Tired of Bizarre Electrical Problems in Your GMC?
If your 2007-2011 GMC Yukon XL 2500 is acting possessed—with flickering lights, a dead HVAC system, or power windows with a mind of their own—you’re likely dealing with a failing Body Control Module (BCM). As the central command for your truck’s comfort and convenience features, a faulty BCM can cause a cascade of frustrating issues. This replacement module, equivalent to GM part 15943678, is the definitive solution. We pre-program it to your vehicle’s VIN, ensuring it works right out of the box, no expensive dealership trip required. Restore order and reliability to your vehicle’s electronics today.
A Technician’s Notebook: The GMT900 Grounding Gremlin
I remember a 2009 Sierra 2500 that came into my bay with a laundry list of complaints: intermittent radio, dome light staying on, and a security light that would randomly prevent it from starting. The customer had already replaced the battery and alternator. After scanning, I found a dozen communication codes pointing toward the BCM. But here’s the key lesson from my 20+ years of diagnostics: on these GMT900 platforms (which your Yukon XL shares), a bad ground is often the root cause of BCM failure. Before condemning the module, I always check the main ground points, especially the one under the driver’s side A-pillar trim. In that Sierra’s case, the ground was loose. We tightened it, but the damage to the original BCM was done. Installing a new, programmed BCM and ensuring a solid ground fixed every single issue and prevented a comeback. It’s a crucial check that saves a lot of headaches.
Is Your Yukon XL Showing These Electrical Gremlins?
- ✔ The air conditioning or heater blower only works intermittently or not at all.
- ✔ Your power windows, door locks, or interior lights have stopped working correctly.
- ✔ The airbag warning light is illuminated, often with a DTC B1001 (Setup SDM Primary Key in BCM).
- ✔ The security system acts up, causing no-start conditions or stalling.
- ✔ The dashboard is lit up with multiple, seemingly unrelated warning lights.
- ✔ You’re experiencing strange battery drain that you can’t trace to a specific source.
Your 5-Minute Path to a Fully Functional Yukon
You don’t need to be a professional mechanic to handle this job. With our pre-programmed module, the installation is a simple plug-and-play process that takes less time than a coffee break. Get your 2007-2011 Yukon XL 2500 BCM working perfectly again.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on electrical components.
- Locate the BCM: On your Yukon, the BCM is located under the driver’s side of the dashboard, usually to the left of the steering column. You may need to remove a plastic knee bolster panel for access.
- Swap the Module: Carefully unplug the electrical connectors from the old BCM. They have locking tabs, so be gentle. Remove the old module and install the new one in its place.
- Reconnect and Test: Securely plug the connectors into your new BCM. Reconnect the battery terminal and start the vehicle. Test all functions: lights, wipers, locks, windows, and HVAC to confirm the repair.
- Post-Install Check: If the airbag light remains on, a special procedure called “Setup SDM Primary Key in BCM” is required using a bi-directional scan tool. This syncs the new BCM with the airbag system.
Verified Fitment for Your GM Truck or SUV
This Body Control Module is a direct-fit replacement for a wide range of General Motors vehicles. It is interchangeable with part numbers 15943678, 25835966, 15263363, 15263497, 15878753, 15284816, 15926094, 20939137, 22860591, and more. Please verify your part number or contact us with your VIN to ensure compatibility.
Fits Select Models Including:
- Cadillac Escalade / ESV / EXT (2007-2011)
- Chevrolet Avalanche 1500 (2007-2011)
- Chevrolet Silverado 1500 / 2500 / 3500 (2007-2013)
- Chevrolet Suburban 1500 / 2500 (2007-2011)
- Chevrolet Tahoe (2007-2011)
- GMC Sierra 1500 / 2500 / 3500 & Denali (2007-2013)
- GMC Yukon / Yukon XL 1500 / Yukon XL 2500 (2007-2011)
Frequently Asked Questions
Frequently Asked Questions
2007-2011 Yukon XL 2500 BCM
Will this fix my intermittent no-start problem?
A failing is a very common cause of security-related no-start issues on these GM vehicles. If your security light is on and the vehicle won’t crank, this module is a highly probable solution.