Restore Command of Your H2’s Electronics

Are you chasing electrical gremlins in your 2008-2009 HUMMER H2? One minute the power windows work, the next they don’t. The interior lights have a mind of their own, or you’re constantly seeing a ‘Service Security System’ alert. As a technician with over two decades of experience, I’ve seen these frustrating, seemingly unrelated issues hundreds of times. More often than not, the culprit is a single point of failure: the Body Control Module (BCM).

The BCM is the central nervous system for your truck’s comfort and convenience features. It manages everything from the power locks and windows to the radio and interior lighting. When it starts to fail, it can send confusing signals throughout the vehicle, making diagnosis a nightmare for the unprepared. This isn’t just an inconvenience; a faulty BCM can lead to a no-start condition, leaving you stranded.

This is your direct, reliable solution. We offer a replacement Body Control Module that comes fully programmed to your HUMMER’s specific Vehicle Identification Number (VIN). Simply provide us with your VIN after purchase, and our experts will flash the module with the latest GM software before it even leaves our facility. This means no expensive trip to the dealership for programming—a savings of both time and money. This is the definitive fix for a faulty 2008-2009 HUMMER H2 BCM, designed to restore full functionality and peace of mind.

Is Your H2 Showing These BCM Failure Signs?

A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, your BCM is the most likely cause. Proper diagnosis is always recommended, but these are the classic symptoms I see in the shop.

• ✔ Intermittent or non-working power windows, door locks, or mirrors.
• ✔ Erratic interior or exterior lights (staying on, flickering, or not working at all).
• ✔ The security system light is on, or the alarm randomly goes off.
• ✔ Key fobs are not responding.
• ✔ Radio, climate control (HVAC), or dashboard information center malfunctions.
• ✔ Diagnostic Trouble Codes (DTCs) related to lost communication, such as U0140, U0155, or other U-codes.
• ✔ An intermittent no-start condition where the engine cranks but won’t fire up.

A Straightforward Guide to Your H2 BCM Swap

Replacing the 2008-2009 HUMMER H2 BCM is a manageable job for a confident DIYer. Since our module arrives pre-programmed, you can avoid a tow to the shop. The BCM on the H2 is located on the left-hand (driver’s side) firewall, inside the cabin.

1. Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes before beginning work.
2. Locate the Module: Find the BCM on the driver’s side interior firewall, often tucked behind the lower dash panel. You may need to remove a trim panel for access.
3. Disconnect Connectors: Carefully unplug all electrical connectors from the old BCM. These connectors have locking tabs; do not force them. A small flathead screwdriver or a pick can help release the tabs.
4. Remove the Old BCM: Unbolt the module from its mounting bracket. It’s typically held in place by a few small bolts or nuts.
5. Install the New BCM: Mount your new, pre-programmed module in the same location and secure it with the original hardware.
6. Reconnect Everything: Plug all electrical connectors firmly back into the new BCM. You should hear or feel a ‘click’ as they lock into place.
7. Power Up: Reconnect the negative battery terminal.
8. Final Checks: Start the vehicle and test all functions: windows, locks, lights, radio, etc. Note the post-installation procedures below, as some systems may require a relearn.

Important Post-Installation Information

While this module is designed for plug-and-play installation, some vehicle systems may need to be re-synchronized. There is no core charge for this part, so you can keep your original module.

Airbag System Sync: If the airbag warning light is illuminated after installation, a ‘Setup SDM Primary Key in BCM’ procedure is required. This must be done with a professional-grade diagnostic tool to sync the airbag system with the new BCM and clear the light.

Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration may be necessary to ensure correct brake light operation and to prevent issues with the traction control system.

Disclaimer: Vehicle systems vary. Always refer to a factory service manual or consult with a qualified technician if you are unsure about any step.

Verified Vehicle Compatibility

While this is the correct part for the 2008-2009 HUMMER H2 BCM, it also fits a wide range of other GM vehicles. Please verify your part number or vehicle in the list below.

This part will fit these makes and models with these options

This BCM is a direct replacement for 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, 95151084