Restore Full Electrical Function to Your Cadillac CTS
Are you battling bizarre electrical issues in your 2008-2013 Cadillac CTS? Flickering lights, unresponsive power windows or door locks, a security system that acts on its own, or an intermittent no-start condition can all point to one culprit: a failing Body Control Module (BCM). As the central nervous system for your vehicle’s comfort and convenience features, a faulty BCM can make driving a frustrating experience. This isn’t just an inconvenience; it can affect vehicle security and safety systems.
Case Study: A Tricky Diagnosis
I remember a 2011 CTS that came into my shop with a complaint that would drive any owner crazy. The car would randomly refuse to start, but only in the afternoons. The battery was new, the starter tested fine, and the key fobs worked. After hours of chasing wires, we found the issue was a BCM with an internal fault that was sensitive to heat soak from sitting in the sun. It was failing to recognize the key’s security signal. Replacing the BCM solved the problem instantly. These modules can fail in the strangest ways, and a direct-fit, correctly programmed replacement is the only reliable fix.
Is Your Cadillac Showing These Symptoms?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indicator that your BCM needs attention. Often, you’ll see communication-related Diagnostic Trouble Codes (DTCs), such as U0140, U0155, or other U-codes, stored in the system.
- ✔ Power windows, mirrors, or door locks working intermittently or not at all.
- ✔ Interior dome lights or dashboard lights staying on or not turning on.
- ✔ The anti-theft or security light flashing, preventing the car from starting.
- ✔ Horn sounding unexpectedly or not working when pressed.
- ✔ Remote keyless entry failing to respond.
- ✔ Erratic behavior from the radio or climate control systems.
The Smart Solution: A VIN-Programmed BCM
The biggest hurdle in replacing a BCM has always been the expensive and time-consuming programming required at a dealership. We eliminate that step for you. When you purchase this module, simply provide us with your vehicle’s 17-digit VIN. Our technicians will flash the BCM with the latest, most stable GM software specific to your car’s options and configuration. It arrives at your door ready for installation, saving you hundreds in dealer fees and diagnostic time. This is the most efficient way to get your 2008-2013 CTS Body Control Module replaced and your car back to normal.
A Straightforward Guide to Installation
For the confident DIYer or professional technician, installing this BCM is a manageable job. The key is taking your time and being methodical. In most 2008-2013 CTS models, the BCM is located on the left (driver’s) side of the dash.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes to allow all systems to power down completely.
- Access the Module: You will likely need to remove the lower dash panel or knee bolster beneath the steering column to gain access to the BCM. Keep track of all screws and clips.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that must be depressed to be released. Once disconnected, unbolt or unclip the old module from its mounting bracket.
- Install the New BCM: Mount your new, pre-programmed BCM in the same location and securely reconnect all the electrical connectors. You should hear a ‘click’ as they lock into place.
- Reconnect and Test: Reinstall any panels you removed, then reconnect the negative battery terminal. Turn the key to the ‘On’ position (without starting the engine) and test all body functions: windows, locks, lights, radio, etc.
Important Post-Installation Notes
While we handle the primary programming, some vehicle systems may require a ‘handshake’ with the new BCM. This is normal. Please be aware of the following potential procedures:
- Airbag System Sync: If your airbag warning light is illuminated after installation, a scan tool procedure called ‘Setup SDM Primary Key in BCM’ will be necessary to sync the systems. This is a security measure and is required only if the light is on.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be needed to ensure correct brake light and traction control operation. This can typically be performed with a capable bi-directional scan tool.
- No Core Charge: You can keep your old module. There is no core charge and no need to send the original part back to us.
Disclaimer: Vehicle systems vary. We always recommend consulting a factory service manual or a certified technician if you are unsure about any step of the process.
Will This Fit My Vehicle?
This BCM is a direct replacement for a wide range of General Motors vehicles and interchanges with multiple part numbers. Please verify your vehicle is on this list and that your original part number matches one of the numbers below.
Replaces 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
Fitment Includes:
AVALANCHE 1500 10
CAPRICE 11-13
CAPTIVA SPORT 12
CTS 08-13
DTS 06-11
ENCLAVE 08-12
EQUINOX 07-09
ESCALADE 10
ESCALADE ESV 10
ESCALADE EXT 10
EXPRESS VANS 08-12
G8 08-09
HUMMER H2 08-09
IMPALA 06-13
LUCERNE 06-11
MONTE CARLO 06-07
OUTLOOK 07-10
SAVANA VANS 08-12
SRX 07-09
STS 10
SUBURBAN 1500 10
TAHOE 10
TORRENT 07-09
TRAVERSE 09-12
VUE 08-10
YUKON 10
YUKON XL 1500 10
Frequently Asked Questions
Frequently Asked Questions
What does a Body Control Module (BCM) do?
The BCM is a computer that acts as the central hub for your vehicle’s body electronics. It controls non-engine related functions like power windows, locks, lights, security system, wipers, and more, ensuring all these convenience features work together properly.
Why do you need my VIN number?
Your Vehicle Identification Number (VIN) allows us to program the BCM with the exact software and settings that your car had when it left the factory. This ensures perfect compatibility with your specific options (like sunroof, keyless entry, etc.) and is critical for a successful repair.
Is this part difficult to install?
For someone with moderate mechanical skill, the physical installation is straightforward. The main challenge with BCM replacement is typically the software programming, which we handle for you before shipping. This makes the job much more accessible for DIY repair.
What if my airbag light comes on after installation?
This is a normal possibility. For security, the new BCM needs to be electronically introduced to the airbag’s computer (SDM). A professional scan tool is required to perform the ‘Setup SDM Primary Key in BCM’ procedure to sync them and turn off the light.
Do I have to send my old BCM back?
No. This purchase does not have a core charge. You are free to keep or dispose of your original module, saving you the time and expense of return shipping.