Restore Full Functionality to Your Hummer H2
If you’re dealing with bizarre electrical issues in your 2008-2009 Hummer H2—like flickering interior lights, power windows with a mind of their own, or a security light that won’t turn off—you’ve likely pinpointed the culprit: a failing Body Control Module (BCM). As an expert with over 20 years of hands-on diagnostic experience, I can tell you that the BCM is the central command for your vehicle’s body electronics. When it fails, it can cause a cascade of frustrating and seemingly unrelated problems.
This isn’t just a replacement part; it’s a comprehensive solution. We offer a professional Cloning Service with this module. This means we transfer the exact data from your original BCM to this replacement unit. The result? A true plug-and-play module that requires no expensive trip to the dealership for programming. Your vehicle’s VIN, mileage, and key information are preserved, ensuring a seamless and correct integration.
A Technician’s Notebook
I remember a 2008 H2 that came into my bay with a classic case of BCM failure. The owner was frustrated because his battery would die overnight, and his power door locks worked intermittently. He’d already replaced the battery twice. A quick scan showed multiple communication loss codes (U-codes) with various modules. This is a tell-tale sign the BCM isn’t directing traffic correctly on the vehicle’s network. After confirming power and grounds to the BCM were good, we knew the module itself was the issue. By providing a cloned BCM, we had him back on the road the same day with all systems go—no extra programming fees, no lingering issues. This is the exact type of reliable fix we provide.
Is Your Hummer H2 Showing These Symptoms?
A faulty BCM can manifest in many ways. If you’re noticing any of the following, it’s a strong indicator that your Body Control Module needs attention:
- ✔ Erratic or non-functional interior and exterior lights.
- ✔ Power windows, mirrors, or door locks operating intermittently or not at all.
- ✔ The security system light stays on or flashes, preventing the vehicle from starting.
- ✔ The horn sounding unexpectedly or not working when pressed.
- ✔ Instrument panel gauges behaving erratically or going dark.
- ✔ Diagnostic trouble codes (DTCs) related to communication loss, such as U0140, U0155, or U0164.
- ✔ A parasitic battery drain that kills your battery overnight.
Your Straightforward BCM Installation Guide
For the confident DIYer, swapping the BCM is a manageable job. In the Hummer H2, the BCM is located on the left-hand (driver’s side) firewall. Follow these general steps for a successful installation:
- 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 Module: Find the BCM mounted to the firewall on the driver’s side, typically up under the dashboard.
- Disconnect and Remove: Carefully unplug the electrical connectors. 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, cloned BCM in the same location and securely fasten it.
- Reconnect Everything: Plug all electrical connectors back into the new BCM. Ensure they click into place for a solid connection.
- Power Up: Reconnect the negative battery terminal. Turn the key to the ‘On’ position (without starting the engine) and test all body functions: lights, locks, windows, etc.
Important Post-Installation Information
Our cloning service makes this process as simple as possible, but some vehicle systems may require a recalibration after the BCM is replaced. Please be aware of the following:
- Airbag System Sync: If your 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 airbag system with the new BCM.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be required to ensure your brake lights and traction control system function correctly.
Disclaimer: Vehicle systems vary. We always recommend consulting a factory service manual or a certified technician for procedures specific to your vehicle.
Verified Vehicle Compatibility
This BCM is a direct replacement for part number 15872388 and is also compatible with a wide range of other part numbers and GM vehicles. Please match your part number or vehicle from the list below to ensure proper fitment.
Interchangeable 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
Fits Models Including:
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 1500/2500/3500 VANS 08-12
G8 08-09
HUMMER H2 08-09
IMPALA 06-13
LUCERNE 06-11
MONTE CARLO 06-07
OUTLOOK 07-10
SAVANA 1500/2500/3500 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 exactly is a ‘Cloning Service’?
Cloning is the process of reading the essential software and vehicle-specific data (like VIN, mileage, and key codes) from your original BCM and writing it directly onto the replacement module. This makes the new module an exact electronic duplicate of the old one, eliminating the need for dealer programming.
Why do you need my original BCM?
We need your original module to perform the cloning service. The data stored on it is unique to your vehicle. Once we transfer this data to the replacement BCM, we will ship both your original module and the ready-to-install replacement back to you.
Is this BCM guaranteed to be plug-and-play?
Yes, because of our cloning service, the module will be plug-and-play for all the functions controlled by the BCM itself. However, as noted above, some interconnected systems like the Airbag (SDM) may require a ‘sync’ procedure with a proper scan tool if a warning light appears after installation.
Will this fix my ‘Service Security System’ message?
In many cases, yes. The BCM is a critical part of the Passlock/Passkey security system. A failing BCM is a very common cause of security-related warnings and no-start conditions. This cloned module will restore the original security information, resolving the issue if the BCM was the root cause.
What if my original BCM is completely dead or unreadable?
If your module has suffered severe water or fire damage and we cannot retrieve the data, we will contact you to discuss other options, which may involve programming from the GM database using your VIN. Please contact us first if you suspect your module is unreadable.