Restore Full Control Over Your HUMMER H2’s Electronics
Are you battling bizarre electrical issues in your 2008-2009 HUMMER H2? Flickering lights, malfunctioning power windows or locks, a security system that acts up, or even a no-start condition can all point to a failing Body Control Module (BCM). As the central hub for your vehicle’s body electronics, a faulty BCM can turn your rugged H2 into a source of constant frustration. This isn’t just an inconvenience; it can be a safety issue. Instead of spending a fortune at the dealership for a new module and expensive programming, we offer a direct, reliable, and cost-effective solution.
Case Study: A Tricky Diagnosis
A customer brought in their ’09 H2 with a ghost of a problem. The radio would turn on and off by itself, the security light was flashing intermittently, and occasionally the power door locks wouldn’t respond. They had already replaced the battery and checked the main grounds. After connecting my scanner, I saw multiple U-codes (communication errors) pointing to the BCM. These are classic signs. Instead of a complex rewiring job, we used our cloning service on a replacement BCM. The process transferred all the vehicle-specific data. Once installed, all the phantom electrical issues vanished. It’s a fix I’ve performed hundreds of times on these GM platforms, saving the owner time, money, and a massive headache.
What is a BCM Cloning Service?
Our professional cloning service is the key to a simple, plug-and-play installation. When you purchase this module, you’ll send us your original BCM. Our technicians will extract the precise data—including your VIN, mileage, and key information—and flash it directly onto this replacement unit. We then ship both your original module and the ready-to-install replacement back to you. This means no additional programming or calibration is needed on your end. It’s the most seamless way to replace a failed 2008-2009 HUMMER H2 BCM.
Is Your H2 Showing These Electrical Gremlins?
- ✔ Power windows, mirrors, or door locks operating erratically or not at all.
- ✔ Interior or exterior lights flickering, staying on, or not turning on.
- ✔ The security system light is on, or the alarm goes off randomly.
- ✔ The vehicle won’t start, and you see a security message on the dash.
- ✔ Diagnostic Trouble Codes (DTCs) related to communication errors, such as U0140, U0155, or other U-codes.
- ✔ Wipers or other accessories behaving unpredictably.
Your Straightforward H2 BCM Installation Guide
- ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery and wait a few minutes to ensure all systems are powered down.
- ✔ Locate the BCM: On the 2008-2009 HUMMER H2, the Body Control Module is typically located on the driver’s side, attached to the firewall, up under the dashboard.
- ✔ 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. Securely plug in all the electrical connectors, ensuring they click into place.
- ✔ Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘ON’ position and test all body functions—lights, locks, windows, radio, etc.—to confirm the repair.
Important Post-Installation Information
While our cloning service makes this a plug-and-play part, some vehicle systems may require a ‘handshake’ with the new BCM. Please be aware of the following:
- Airbag System Sync: If your airbag warning light is illuminated 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 might be necessary for proper brake light and traction control operation.
Disclaimer: Vehicle systems can vary. We always recommend consulting a factory service manual or a certified technician if you are unsure about any step.
Verified Vehicle Compatibility
This Body Control Module is a direct-fit, pre-programmed solution for the 2008-2009 HUMMER H2. It is also compatible with a wide range of other GM vehicles that use part number 20935349 or any of the superseded numbers listed below. Please verify your original part number matches one in the 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
What exactly is a BCM cloning service?
What exactly is a BCM cloning service?
It’s a process where we transfer the vehicle-specific software and security data (like VIN and key info) from your original BCM to this replacement unit. This makes the new module plug-and-play, eliminating the need for expensive dealership programming.
Do I have to send you my old BCM?
Yes. For the cloning service to work, we need your original module to extract the data. We will ship your original module back to you along with the newly programmed replacement.
Will this fix my no-start problem?
If your no-start issue is caused by the BCM losing key data or failing to communicate with the security system (VATS/Passlock), then yes, this is the correct fix. A proper diagnosis is always recommended to confirm the BCM is the root cause.
Is any special relearn procedure required after I install it?
In most cases, no. It’s designed to be plug-and-play. However, as noted above, some vehicles may require an airbag system sync or brake pedal position relearn, which can be done with a high-end scan tool if a warning light appears.
What if my original BCM is completely dead or water damaged?
In many cases, we can still recover data from non-communicating or damaged modules. Please contact us before ordering to discuss the condition of your module, and we can advise on the likelihood of a successful data transfer.