Restore Command of Your Hummer’s Electronics
Is your 2008-2009 Hummer H2 acting possessed? Flickering lights, malfunctioning power windows or locks, a security light that won’t turn off, or even a frustrating no-start condition can often be traced back to one component: a failing Body Control Module (BCM). As the central nervous system for your vehicle’s comfort and security features, when the BCM goes down, it can cause a cascade of confusing and annoying electrical problems. Driving a vehicle as capable as an H2 with these issues isn’t just frustrating; it can compromise its usability and safety.
Forget the expensive trip to the dealership and the hassle of programming a new module from scratch. We offer a direct, reliable solution. This isn’t just a replacement part; it’s a complete, ready-to-install fix. Through our professional Cloning Service, we transfer the essential data from your original BCM directly onto this replacement unit. This means the module arrives at your door pre-programmed with your vehicle’s specific information, including the latest GM software updates. It’s the closest you can get to a true plug-and-play repair for a complex electronic component.
A Technician’s Notebook
I remember a 2008 H2 that came into the shop with the owner at his wit’s end. The dome lights would randomly stay on, draining the battery overnight, and the power locks worked only when they felt like it. He had already replaced the battery and checked all the fuses. A scan showed a handful of U-codes (communication errors), pointing to a network issue. After isolating the circuits, we pinpointed the BCM as the culprit. The internal logic was failing, sending erratic commands across the vehicle’s network. Installing one of our pre-programmed modules solved every single issue in under an hour. It’s a classic failure mode for these vehicles, and this is the most direct fix.
Is Your Hummer H2 Showing These Symptoms?
A failing BCM can manifest in many ways. If you’re experiencing any of the following, this module is the likely solution:
- ✔ Erratic or non-functional power windows, door locks, and mirrors.
- ✔ Interior or exterior lights staying on or not turning on at all.
- ✔ The security or anti-theft light is illuminated, preventing the engine from starting.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ Instrument cluster gauges behaving erratically or going dark.
- ✔ Diagnostic trouble codes (DTCs) related to communication, such as U0140, U0155, or other U-codes.
Your Straightforward BCM Installation Guide
Installing your new BCM is a manageable job for a DIY enthusiast. On the 2008-2009 Hummer H2, the BCM is located on the driver’s side, attached to the firewall. Follow these general steps for a successful installation:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
- Locate the BCM: On the H2, you’ll find the BCM mounted to the firewall, typically to the left of the steering column. You may need to remove a lower dash panel for access.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unbolt the module from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed BCM in the same location and securely reconnect all the electrical connectors. Ensure they click into place.
- Reconnect Battery: Reattach the negative battery terminal.
- Test Functionality: Start the vehicle and test all the body functions—lights, locks, windows, horn, etc.—to confirm the repair was successful. Note the post-installation procedures below.
Important Post-Installation Steps
While our cloning service handles the main programming, some vehicle systems may require a relearn procedure after the BCM is replaced. This is normal. Key procedures include:
- 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 syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: Some models may require this procedure to ensure brake lights and stability control systems function correctly.
Disclaimer: Vehicle systems vary. Always have a factory service manual for your specific model on hand or consult with a certified mechanic if you are unsure about any step.
Verified Vehicle Compatibility
This BCM is a direct replacement for part number 20864768 and is interchangeable with a wide range of other part numbers. Please verify your original part number is on this list to ensure compatibility.
