Tired of Your Vehicle’s Electrical Gremlins?
Is your GM vehicle acting like it’s possessed? Flickering dash lights, power windows with a mind of their own, a security system that randomly immobilizes your car, or a key fob that works one minute and not the next. These aren’t just annoyances; they’re classic signs of a failing Body Control Module (BCM). The BCM is the central nervous system for your vehicle’s comfort and security features. When it starts to fail, it can cause a cascade of baffling electrical problems that are often misdiagnosed, costing you time and money.
This isn’t just a replacement part; it’s a complete, hassle-free solution. We offer a reliable Programmed GM BCM that arrives at your door ready for installation. Simply provide your vehicle’s VIN during checkout, and our experts will flash the module with the latest GM software specific to your car or truck. This eliminates the need for an expensive trip to the dealership for programming, saving you hundreds of dollars and significant downtime.
A Technician’s Notebook: The 2009 Acadia That Wouldn’t Cooperate
I remember a 2009 GMC Acadia that came into the shop with a laundry list of complaints from the owner. The radio would turn on and off, the dome lights would stay on, draining the battery overnight, and occasionally, it just wouldn’t start. The customer had already replaced the battery and alternator elsewhere. After connecting my scan tool, I saw a storm of U-codes, specifically a U0140 (Lost Communication With Body Control Module). This told me the BCM wasn’t talking to the other modules correctly. Instead of a complex wiring issue, the root cause was an internal failure in the BCM itself. We installed a VIN-programmed module, and all the bizarre electrical issues vanished instantly. It’s a perfect example of how a single component can create widespread, confusing symptoms.
Common Signs of a Failing BCM
If you’re experiencing any of the following, a faulty BCM is the likely culprit. A failing module can trigger various Diagnostic Trouble Codes (DTCs), most commonly communication codes like U0140, U0155, or specific body codes (B-codes).
- ✔ Power windows, door locks, or mirrors operating erratically or not at all.
- ✔ Interior or exterior lights staying on or not turning on.
- ✔ Horn honking unexpectedly or not working.
- ✔ Vehicle security system light flashing, preventing the engine from starting.
- ✔ Keyless entry remote failing to lock or unlock doors.
- ✔ Wipers activating on their own or not responding.
- ✔ False warnings on the instrument cluster (e.g., “Service Theft System”).
A Straightforward Guide to Installation
Installing your Programmed GM BCM is a manageable job for a DIY enthusiast. While the location varies slightly by model, the process is generally the same.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes to ensure all systems are powered down.
- Locate the BCM: On most of these GM models, the BCM is located inside the cabin, typically under the driver’s side or passenger’s side of the dashboard, or behind the center console. A quick search for your specific model will confirm its location.
- Remove the Old Module: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once unplugged, unbolt or unclip the old BCM from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed BCM in place of the old one. Securely reconnect all electrical connectors, ensuring they click into place.
- Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position (without starting the engine) and test your electronics: windows, locks, lights, and wipers.
Important Post-Installation Notes
In some cases, additional steps known as ‘relearn’ procedures may be necessary to sync the new BCM with other vehicle systems. These are not required for all vehicles.
- Airbag System Sync: If the airbag warning light is on after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This ensures the airbag system communicates correctly with the new BCM.
- Brake Pedal Position Relearn: On certain models, a brake pedal position sensor relearn may be needed to ensure brake lights and traction control function properly.
- No Core Charge: You can keep your old module, as there is no core charge or need to return it.
Disclaimer: Vehicle systems vary. For procedures specific to your exact model, always consult a factory service manual or a certified automotive technician.
Verified Vehicle Compatibility
This module is a direct-fit replacement for a wide range of GM vehicles. It is compatible with the following service 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. Please match your part number or confirm fitment with your vehicle’s make and model from the list below.
AVALANCHE 1500 10 (under steering column, ID 25892622)
CAPRICE 11-13
CAPTIVA SPORT 12 (center dash, check ID)
CTS 08-13 (LH or RH dash, check notes)
DTS 06-11 (RH center dash)
ENCLAVE 08-12 (LH dash)
EQUINOX 07-09 (center dash)
ESCALADE / ESV / EXT 10 (under steering column, check ID)
EXPRESS VANS 08-12 (center dash, check engine/model specifics)
G8 08-09 (center dash)
HUMMER H2 08-09 (LH firewall)
IMPALA 06-13 (LH dash, check ID for ’13)
LUCERNE 06-11 (right side dash)
MONTE CARLO 06-07 (LH steering column)
OUTLOOK 07-10 (center dash)
SAVANA VANS 08-12 (center dash, check engine/model specifics)
SRX 07-09 (LH dash)
STS 10 (center dash)
SUBURBAN 1500 10 (under steering column, check ID)
TAHOE 10 (under steering column, check ID)
TORRENT 07-09 (center dash)
TRAVERSE 09-12 (LH dash)
VUE 08-10 (center dash)
YUKON / YUKON XL 1500 10 (under steering column, check ID)
Frequently Asked Questions
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to program the BCM with the exact software and settings your vehicle had from the factory. This ensures all features work correctly and makes the installation a simple plug-and-play process, avoiding a trip to the dealer.
Do I have to get this programmed at a dealership?
No. The main benefit of our service is that we handle all the programming for you before we ship the part. It will arrive ready to be installed without the need for expensive dealer tools or software.
What is a BCM and what does it do?
The Body Control Module (BCM) is a computer in your vehicle that controls a wide range of electronic functions not related to the engine. This includes power windows, locks, interior/exterior lighting, wipers, security systems, and more.
Where is the BCM located on my vehicle?
The location varies, but it’s almost always inside the passenger cabin. Common locations are under the dashboard on the driver’s side, behind the glove box, or in the center console area. The fitment list above provides general location information for many models.
Is there a core charge for this part?
No, there is no core charge. You are not required to send your old, faulty BCM back to us.
Will this fix my ‘Service Theft System’ light?
In many cases, yes. The BCM is a critical part of the vehicle’s anti-theft system. A failing BCM is a very common cause for this warning light and the associated no-start condition.