Restore Control and End Electrical Frustration in Your Cadillac
Is your 2007-2009 Cadillac SRX acting possessed? Flickering lights, power windows with a mind of their own, or a security system that randomly prevents you from starting the car are all classic signs of a failing Body Control Module (BCM). As the central command for your vehicle’s body electronics, a faulty BCM can cause a cascade of confusing and annoying problems. In my 20+ years as a technician, I’ve seen how a bad BCM can turn a luxury vehicle into a source of daily frustration. This isn’t just an inconvenience; it can affect your vehicle’s security and safety.
We offer a simple, reliable solution. This Body Control Module is a direct-fit replacement, but with one crucial advantage: we program it to your vehicle’s specific VIN before it ships. This means you can bypass the expensive and time-consuming trip to the dealership for programming. You get a part that’s loaded with the latest GM software updates and is ready for installation right out of the box, getting you back on the road with confidence.
A Technician’s Notebook: The SRX with a Mind of Its Own
A customer brought in a 2008 SRX with a truly bizarre list of complaints. The radio would switch off, the dome light would flicker while driving, and occasionally the key fob wouldn’t work. They had already replaced the battery and checked the alternator. Diagnostics showed a handful of communication error codes (U-codes) but nothing pointing to a single failed component. This is a classic BCM failure scenario. The module itself was failing internally, corrupting communication on the data bus and causing these seemingly unrelated systems to malfunction. After installing a VIN-programmed BCM like this one, all the ghost-in-the-machine issues vanished. It’s a reminder that sometimes the most complex problems have a straightforward solution.
Signs Your BCM May Be Failing
The BCM is the nerve center for dozens of functions. If you’re experiencing any of the following, your BCM is the likely culprit. A failing module can sometimes set codes like U0140, B1000, or other communication-related DTCs.
- ✔ Erratic power windows, door locks, or interior/exterior lights.
- ✔ The security or anti-theft system light stays on, preventing the car from starting.
- ✔ Key fobs stop working or work intermittently.
- ✔ Dashboard warning lights illuminate for no apparent reason.
- ✔ Wipers or the horn activate unexpectedly.
- ✔ Poor or no communication with a diagnostic scan tool.
A Straightforward Guide to Installation
Replacing the BCM on your SRX is a manageable job for a DIYer with basic tools. On this model, it’s located on the left (driver’s) side of the dash. Our pre-programming saves you the most difficult step.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes for the system to fully discharge.
- Locate the BCM: On the 2007-2009 SRX, you’ll typically find the BCM behind the lower dash panel on the driver’s side, near the steering column. You may need to remove a trim panel for access.
- Disconnect and Remove: Carefully unplug the electrical connectors. Most have a locking tab that needs to be pressed or lifted. Once disconnected, unbolt the module from its mounting bracket.
- Install the New Module: Seat the new, pre-programmed BCM onto the mounting bracket and secure it. Reconnect all electrical connectors, ensuring they click firmly into place.
- Reconnect Battery & Test: Reinstall any trim panels you removed. Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all functions: lights, locks, windows, radio, etc.
Important Post-Installation Notes
While our programming handles the heavy lifting, some GM vehicles require a simple ‘re-learning’ or synchronization process for certain systems after the BCM is replaced. These are not always necessary but are good to be aware of.
- Airbag System Sync: If your airbag warning light is on after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be required to ensure correct brake light and traction control operation.
Disclaimer: Vehicle systems vary. Always consult a factory service manual or a qualified professional if you are unsure about any step.
Verified Vehicle Compatibility
This BCM, part number 15948439, is a direct replacement for a wide range of GM vehicles. It is compatible with the original part numbers listed below. Please confirm your vehicle is on the list to ensure proper fitment. The primary fitment for this listing is the 2007-2009 Cadillac SRX (LH dash).
Interchangeable Part Numbers: 10382479, 15093910, 15276271, 15299986, 15819552, 15828601, 15837419, 15872388, 15872421, 15880684, 15921352, 15921353, 15948438, 15948439, 20815898, 20839063, 20864767, 20864768, 20921435, 20921436, 20935349, 22860591, 25826124, 25826125, 25847588, 25847589, 25892622, 25910474, 25934762, 25934763, 95151084
Also fits the following models (check location notes): Acadia (07-12), Avalanche 1500 (10), Caprice (11-13), Captiva Sport (12), CTS (08-13), DTS (06-11), Enclave (08-12), Equinox (07-09), Escalade/ESV/EXT (10), Express/Savana Vans (08-12), G8 (08-09), Hummer H2 (08-09), Impala (06-13), Lucerne (06-11), Monte Carlo (06-07), Outlook (07-10), STS (10), Suburban 1500 (10), Tahoe (10), Torrent (07-09), Traverse (09-12), Vue (08-10), Yukon/XL 1500 (10).
Frequently Asked Questions
Do I need to send my old BCM back?
No, there is no core charge for this part. You can keep your original module.
Is this part difficult to install?
For someone with basic mechanical skills, it’s a very manageable job. The most difficult part of the process, the programming, is already done for you. The main task is accessing the module behind the dash.
How do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We cannot program and ship your module without it. Please double-check it for accuracy.
What if my part number isn’t listed?
The provided list of interchangeable numbers is extensive. If your number is not on the list, please contact us before ordering to ensure compatibility. Using the wrong BCM can cause system malfunctions.
Will this fix my ‘Service Theft System’ message?
Yes, a faulty BCM is one of the most common causes of a persistent ‘Service Theft System’ warning and no-start conditions on these GM vehicles. This programmed module is designed to resolve that issue.
What tools are required for the post-installation procedures?
The Airbag System Sync and Brake Pedal Position Relearn require a bi-directional professional diagnostic tool, like a GM Tech 2 or equivalent high-end scanner. Many local repair shops can perform these services if needed.