Compatible 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
This part will fit these makes and models with these options
EQUINOX 07-09 Body Control (BCM); (center dash)
EXPRESS 2500 VAN 10 Body Control (BCM); (center dash), 6.0L
EXPRESS 3500 VAN 08-09 Body Control (BCM); (center dash)
SAVANA 3500 VAN 10 Body Control (BCM); (center dash), 6.6L, VIN 6 (8th digit, opt LMM)
IMPALA 06-12 Body Control (BCM); (LH dash)
SAVANA 2500 VAN 10 Body Control (BCM); (center dash), 4.8L
ACADIA 07-12 Body Control (BCM); (LH dash)
MONTE CARLO 06-07 Body Control (BCM); (LH steering column)
TAHOE 10 Body Control (BCM); (under steering column), ID 25892622
TRAVERSE 09-12 Body Control (BCM); (LH dash)
YUKON 10 Body Control (BCM); (under steering column), ID 25892622
SAVANA 2500 VAN 11-12 Body Control (BCM); (center dash)
YUKON XL 1500 10 Body Control (BCM); (under steering column), ID 20815898
CAPTIVA SPORT 12 Body Control (BCM); (center dash), ID 20921435 or 22860591
DTS 06-11 Body Control (BCM); (RH center dash)
OUTLOOK 07-10 Body Control (BCM); (center dash)
SUBURBAN 1500 10 Body Control (BCM); (under steering column), ID 25892622
ESCALADE EXT 10 Body Control (BCM); (under steering column), ID 25892622
SAVANA 1500 VAN 08-12 Body Control (BCM); (center dash)
EXPRESS 2500 VAN 11-12 Body Control (BCM)
EXPRESS 1500 VAN 08-12 Body Control (BCM); (center dash)
STS 10 Body Control (BCM); center dash
TORRENT 07-09 Body Control (BCM); (center dash)
TAHOE 10 Body Control (BCM); (under steering column), ID 20815898
CTS 08-13 Body Control (BCM); LH dash
CAPTIVA SPORT 12 Body Control (BCM); (center dash), ID 20921436
G8 08-09 Body Control (BCM); (center dash)
IMPALA 13 Body Control (BCM); (LH dash), ID 22820315
SUBURBAN 1500 10 Body Control (BCM); (under steering column), ID 20815898
AVALANCHE 1500 10 Body Control (BCM); (under steering column), ID 25892622
EXPRESS 2500 VAN 10 Body Control (BCM); (center dash), 4.8L or 6.6L
YUKON 10 Body Control (BCM); (under steering column), ID 20815898
ESCALADE 10 Body Control (BCM); (under steering column), ID 25892622
LUCERNE 06-11 Body Control (BCM); (right side dash)
CTS 08 Body Control (BCM); RH dash
ESCALADE ESV 10 Body Control (BCM); (under steering column), ID 25892622
EXPRESS 3500 VAN 10 Body Control (BCM); (center dash), 4.8L or 6.0L
SAVANA 2500 VAN 08-09 Body Control (BCM); (center dash)
SAVANA 3500 VAN 10 Body Control (BCM); (center dash), 4.8L or 6.0L
YUKON XL 1500 10 Body Control (BCM); (under steering column), ID 25892622
ESCALADE 10 Body Control (BCM); (under steering column), ID 20815898
SRX 07-09 Body Control (BCM); LH dash
ESCALADE ESV 10 Body Control (BCM); (under steering column), ID 20815898
EXPRESS 3500 VAN 11-12 Body Control (BCM)
HUMMER H2 08-09 Body Control (BCM); (LH firewall)
SAVANA 3500 VAN 11-12 Body Control (BCM)
VUE 08-10 Body Control (BCM); (center dash)
CAPRICE 11-13 Body Control (BCM)
ENCLAVE 08-12 Body Control (BCM); (LH dash)
SAVANA 2500 VAN 10 Body Control (BCM); (center dash), 6.6L, VIN 6 (8th digit, opt LMM)
Frequently Asked Questions
How does the Cloning Service work?
After your purchase, you will ship your original BCM to us. Our technicians will extract the vehicle-specific data and transfer it to the replacement module. This ensures all your vehicle’s options and security information are retained, making the installation process much simpler. We then ship both your original module and the programmed replacement back to you.
Why do you need my VIN?
We require your Vehicle Identification Number (VIN) to access the latest software and calibration files from GM. This allows us to ensure your new BCM is loaded with the most up-to-date and stable software available for your specific vehicle configuration.
Do I need to send my original BCM to you?
Yes, for this cloning service, you must send us your original BCM. This is the only way we can transfer the unique data that allows the new module to work seamlessly with your vehicle’s existing components, like the ignition keys and instrument cluster.
What if I still have problems after installation?
First, check if any post-install procedures, like the airbag sync or brake pedal relearn, are needed. If issues persist, the problem may lie elsewhere in the vehicle’s wiring or with another component. Our programmed BCM is rigorously tested, but we are always here to help with diagnostic advice.
Is this a difficult part for a DIYer to replace?
For someone with basic mechanical skills, replacing the BCM is very achievable. The main challenge is typically accessing the module’s location. By providing a pre-programmed module, we eliminate the most difficult part of the job: the computer programming.