracket and set it aside. Mount the new module in its place.
- Reconnect and Test: Plug all wiring connectors firmly into the new BCM. Reconnect the battery terminal and start the vehicle to test all functions (lights, windows, locks, HVAC, etc.).
Important Post-Installation Note: While this module is pre-programmed, some vehicle systems may require a relearn procedure. If your airbag light remains on, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ function. Similarly, a ‘Brake Pedal Position Relearn’ might be necessary to ensure proper brake light and traction control operation. These procedures are straightforward for any qualified technician.
Verified Vehicle Compatibility
This Body Control Module is a direct-fit replacement for a wide range of General Motors trucks and SUVs. It is an interchangeable replacement for part numbers 25790508, 25844480, 25835966, 15943678, 20939137, 22860591, and many more. While this page focuses on the 2007-2011 Yukon XL 1500 BCM, it also fits:
- Cadillac: Escalade, Escalade ESV, Escalade EXT (2007-2011)
- Chevrolet: Avalanche 1500, Silverado (1500/2500/3500), Suburban (1500/2500), Tahoe (2007-2011)
- GMC: Sierra (1500/2500/3500), Sierra Denali, Yukon, Yukon XL (1500/2500) (2007-2011)
Always verify your part number or consult your mechanic to ensure proper fitment for your specific vehicle and options package.
Frequently Asked Questions
Do I need to send my old BCM back?
No. This part comes with no core charge, so you can keep your old module without any extra fees or hassle.
Is this module truly plug-and-play?
Yes, it is pre-programmed to your vehicle’s VIN for a plug-and-play installation. However, as with any BCM replacement, certain subsystems like the airbag (SRS) or brake position sensor may require a simple relearn procedure with a compatible scan tool if a warning light appears after installation.
What tools are needed for installation?
Basic hand tools are all that’s required for the physical installation, typically a socket set to remove the module’s mounting bolts. No special tools are needed unless a post-install relearn procedure is necessary.
Will this fix my airbag light with code B1001?
A faulty BCM is a very common cause for the B1001 code. Replacing the module will likely resolve the root cause, but you will still need to perform the ‘Setup SDM Primary Key in BCM’ procedure with a high-level scan tool to sync the new BCM with the airbag system and turn off the light.
What is the warranty on this part?
This Body Control Module is backed by our one-year warranty, giving you peace of mind and assurance in the quality of your repair.