Fix Your GMC Yukon’s Electrical Problems for Good
If you’re dealing with baffling electrical issues in your 2007-2011 GMC Yukon—like flickering lights, a dead HVAC blower, or power windows with a mind of their own—a failing Body Control Module (BCM) is the most likely culprit. As a technician with over two decades of experience, I’ve seen these modules cause some of the most frustrating and hard-to-diagnose problems on the GM GMT900 platform. This OEM-quality replacement BCM, part number 25823559, is the definitive solution to restore full functionality and peace of mind to your vehicle.
The BCM is the nerve center for your truck’s comfort and convenience features. It commands everything from your interior and exterior lighting to the door locks, security system, and windshield wipers. When it fails, your reliable Yukon can quickly become an unpredictable source of annoyance. Our modules are expertly programmed to your vehicle’s specific VIN before they ship, ensuring a seamless, plug-and-play installation without a mandatory trip to the dealership for expensive calibration.
From the Diagnostic Bay: The Case of the Ghostly Glitches
A customer brought in a 2009 Yukon Denali with a list of complaints that seemed unrelated. The radio would cut out, the driver’s side window wouldn’t go down, and the airbag light was on. His previous mechanic had replaced the battery and checked the alternator, but the problems persisted. After hooking up my scanner, I saw a dozen communication codes (U-codes) and a B1001 for the SDM. Instead of chasing each individual problem, I went straight for the central hub: the BCM. A quick check of the data stream confirmed it was dropping communication intermittently. We installed a VIN-programmed 2007-2011 Yukon BCM, performed the SDM key relearn, and every single issue was resolved in under 15 minutes. It’s a classic failure I’ve fixed hundreds of times.
Is Your Yukon Showing These Electrical Gremlins?
A faulty BCM can manifest in numerous ways. If you’re noticing any of the following, it’s time for a replacement:
- ✔ Erratic or non-working power windows, door locks, or mirrors.
- ✔ HVAC controls that are unresponsive or a blower motor that works intermittently.
- ✔ An illuminated airbag warning light, often with a DTC B1001 (Setup SDM Primary Key in BCM).
- ✔ Security system malfunctions, causing no-start conditions or random alarm activation.
- ✔ Headlights, taillights, or interior lights that won’t turn on or off.
- ✔ A cluster of seemingly unrelated Diagnostic Trouble Codes (DTCs), especially communication codes.
A Straightforward Guide to BCM Installation
For the confident DIYer or professional mechanic, replacing the BCM is a quick job. No specialized tools are needed for the physical swap.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on electrical components.
- Locate the BCM: On most 2007-2011 Yukon models, the BCM is located under the driver’s side of the dashboard, near the steering column. It’s a black box with several large electrical connectors.
- Swap the Module: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Unbolt or unclip the old module and install the new one in its place.
- Reconnect and Test: Securely plug all connectors into your new, pre-programmed BCM. Reconnect the battery terminal and start the vehicle. Test all functions like lights, locks, and windows.
- Post-Install Sync (If Needed): If the airbag light remains on, a ‘Setup SDM Primary Key’ procedure is required using a bi-directional scan tool. This syncs the new BCM with the airbag system. A brake pedal position relearn may also be needed on some models.
Frequently Asked Questions
What does a Body Control Module do in my Yukon?
The BCM acts as the central computer for your vehicle’s body electronics. It controls non-engine related functions like your lights, power windows and locks, climate control (HVAC), security system, and wipers, ensuring everything works as intended.
Is this part truly plug-and-play?
Yes, it is. We program the module to your vehicle’s VIN before shipping, so it’s ready for installation right out of the box. This eliminates the need for a dealership visit for programming, saving you time and money.
Why is my airbag light still on after installation?
This is a common security feature. If the airbag light is on (often with code B1001), the new BCM needs to be electronically ‘introduced’ to the airbag system’s computer (SDM). This procedure, called ‘Setup SDM Primary Key in BCM’, must be done with a professional-grade scan tool but only takes a few minutes.
Do I need to send my old BCM back?
No. There is absolutely no core charge for this part. You can keep your old module without any extra fees or hassle.
Will this BCM interchange with other part numbers?
Yes, this module is a direct replacement for a wide range of part numbers, including: 25835966, 15263363, 15263497, 15878753, 15284816, 15943678, 15926094, 15940214, 25790508, 25790509, 25823558, 25835965, 25844479, 25971916, 25971917, 15901388, 20939137, 20939138, and 22860591.
Verified Fitment for Your GM Truck or SUV
This Body Control Module is a guaranteed fit for the following vehicles:
ESCALADE 07-11
ESCALADE ESV 07-11
ESCALADE EXT 07-11
SIERRA 1500 PICKUP 07-11
SIERRA 2500 PICKUP 07-13
SIERRA 3500 PICKUP 07-13
SIERRA DENALI 07-10
SIERRA DENALI 1500 11
SIERRA DENALI 2500 11-13
SIERRA DENALI 3500 11-13
SILVERADO 1500 PICKUP 07-11
SILVERADO 2500 PICKUP 07-13
SILVERADO 3500 PICKUP 07-13
SUBURBAN 1500 07-11
SUBURBAN 2500 07-11
TAHOE 07-11
YUKON 07-11
YUKON XL 1500 07-11
YUKON XL 2500 07-11