Restore Full Control Over Your Vehicle’s Electronics
Are you dealing with baffling electrical issues in your Cadillac or GM vehicle? Intermittent power windows, flickering lights, a security system that acts on its own, or even a car that won’t start can all point to a single culprit: a failing Body Control Module (BCM). As the central command for your vehicle’s comfort and convenience features, a faulty BCM can make driving a frustrating experience. This isn’t just an annoyance; it’s a critical component for proper vehicle operation. This listing is for a direct-replacement BCM, pre-programmed with the latest GM software specifically for your vehicle’s VIN, making it the most reliable and straightforward fix available.
A Technician’s Notebook
A customer brought in their 2010 Cadillac STS last month with a list of bizarre symptoms. The radio would turn on by itself, the driver’s side window wouldn’t go down, and the anti-theft light was flashing, preventing the car from starting. A scan showed a dozen communication errors, all pointing back to the BCM. In my 20+ years of diagnostics, I’ve seen this exact scenario countless times on this GM platform. Water intrusion from a leaky windshield seal or cowl drain is a common cause of failure. We installed one of our pre-programmed modules, performed the quick security relearn, and had the car back to 100% in under an hour. This is the exact solution we use in our shop to guarantee a fast, reliable repair.
Is Your Vehicle 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 Body Control Module needs attention:
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Interior dome lights or dashboard lights staying on or not working at all.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ The vehicle’s security system preventing it from starting (anti-theft light flashing).
- ✔ Wipers activating on their own or not responding to the switch.
- ✔ Communication error codes with other modules (U-codes) stored in the system.
- ✔ A persistent battery drain that you can’t trace to another source.
A Straightforward Guide to Installation
Replacing your 2010 STS Body Control Module is a manageable job for a confident DIYer. Since we handle the programming, you can focus on the physical swap.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes before starting work.
- Locate the BCM: On the 2010 Cadillac STS, the BCM is typically located in the center dash area. For other models, it may be under the steering column or behind a kick panel. A quick search for your specific model will confirm the location.
- Access and Disconnect: You may need to remove a few trim panels to gain access. Once visible, carefully unplug all electrical connectors. They have locking tabs, so don’t force them.
- Remove the Old Module: Unbolt the old BCM from its mounting bracket. Keep the hardware as you’ll need it for the new part.
- Install the New BCM: Mount your new, pre-programmed BCM in place and securely reconnect all the electrical connectors. You should hear a ‘click’ as they lock in.
- Post-Installation Procedures: Reconnect the battery. You will likely need to perform a security relearn procedure (often called a Passlock or Passkey relearn), which typically involves cycling the key in the ignition. Additionally, as noted below, further steps may be required.
Important: After You Install
To ensure all systems function correctly after replacing your BCM, a couple of additional steps are often necessary:
- Airbag System Reset: If the airbag warning light is on, a scan tool is required to perform the ‘Setup SDM Primary Key in BCM’ procedure. This re-establishes communication between the airbag system and the new BCM.
- Brake Pedal Position Sensor: Some vehicles require a recalibration of the brake pedal position sensor. This is a critical safety step to ensure proper brake light operation and stability control function.
Note: Specific procedures can vary. Always consult your vehicle’s service manual or a professional technician if you are unsure.
Verified Vehicle Compatibility
This module is a direct replacement for a wide range of General Motors vehicles. Please match your original part number to the list below or confirm fitment with your vehicle’s make, model, and year. This part replaces 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.
AVALANCHE 1500 10 (under steering column), ID 25892622
CAPRICE 11-13
CAPTIVA SPORT 12 (center dash), ID 20921435/20921436/22860591
CTS 08-13 (LH dash)
DTS 06-11 (RH center dash)
ENCLAVE 08-12 (LH dash)
EQUINOX 07-09 (center dash)
ESCALADE 10 (under steering column), ID 20815898/25892622
ESCALADE ESV 10 (under steering column), ID 20815898/25892622
ESCALADE EXT 10 (under steering column), ID 25892622
EXPRESS 1500 VAN 08-12 (center dash)
EXPRESS 2500 VAN 08-12 (center dash)
EXPRESS 3500 VAN 08-12 (center dash)
G8 08-09 (center dash)
HUMMER H2 08-09 (LH firewall)
IMPALA 06-13 (LH dash)
LUCERNE 06-11 (right side dash)
MONTE CARLO 06-07 (LH steering column)
OUTLOOK 07-10 (center dash)
SAVANA 1500 VAN 08-12 (center dash)
SAVANA 2500 VAN 08-12 (center dash)
SAVANA 3500 VAN 08-12 (center dash)
SRX 07-09 (LH dash)
STS 10 (center dash)
SUBURBAN 1500 10 (under steering column), ID 20815898/25892622
TAHOE 10 (under steering column), ID 20815898/25892622
TORRENT 07-09 (center dash)
TRAVERSE 09-12 (LH dash)
VUE 08-10 (center dash)
YUKON 10 (under steering column), ID 20815898/25892622
YUKON XL 1500 10 (under steering column), ID 20815898/25892622
Frequently Asked Questions
Do I need to send my old BCM to you?
No, this is a direct sale. We program a replacement BCM for you based on your VIN, so there is no core charge or need to send in your original part.
What happens if I don’t provide my VIN?
We cannot ship your order without your vehicle’s 17-digit VIN. The programming process is essential for the module to work correctly in your car. We will contact you after your purchase to get this information.
Is this a difficult part to install myself?
For someone with basic mechanical skills and tools, it’s generally a straightforward process. The most difficult part is often accessing the module behind dash panels. Since the programming is done, the technical complexity is greatly reduced.
Will this fix my ‘Service Theft System’ message?
A faulty BCM is a very common cause of this message and a no-start condition. While other issues can cause it, replacing a bad BCM with this pre-programmed unit is a very likely solution.
What tools are needed for the post-installation steps?
The security relearn can often be done without tools. However, resetting the airbag light (SDM key setup) and recalibrating the brake pedal sensor requires a professional-grade bidirectional scan tool. Many local repair shops can perform these procedures for a small fee if you don’t have access to one.