Restore Full Electrical Control to Your Hummer H2
If your 2008-2009 Hummer H2 is plagued by bizarre electrical issues—like power windows with a mind of their own, flickering interior lights, a haywire security system, or intermittent starting problems—a failing Body Control Module (BCM) is the most likely culprit. As a technician with over 20 years of experience, I’ve seen firsthand how a faulty BCM can turn a reliable vehicle into a source of constant frustration. This module is the central command center for your truck’s body electronics, and when it fails, chaos ensues.
We offer a direct, reliable solution. This Body Control Module, part number 15948438, is fully tested and comes programmed with the latest GM software updates specifically for your vehicle. Simply provide us with your VIN after purchase, and we’ll flash the module before it ships. This means you can skip the expensive trip to the dealership for programming, saving you both time and money.
From the Diagnostic Bay
A customer’s 2008 Hummer H2 came into the shop last month with a classic case of BCM failure. The dash lights would flicker randomly, the radio would cut out, and the key fob worked only half the time. He was worried it was a massive wiring problem. After a quick scan, I found multiple communication codes pointing to the BCM. The location on the H2 (left-hand firewall) can sometimes be exposed to moisture, which is a common cause of failure. We replaced it with one of our pre-programmed units, and within an hour, all the strange electrical gremlins were gone. It’s a straightforward fix that restores the vehicle’s functionality and the owner’s peace of mind.
Is Your Hummer H2 Showing These Symptoms?
A failing BCM can manifest in numerous ways. If you’re noticing any of the following, it’s a strong indicator that your Body Control Module needs replacement:
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Interior or exterior lights that stay on, flicker, or don’t work at all.
- ✔ The security system engaging randomly or preventing the vehicle from starting.
- ✔ False warnings on the instrument cluster (e.g., ‘Service Airbag’ or ‘Service Theft System’).
- ✔ Unresponsive key fob or push-button start issues.
- ✔ Intermittent failure of the radio or climate controls.
A Straightforward Guide to Your BCM Installation
Replacing the 2008-2009 Hummer H2 BCM is a manageable job for a confident DIYer. Our pre-programming service handles the most complex part for you. Follow these general steps for a successful installation:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait 10-15 minutes to allow all systems to power down completely.
- Locate the BCM: On the 2008-2009 Hummer H2, the Body Control Module is typically located on the left-hand (driver’s side) of the firewall, inside the cabin. You may need to remove a lower dash panel for access.
- Disconnect and Remove: Carefully unplug all 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 electrical connectors. Ensure they click into place.
- Reconnect the Battery: Reattach the negative battery terminal.
- Post-Installation Procedures: This is a critical step. You will need a capable diagnostic scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure to clear any airbag warnings. Some vehicles may also require a Brake Pedal Position Sensor recalibration. If you are not equipped to do this, a local repair shop can complete these final steps for you.
Verified Vehicle Compatibility
This BCM is a guaranteed fit for the 2008-2009 Hummer H2. It also serves as a direct replacement for a wide range of other GM vehicles that use the same module architecture. This unit replaces the following 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, and 95151084.
It is compatible with models such as the Cadillac Escalade, Chevy Avalanche, Tahoe, Suburban, Express, Impala, GMC Yukon, Savana, Acadia, and more. Please verify your part number to ensure proper fitment.
Frequently Asked Questions
What exactly does a Body Control Module do?
The BCM acts as the central computer for your vehicle’s body electronics. It controls non-engine related functions like power windows, locks, lights, wipers, the security system, and the instrument cluster. When it fails, these systems can become erratic.
Is programming really included in the price?
Yes, it is. We program the module to your vehicle’s specific VIN before shipping. This ensures it communicates correctly with the other modules in your vehicle and saves you from having to pay for programming services at a dealership.
How do I provide my VIN number?
After you complete your purchase, simply send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot ship the product until we receive this information for programming.
Do I need to send you my old BCM?
No, there is no core charge or need to send us your old part. This is an outright purchase of a replacement BCM.
What other steps are needed after I install this 2008-2009 Hummer H2 BCM?
After physical installation, two key procedures are often required: an airbag system relearn (‘Setup SDM Primary Key’) and sometimes a brake pedal position sensor recalibration. These require a professional-grade scan tool to complete and are necessary for restoring full, safe functionality.