Tired of Electrical Headaches in Your GM Truck?
If your 2007-2011 GMC Sierra 1500 is acting possessed—with flickering lights, a dead radio, or random warning indicators—you’re likely dealing with a failed Body Control Module (BCM). As the central computer for your truck’s comfort and convenience features, a faulty BCM can cause a cascade of frustrating issues. This isn’t just an annoyance; it can affect safety systems like your lights and security. This direct-replacement BCM, part number 15926094, arrives fully programmed to your vehicle’s specific VIN, eliminating the need for expensive dealership visits and getting your truck back to normal, reliable operation.
From the Diagnostic Bay: The Case of the Haunted Sierra
A customer brought in his ’08 Sierra 1500 with a laundry list of bizarre symptoms: the dome light wouldn’t turn off, the power locks worked intermittently, and the radio would randomly shut down. He’d already replaced the battery and checked fuses with no luck. After connecting my scanner, I saw a slew of communication codes pointing to the BCM. These modules, especially on the GMT900 platform, are notorious for internal circuit failure after years of heat cycles. We installed a VIN-programmed module, and in less than 15 minutes, every single issue was resolved. This is a classic BCM failure I’ve diagnosed hundreds of times, and a pre-programmed module is the fastest, most effective fix.
Is Your Sierra Showing These Electrical Gremlins?
- ✔ Unresponsive or erratic power windows, door locks, or mirrors.
- ✔ Interior or exterior lights staying on, not working, or flickering.
- ✔ The security system acting up, causing no-start or stalling conditions.
- ✔ HVAC controls or the blower motor failing to operate correctly.
- ✔ An airbag warning light on the dash, often with a DTC B1001 (loss of communication with SDM).
- ✔ Inconsistent wiper operation or a radio that cuts out.
Your 5-Minute BCM Installation Guide
Replacing the Sierra 1500 Body Control Module is a straightforward job for any DIYer. The unit is typically located under the driver’s side dashboard, near the steering column.
- Safety First: Always disconnect the negative terminal from your truck’s battery before working on electrical components.
- Locate the BCM: On most models, it’s a black box with several large multi-pin connectors, mounted to a bracket beneath the steering column. You may need to remove a lower dash panel for access.
- Disconnect and Remove: Carefully press the release tabs on each electrical connector and pull them straight out. Then, unclip or unbolt the old module from its mounting bracket.
- Install the New Module: Snap the new, pre-programmed BCM into the mounting bracket and firmly reconnect all electrical connectors until they click into place.
- Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all functions: lights, windows, locks, wipers, and the HVAC system.
Post-Installation Note: In some cases, if an airbag light was present, it may remain on. This requires a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ function to sync the modules. A brake pedal position relearn may also be needed on certain models to ensure proper brake light and stability control function. And remember, there is no core charge—you can keep or discard your old part without any hassle.
Confirmed Fitment For These GM Trucks & SUVs
This module is a direct replacement for part number 15926094 and interchanges with several other part numbers including 25844480, 25835966, and 20939137. It is guaranteed to fit the following vehicles:
GMC:
- Sierra 1500 / 2500 / 3500 (2007-2013)
- Sierra Denali (2007-2013)
- Yukon / Yukon XL (2007-2011)
Chevrolet:
- Silverado 1500 / 2500 / 3500 (2007-2013)
- Avalanche 1500 (2007-2011)
- Suburban 1500 / 2500 (2007-2011)
- Tahoe (2007-2011)
Cadillac:
- Escalade / ESV / EXT (2007-2011)
Note: For 2007 models, this fits the ‘New Body Style’ (smooth door skin). Always verify your part number or consult our team if you are unsure about fitment.
Your Questions Answered
Frequently Asked Questions
How does the VIN programming work?
You provide us with your vehicle’s 17-digit VIN during checkout. We then flash the module with the latest GM-certified software specific to your truck’s factory options. This ensures it works seamlessly right out of the box.
Do I need any special tools for installation?
For the physical replacement, you’ll likely only need basic hand tools like a socket or a trim removal tool for the dash panel. No special programming tools are required unless you need to perform the optional airbag system sync.
Will this fix my airbag light with code B1001?
A faulty BCM is a very common cause for the B1001 code. Replacing it often resolves the root cause, but you will still need a bi-directional scan tool to perform the ‘Setup SDM Primary Key’ procedure to clear the light after installation.
Is there a warranty on this part?
Yes, this Body Control Module comes with a one-year warranty, giving you peace of mind and confidence in your repair.
What if my original part number is different?
This module replaces a wide range of original part numbers. Check the interchange list in the description or contact us with your original part number to confirm compatibility.