Restore Full Electrical Control to Your HUMMER H2
If you’re dealing with bizarre electrical issues in your 2008-2009 HUMMER H2—like flickering lights, malfunctioning power windows, or a security system that has a mind of its own—a failing Body Control Module (BCM) is often the culprit. As a technician with over 20 years of experience, I’ve seen how a faulty BCM can turn a dependable truck into a source of constant frustration. This isn’t just an inconvenience; it can affect vehicle safety and security. This replacement BCM is your direct, reliable solution, arriving pre-programmed to your vehicle’s specific VIN for a straightforward installation.
Case Study: A Tricky Diagnosis
A few months back, a 2009 H2 rolled into my bay with a laundry list of complaints. The dome lights wouldn’t turn off, the radio presets kept resetting, and the remote keyless entry was dead. The owner had already replaced the battery and checked all the fuses. A scan showed multiple U-codes, indicating a network communication breakdown. After isolating the circuits, we traced the fault to the BCM. A failing internal processor was sending garbage data across the CAN bus network, causing chaos. Swapping in a VIN-programmed BCM like this one resolved every single issue in under an hour. It’s a perfect example of how this single component can be the root of many seemingly unrelated problems.
Is Your HUMMER H2 Showing These Electrical Gremlins?
The BCM is the nerve center for your vehicle’s body electronics. When it fails, the symptoms can be widespread and confusing. Look out for these common indicators:
- ✔ Intermittent or non-working power windows, door locks, or mirrors.
- ✔ Erratic interior or exterior lighting (e.g., lights staying on or not turning on at all).
- ✔ Malfunctioning security system or keyless entry.
- ✔ Dashboard warning lights that appear without a clear cause, such as for the airbag or traction control system.
- ✔ Communication error codes, particularly U-codes like U0140 (Lost Communication With Body Control Module).
- ✔ Horn not working or sounding randomly.
Your Straightforward H2 BCM Installation Guide
Installing your new 2008-2009 HUMMER H2 BCM is a manageable job for a confident DIYer. The BCM is typically located on the driver’s side, attached to the firewall. Always consult a service manual for precise instructions for your vehicle.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait a few minutes for the systems to fully discharge.
- Locate the BCM: On the 2008-2009 H2, you’ll find the BCM mounted to the left-hand (driver’s side) firewall area, often behind a lower dash panel.
- Disconnect and Remove: Carefully unplug all electrical connectors from the old module. Note their orientation. Then, unbolt the module from its mounting bracket.
- Install the New Module: Mount the new BCM in the same location and securely reconnect all the electrical harnesses. Ensure each plug is fully seated.
- Reconnect Power: Reattach the negative battery terminal.
- Test and Verify: Start the vehicle and test all body functions—windows, locks, lights, wipers, and radio—to confirm the repair. Check the dash for any new warning lights.
Important Steps After Installation
Because this module is central to many systems, some vehicles may require a ‘relearn’ or synchronization procedure after installation. This is normal and ensures all components communicate correctly.
- 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: On some models, a brake pedal position sensor recalibration may be necessary to ensure proper brake light and traction control operation.
Please Note: There is no core charge for this module. You can keep your original part.
Verified Vehicle Compatibility
This 2008-2009 HUMMER H2 BCM is a direct replacement for part number 15299986 and is also compatible with a wide range of other GM vehicles and part numbers. Always match your part number to the list below to guarantee fitment.
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
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 or 20815898
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)
CTS 08-13 Body Control (BCM); LH dash or RH dash (08 only)
G8 08-09 Body Control (BCM); (center dash)
IMPALA 13 Body Control (BCM); (LH dash), ID 22820315
AVALANCHE 1500 10 Body Control (BCM); (under steering column), ID 25892622
ESCALADE / ESV 10 Body Control (BCM); (under steering column), ID 25892622 or 20815898
LUCERNE 06-11 Body Control (BCM); (right side dash)
EXPRESS 3500 VAN 10-12 Body Control (BCM)
SAVANA 2500/3500 VAN 08-12 Body Control (BCM)
SRX 07-09 Body Control (BCM); LH dash
HUMMER H2 08-09 Body Control (BCM); (LH firewall)
VUE 08-10 Body Control (BCM); (center dash)
CAPRICE 11-13 Body Control (BCM)
ENCLAVE 08-12 Body Control (BCM); (LH dash)
Frequently Asked Questions
Frequently Asked Questions
How do I provide my VIN for programming?
After you complete your purchase, simply send us a message with your vehicle’s 17-digit VIN. We will program the module with the latest GM software specific to your H2 before we ship it.
Is this part truly plug-and-play?
For most functions, yes. Because it comes pre-programmed to your VIN, it eliminates the need for expensive dealer programming. However, as noted above, certain safety systems like the airbags or traction control may require a simple ‘relearn’ procedure with a pro-level scan tool to sync properly.
What if my airbag light comes on after installation?
This is a known possibility and requires a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure. This is a security feature that ensures the airbag system communicates correctly with the new BCM.
Do I have to send my old BCM back?
No. We do not require you to return your original module. There is no core charge associated with this purchase.
Will this fix my specific electrical problem?
This module will correct any issues directly caused by a faulty BCM. While the symptoms we’ve listed are very common for BCM failure, we always recommend a thorough diagnosis by a qualified mechanic to confirm the BCM is the root cause before ordering.