Tired of Unpredictable Electronics in Your GMC Sierra Denali?
If you’re dealing with a 2007-2010 Sierra Denali that seems to have a mind of its own—with flickering lights, a dead HVAC system, or power locks that work intermittently—you’ve likely met the common point of failure: the Body Control Module (BCM). As the central command for your truck’s body electronics, a failing BCM can cause a cascade of frustrating and hard-to-diagnose issues. This isn’t just an annoyance; it can affect vehicle security and safety. This replacement BCM, part number 15926094, is the definitive solution to restore full functionality and peace of mind.
Case Study: A Tricky Diagnosis
I remember a 2008 Sierra Denali that came into my bay with the owner at his wit’s end. The radio would cut out, the driver’s side window wouldn’t respond, and the security light would flash randomly, sometimes preventing the truck from starting. He’d already replaced the battery and checked the main grounds. We initially suspected a wiring short, but after hooking up a professional scanner, we saw multiple communication loss codes pointing to the BCM. The internal logic was failing, sending erratic signals across the network. Installing a cloned BCM like this one solved every single issue in under 10 minutes. It’s a common story for these otherwise reliable trucks.
Is Your Sierra Denali Exhibiting These Symptoms?
A faulty BCM is the root cause of many electrical problems. Over my 20+ years in diagnostics, I’ve seen these modules cause a wide range of issues. Check if any of these sound familiar:
- ✔ The air conditioning or heater blower motor works only when it wants to, or not at all.
- ✔ Your airbag warning light is illuminated, often accompanied by Diagnostic Trouble Code (DTC) B1001.
- ✔ Power windows, door locks, or interior/exterior lights are behaving erratically or have stopped working completely.
- ✔ The factory security system malfunctions, causing no-start conditions, stalling, or misfires.
- ✔ You’re chasing multiple electrical gremlins and communication codes (U-codes) with no clear cause.
The Power of Our Cloning Service
Why choose our BCM? It’s simple: our Cloning Service saves you time, money, and a trip to the dealership. We transfer the critical data from your original module directly to this replacement unit. This means the new BCM arrives at your door as a true plug-and-play solution, perfectly matched to your truck’s specific features and VIN. No expensive programming or calibration tools are needed. We handle the technical work so you can get back on the road.
Your Straightforward BCM Installation Guide
Even if you’re a weekend DIYer, you can handle this job in minutes. The BCM is located under the driver’s side dashboard.
- Safety First: Always disconnect the negative terminal from your truck’s battery before working on electrical components.
- Locate the BCM: On your Sierra Denali, it’s typically found under the steering column, often mounted to a metal bracket. You may need to remove a lower dash panel for access.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs, so press them firmly to release. Once disconnected, unclip or unbolt the module from its mounting bracket.
- Install the New Module: Seat the new, cloned BCM into the bracket and securely plug in all the electrical connectors. You’ll hear a click as they lock into place.
- Reconnect and Test: Reconnect the negative battery terminal. Start your truck and test all the functions: lights, wipers, HVAC, power windows, and locks to confirm the repair was successful.
Important Post-Installation Notes
In most cases, the job is done. However, for some vehicles, a couple of extra steps might be needed:
- Airbag System Sync: If the airbag light remains on after installation, a technician will need to perform the ‘Setup SDM Primary Key in BCM’ procedure using a professional-grade scan tool. This re-syncs the security handshake between the airbag system and the new BCM.
- Brake Pedal Position Relearn: Some models may require this relearn procedure to ensure the brake lights and stability control systems function correctly.
Verified Vehicle Compatibility
This module is a direct replacement for part number 15926094 and is interchangeable with many other GM part numbers, ensuring a perfect fit for a wide range of vehicles. While this page focuses on the 2007-2010 Sierra Denali BCM, it also fits the following models:
ESCALADE & ESV & EXT 07-11
SIERRA 1500 PICKUP 07-11
SIERRA 2500 PICKUP 07-13
SIERRA 3500 PICKUP 07-13
SIERRA DENALI 07-10
SIERRA DENALI 2500/3500 11-13
SILVERADO 1500 PICKUP 07-11
SILVERADO 2500 PICKUP 07-13
SILVERADO 3500 PICKUP 07-13
SUBURBAN 1500/2500 07-11
TAHOE 07-11
YUKON & YUKON XL 1500/2500 07-11
Note: Please verify your original part number or consult the detailed fitment list for specific year and option compatibility.
Frequently Asked Questions
What exactly is the “Cloning Service”?
Our Cloning Service involves transferring all the vehicle-specific programming and security data from your original, faulty BCM to your new replacement module. This makes the new part plug-and-play, eliminating the need for dealership programming and ensuring all your truck’s options work correctly right out of the box.
Do I need to send my original BCM to you?
Yes, for the cloning process to work, you will need to send us your original module after placing your order. We perform the service and ship both your original module and the newly programmed replacement back to you. We do not keep your old part.
Will this fix my airbag light with code B1001?
A faulty BCM is a very common cause of an active airbag light with DTC B1001. Replacing it often resolves the code. However, if the light stays on after installation, the simple ‘Setup SDM Primary Key’ procedure will be required with a pro-level scan tool to finalize the communication between the modules.
Is this a difficult part for a DIYer to replace?
Not at all. The physical replacement is one of the easier jobs you can do. It’s located under the dashboard and typically held in by clips or a couple of small bolts. The entire swap usually takes less than 15 minutes. Our cloning service handles the difficult programming part for you.
Are there any other part numbers this module replaces?
Yes, this BCM is a direct replacement for numerous part numbers, including 15926094, 25835966, 20939138, 22860591, 15943678, and many others. It is designed to be a comprehensive solution for this generation of GM trucks and SUVs.