Restore Your Vehicle’s Electrical Nervous System
Are you dealing with baffling electrical issues in your GM vehicle? Flickering interior lights, power windows with a mind of their own, or a security system that prevents your car from starting? These aren’t just annoyances; they’re classic signs of a failing Body Control Module (BCM). The BCM is the central command for your vehicle’s body electronics, and when it malfunctions, it can cause a cascade of frustrating and unpredictable problems. This replacement GM Body Control Module is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a straightforward installation.
A Technician’s Notebook: The 2010 Tahoe Mystery
I once had a 2010 Chevy Tahoe in my bay that was giving its owner fits. The dash lights would flicker randomly, the radio would cut out, and sometimes it just refused to crank, showing a ‘Service Theft Deterrent System’ message. The owner had already replaced the battery and checked the alternator. After hooking up my scan tool, I found a series of communication codes (U-codes) pointing to a network issue. Instead of just throwing parts at it, we traced the problem to its source: the BCM was failing internally, causing interference on the data bus. Replacing the BCM solved every single issue. This isn’t an uncommon story; a faulty BCM is often the single culprit behind a host of electrical gremlins.
Is Your Vehicle Showing These Common BCM Failure Signs?
- ✔ Power windows, door locks, or mirrors operating intermittently or not at all.
- ✔ Interior or exterior lights staying on, flickering, or not working correctly.
- ✔ The security or anti-theft system light is on, preventing the engine from starting.
- ✔ Inaccurate or non-functional gauges on the instrument cluster.
- ✔ Multiple communication Diagnostic Trouble Codes (DTCs), such as U0140, U0155, or U0164.
- ✔ The horn sounding unexpectedly or not working when pressed.
Your Straightforward BCM Installation Guide
Installing your new BCM is designed to be a direct process. Because we program the module to your VIN before shipping, you can avoid a costly trip to the dealership for programming.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electrical work.
- Locate the BCM: The Body Control Module is typically found inside the cabin, often under the driver’s side or passenger’s side of the dashboard, or behind the center console. Consult a service manual for your specific model’s location.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that must be depressed to be removed. Once disconnected, unbolt or unclip the module from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed BCM in the same location and securely reconnect all electrical connectors. Ensure they click into place.
- Reconnect Power: Reattach the negative battery terminal. Your vehicle’s core functions should now be restored.
Important Post-Installation Steps
After installation, some vehicles may require additional calibration for specific systems to communicate with the new BCM. This is normal and ensures all safety features work as intended.
- ✔ Airbag System Sync: If the airbag warning light is illuminated after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the airbag system with the new BCM.
- ✔ Brake Pedal Position Relearn: On certain models, a brake pedal position sensor relearn may be required to ensure correct brake light operation and to satisfy the traction control system.
Disclaimer: Procedures can vary. We always recommend consulting a factory service manual or a qualified technician.
Will This Fit My Vehicle?
This GM Body Control Module is a direct replacement for a wide range of vehicles and part numbers. Please verify your vehicle is on the list below and that the part number on your original module is listed. Upon purchase, we will ask for your VIN to ensure perfect compatibility.
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
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 10, ESCALADE ESV 10, ESCALADE EXT 10, EXPRESS 1500 VAN 08-12, EXPRESS 2500 VAN 08-12, EXPRESS 3500 VAN 08-12, G8 08-09, HUMMER H2 08-09, IMPALA 06-13, LUCERNE 06-11, MONTE CARLO 06-07, OUTLOOK 07-10, SAVANA 1500 VAN 08-12, SAVANA 2500 VAN 08-12, SAVANA 3500 VAN 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 exactly does a Body Control Module do?
The BCM acts as a central computer for your vehicle’s body electronics. It controls non-engine related functions like power windows, locks, interior/exterior lighting, security system, wipers, and more.
How does the VIN programming service work?
After you place your order, you will provide us with your vehicle’s 17-digit VIN. Our technicians then use this VIN to load the latest GM-certified software onto the module, making it specific to your vehicle’s factory options.
Is this part difficult to install for a DIYer?
For someone with basic mechanical skills, the physical swap is straightforward. The main challenge with BCM replacement is typically the programming, which we handle for you. This makes it a very manageable DIY job.
Do I need to send my old BCM back?
No, there is no core charge for this part. You can keep your original module.
Will this fix my ‘Service Theft Deterrent System’ warning?
A faulty BCM is a very common cause of this warning and a related no-start condition. While other issues can cause it, if you’re also experiencing other electrical problems, replacing the BCM is a likely solution.
What tools are required for the post-installation procedures?
The Airbag System Sync and Brake Pedal Position Relearn require a bi-directional professional diagnostic scan tool, like a GM Tech 2 or equivalent high-end scanner. Many local repair shops can perform these procedures if needed.